Merged in dfighter1985/ryzomcore/dfighter-tools (pull request #81)

Expression Editor

--HG--
branch : develop

code/studio/src/plugins/gui_editor/CMakeLists.txt

@@ -34,6 +34,8 @@ SET(OVQT_PLUGIN_GUI_EDITOR_HDR
 	texture_chooser.h
 	action_property_manager.h
 	texture_property_manager.h
+	expression_editor.h
+	expr_link_dlg.h
 	)
 	
 SET(OVQT_PLUGIN_GUI_EDITOR_UIS
@@ -51,6 +53,8 @@ SET(OVQT_PLUGIN_GUI_EDITOR_UIS
 	add_widget_widget.ui
 	action_list.ui
 	texture_chooser.ui
+	expression_editor.ui
+	expr_link_dlg.ui
 	)
 
 SET(QT_USE_QTGUI TRUE)

code/studio/src/plugins/gui_editor/expr_link_dlg.cpp

@@ -0,0 +1,124 @@
+// Ryzom Core Studio - GUI Editor Plugin
+//
+// Copyright (C) 2014 Laszlo Kis-Adam
+// Copyright (C) 2010 Ryzom Core <http://ryzomcore.org/>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+#include "expr_link_dlg.h"
+#include <QMessageBox>
+
+ExprLinkDlg::ExprLinkDlg( QWidget *parent ) :
+QDialog( parent )
+{
+	m_ui.setupUi( this );
+
+	connect( m_ui.okButton, SIGNAL( clicked( bool ) ), this, SLOT( onOKClicked() ) );
+	connect( m_ui.cancelButton, SIGNAL( clicked( bool ) ), this, SLOT( onCancelClicked() ) );
+}
+
+ExprLinkDlg::~ExprLinkDlg()
+{
+}
+
+void ExprLinkDlg::load( const QList< SlotInfo > &a, const QList< SlotInfo > &b, const QString &aname, const QString &bname )
+{
+	QListIterator< SlotInfo > itra( a );
+	QListIterator< SlotInfo > itrb( b );
+
+	while( itra.hasNext() )
+	{
+		const SlotInfo &info = itra.next();
+
+		QListWidgetItem *item = new QListWidgetItem();
+		item->setText( info.name );
+		item->setData( Qt::UserRole, info.slot );
+
+		m_ui.list1->addItem( item );
+	}
+
+	while( itrb.hasNext() )
+	{
+		const SlotInfo &info = itrb.next();
+
+		QListWidgetItem *item = new QListWidgetItem();
+		item->setText( info.name );
+		item->setData( Qt::UserRole, info.slot );
+
+		m_ui.list2->addItem( item );
+	}
+
+	m_ui.groupBox1->setTitle( aname );
+	m_ui.groupBox2->setTitle( bname );
+}
+
+int ExprLinkDlg::getSlotA() const
+{
+	QListWidgetItem *item = m_ui.list1->currentItem();
+	if( item == NULL )
+		return -1;
+
+	int slot = item->data( Qt::UserRole ).toInt();
+	return slot;
+}
+
+int ExprLinkDlg::getSlotB() const
+{
+	QListWidgetItem *item = m_ui.list2->currentItem();
+	if( item == NULL )
+		return -1;
+
+	int slot = item->data( Qt::UserRole ).toInt();
+	return slot;
+}
+
+void ExprLinkDlg::onOKClicked()
+{
+	int slotA = getSlotA();
+	int slotB = getSlotB();
+
+	if( ( slotA == -1 ) || ( slotB == -1 ) )
+	{
+		QMessageBox::information( this,
+									tr( "No slots selected" ),
+									tr( "You need to select a slot on both sides." ) );
+		return;
+	}
+
+	if( ( slotA == 0 ) && ( slotB == 0 ) )
+	{
+		QMessageBox::information( this,
+									tr( "Wrong slots selected" ),
+									tr( "You can only select the 'Out' slot on one of the sides." ) );
+		return;
+	}
+
+	if( ( slotA != 0 ) && ( slotB != 0 ) )
+	{
+		QMessageBox::information( this,
+									tr( "Wrong slots selected" ),
+									tr( "One of the slots selected must be the 'Out' slot!" ) );
+		return;
+	}
+
+	accept();
+}
+
+void ExprLinkDlg::onCancelClicked()
+{
+	reject();
+}
+
+

code/studio/src/plugins/gui_editor/expr_link_dlg.h

@@ -0,0 +1,49 @@
+// Ryzom Core Studio - GUI Editor Plugin
+//
+// Copyright (C) 2014 Laszlo Kis-Adam
+// Copyright (C) 2010 Ryzom Core <http://ryzomcore.org/>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+#ifndef EXPR_LINK_DLG
+#define EXPR_LINK_DLG
+
+#include <QDialog>
+#include <QList>
+#include "ui_expr_link_dlg.h"
+#include "expr_slot_info.h"
+
+class ExprLinkDlg : public QDialog
+{
+	Q_OBJECT
+public:
+	ExprLinkDlg( QWidget *parent = NULL );
+	~ExprLinkDlg();
+
+	void load( const QList< SlotInfo > &a, const QList< SlotInfo > &b, const QString &aname, const QString &bname );
+
+	int getSlotA() const;
+	int getSlotB() const;
+
+private Q_SLOTS:
+	void onOKClicked();
+	void onCancelClicked();
+
+private:
+	Ui::ExprLinkDialog m_ui;
+};
+
+#endif
+

code/studio/src/plugins/gui_editor/expr_link_dlg.ui

@@ -0,0 +1,76 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>ExprLinkDialog</class>
+ <widget class="QDialog" name="ExprLinkDialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>641</width>
+    <height>334</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Linking nodes</string>
+  </property>
+  <layout class="QGridLayout" name="gridLayout_3">
+   <item row="0" column="0" colspan="3">
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QGroupBox" name="groupBox1">
+       <property name="title">
+        <string>GroupBox</string>
+       </property>
+       <layout class="QGridLayout" name="gridLayout">
+        <item row="0" column="0">
+         <widget class="QListWidget" name="list1"/>
+        </item>
+       </layout>
+      </widget>
+     </item>
+     <item>
+      <widget class="QGroupBox" name="groupBox2">
+       <property name="title">
+        <string>GroupBox</string>
+       </property>
+       <layout class="QGridLayout" name="gridLayout_2">
+        <item row="0" column="0">
+         <widget class="QListWidget" name="list2"/>
+        </item>
+       </layout>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item row="1" column="0">
+    <spacer name="horizontalSpacer">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>398</width>
+       <height>20</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
+   <item row="1" column="1">
+    <widget class="QPushButton" name="okButton">
+     <property name="text">
+      <string>Ok</string>
+     </property>
+    </widget>
+   </item>
+   <item row="1" column="2">
+    <widget class="QPushButton" name="cancelButton">
+     <property name="text">
+      <string>Cancel</string>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

code/studio/src/plugins/gui_editor/expr_slot_info.h

@@ -0,0 +1,32 @@
+// Ryzom Core Studio - GUI Editor Plugin
+//
+// Copyright (C) 2014 Laszlo Kis-Adam
+// Copyright (C) 2010 Ryzom Core <http://ryzomcore.org/>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+#ifndef EXPR_SLOT_INFO
+#define EXPR_SLOT_INFO
+
+#include <QString>
+
+struct SlotInfo
+{
+	QString name;
+	int slot;
+};
+
+#endif
+

code/studio/src/plugins/gui_editor/expression_editor.cpp

@@ -0,0 +1,377 @@
+// Ryzom Core Studio - GUI Editor Plugin
+//
+// Copyright (C) 2014 Laszlo Kis-Adam
+// Copyright (C) 2010 Ryzom Core <http://ryzomcore.org/>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+#include "expression_editor.h"
+#include <QGraphicsScene>
+#include <QGraphicsItem>
+#include <QMenu>
+#include <qevent.h>
+
+#include "expression_node.h"
+#include "expression_link.h"
+#include "expr_link_dlg.h"
+#include "expression_store.h"
+#include "expression_info.h"
+
+#include <QMessageBox>
+#include <QInputDialog>
+
+class ExpressionEditorPvt
+{
+public:
+
+	ExpressionEditorPvt()
+	{
+		m_root = NULL;
+	}
+
+	ExpressionStore store;
+	ExpressionNode *m_root;
+};
+
+ExpressionEditor::ExpressionEditor( QWidget *parent ) :
+QMainWindow( parent )
+{
+	m_ui.setupUi( this );
+
+	m_pvt = new ExpressionEditorPvt();
+	
+	m_selectionCount = 0;
+
+	m_scene = new QGraphicsScene( this );
+	m_ui.view->setScene( m_scene );
+
+	connect( m_scene, SIGNAL( selectionChanged() ), this, SLOT( onSelectionChanged() ) );
+	connect( m_ui.tree, SIGNAL( itemDoubleClicked( QTreeWidgetItem*, int ) ), this, SLOT( onItemDblClicked( QTreeWidgetItem* ) ) );
+
+	m_nodeCount = 0;
+}
+
+ExpressionEditor::~ExpressionEditor()
+{
+	delete m_pvt;
+	m_pvt = NULL;
+	m_scene = NULL;
+}
+
+void ExpressionEditor::load()
+{
+	m_pvt->store.load();
+
+	QList< const ExpressionInfo* > l;
+	m_pvt->store.getExpressions( l );
+
+	QListIterator< const ExpressionInfo* > itr( l );
+	while( itr.hasNext() )
+	{
+		addExpression( itr.next() );
+	}
+
+	l.clear();
+}
+
+void ExpressionEditor::contextMenuEvent( QContextMenuEvent *e )
+{	
+	QMenu menu;
+	QAction *a = NULL;
+
+	if( m_selectionCount > 0 )
+	{
+		a = menu.addAction( "Remove" );
+		connect( a, SIGNAL( triggered() ), this, SLOT( onDeleteSelection() ) );
+
+		if( m_selectionCount == 1 )
+		{
+			QList< QGraphicsItem* > l = m_scene->selectedItems();
+			ExpressionNode *node = dynamic_cast< ExpressionNode* >( l[ 0 ] );
+			if( node != NULL )
+			{
+				if( node->variable() )
+				{
+					a = menu.addAction( "Change slot count" );
+					connect( a, SIGNAL( triggered() ), this, SLOT( onChangeSlotCount() ) );
+				}
+				else
+				if( node->isValue() )
+				{
+					a = menu.addAction( "Change value" );
+					connect( a, SIGNAL( triggered() ), this, SLOT( onChangeValue() ) );
+				}
+
+				a = menu.addAction( "Set as root" );
+				connect( a, SIGNAL( triggered() ), this, SLOT( onSetRoot() ) );
+			}
+		}
+		else
+		if( m_selectionCount == 2 )
+		{
+			a = menu.addAction( "Link" );
+			connect( a, SIGNAL( triggered() ), this, SLOT( onLinkItems() ) );
+		}
+
+		a = menu.addAction( "Unlink" );
+		connect( a, SIGNAL( triggered() ), this, SLOT( onUnLinkItems() ) );
+	}
+	else
+	{
+		a = menu.addAction( "Build expression" );
+		connect( a, SIGNAL( triggered() ), this, SLOT( onBuildExpression() ) );
+
+		a = menu.addAction( "Save" );
+		connect( a, SIGNAL( triggered() ), this, SLOT( onSave() ) );
+
+		a = menu.addAction( "Clear" );
+		connect( a, SIGNAL( triggered() ), this, SLOT( onClear() ) );
+	}
+
+	menu.exec( e->globalPos() );
+}
+
+void ExpressionEditor::closeEvent( QCloseEvent *e )
+{
+	QMainWindow::closeEvent( e );
+
+	Q_EMIT closing();
+}
+
+void ExpressionEditor::onDeleteSelection()
+{
+	QList< QGraphicsItem* > l = m_scene->selectedItems();
+	QListIterator< QGraphicsItem* > itr( l );
+	while( itr.hasNext() )
+	{
+		QGraphicsItem *item = itr.next();
+
+		ExpressionNode *node = dynamic_cast< ExpressionNode* >( item );
+		if( node != NULL )		
+		{
+			ExpressionLink *link = NULL;
+
+			int c = node->slotCount();
+			for( int i = 0; i < c; i++ )
+			{
+				link = node->link( i );
+				if( link != NULL )
+				{
+					link->unlink();
+					m_scene->removeItem( link );
+					delete link;
+				}
+			}
+		}
+
+		m_scene->removeItem( item );
+		delete item;
+	}
+}
+
+void ExpressionEditor::onSelectionChanged()
+{
+	QList< QGraphicsItem* > l = m_scene->selectedItems();
+	m_selectionCount = l.count();
+}
+
+void ExpressionEditor::onLinkItems()
+{
+	QList< QGraphicsItem* > l = m_scene->selectedItems();
+	ExpressionNode *from = static_cast< ExpressionNode* >( l[ 0 ] );
+	ExpressionNode *to = static_cast< ExpressionNode* >( l[ 1 ] );
+
+	QList< SlotInfo > froml;
+	QList< SlotInfo > tol;
+
+	from->getSlots( froml );
+	to->getSlots( tol );
+
+	// If there are no free slots, or both "Out" slots are taken we can't link
+	if( froml.isEmpty() || tol.isEmpty() || ( !from->slotEmpty( 0 ) && !to->slotEmpty( 0 ) ) )
+	{
+		QMessageBox::information( this,
+									tr( "Failed to link nodes" ),
+									tr( "Unfortunately those nodes are full." ) );
+		return;
+	}
+
+	ExprLinkDlg d;
+	d.load( froml, tol, from->name(), to->name() );
+	int result = d.exec();
+	if( result == QDialog::Rejected )
+		return;
+
+	int slotA = d.getSlotA();
+	int slotB = d.getSlotB();
+
+	ExpressionLink *link = new ExpressionLink();
+	link->link( from, to, slotA, slotB );
+
+	m_scene->addItem( link );
+}
+
+void ExpressionEditor::onUnLinkItems()
+{
+	QList< QGraphicsItem* > l = m_scene->selectedItems();
+
+	for( int i = 0; i < l.count(); i++ )
+	{
+		ExpressionNode *node = dynamic_cast< ExpressionNode* >( l[ i ] );
+		if( node == NULL )
+			continue;
+
+		node->clearLinks();
+	}
+}
+
+void ExpressionEditor::onItemDblClicked( QTreeWidgetItem *item )
+{
+	QString name = item->text( 0 );
+
+	const ExpressionInfo *info = m_pvt->store.getInfo( name );
+
+	QString n = name;
+	n += " #";
+	n += QString::number( m_nodeCount );
+	m_nodeCount++;
+
+	ExpressionNode *node = new ExpressionNode( n, info->slotNames.count() );
+	node->setSlotNames( info->slotNames );
+	node->setVariable( info->variable );
+	node->setIsValue( info->value );
+	if( node->isValue() )
+	{
+		node->setValue( "Value" );
+	}
+	m_scene->addItem( node );
+}
+
+void ExpressionEditor::onChangeSlotCount()
+{
+	QList< QGraphicsItem* > l = m_scene->selectedItems();
+	ExpressionNode *node = static_cast< ExpressionNode* >( l[ 0 ] );
+	int oldc = node->slotCount();
+
+	int c = QInputDialog::getInt( this,
+								tr( "Change slot count" ),
+								tr( "Enter new slot count" ),
+								oldc,
+								1,
+								26 );
+
+	if( oldc == c )
+		return;
+
+	node->changeSlotCount( c );
+}
+
+void ExpressionEditor::onChangeValue()
+{
+	QList< QGraphicsItem* > l = m_scene->selectedItems();
+	ExpressionNode *node = static_cast< ExpressionNode* >( l[ 0 ] );
+
+	QString oldValue = node->getValue();
+
+	QString newValue = QInputDialog::getText( this,
+										tr( "Change value" ),
+										tr( "Enter new value" ),
+										QLineEdit::Normal,
+										oldValue );
+
+	if( newValue.isEmpty() )
+		return;
+	if( newValue == oldValue )
+		return;
+
+	node->setValue( newValue );
+}
+
+void ExpressionEditor::onSetRoot()
+{
+	QList< QGraphicsItem* > l = m_scene->selectedItems();
+	ExpressionNode *node = static_cast< ExpressionNode* >( l[ 0 ] );
+
+	if( m_pvt->m_root != NULL )
+		m_pvt->m_root->setRoot( false );
+
+	m_pvt->m_root = node;
+	node->setRoot( true );
+}
+
+void ExpressionEditor::onBuildExpression()
+{
+	if( m_pvt->m_root == NULL )
+	{
+		QMessageBox::information( this,
+									tr( "Building expression" ),
+									tr( "Failed to build expression: You must set a root node." ) );
+		return;
+	}
+
+	QString result = m_pvt->m_root->build();
+	QMessageBox::information( this,
+								tr( "Building expression" ),
+								tr( "The result is\n" ) + result  );
+}
+
+void ExpressionEditor::onSave()
+{
+	if( m_pvt->m_root != NULL )
+	{
+		m_result = m_pvt->m_root->build();
+	}
+
+	close();
+}
+
+void ExpressionEditor::onClear()
+{
+	m_scene->clear();
+	m_pvt->m_root = NULL;
+	m_nodeCount = 0;
+	m_selectionCount = 0;
+	m_result = "";
+}
+
+
+void ExpressionEditor::addExpression( const ExpressionInfo *info )
+{
+	QTreeWidgetItem *item = findTopLevelItem( info->category );
+	if( item == NULL )
+	{
+		item = new QTreeWidgetItem();
+		item->setText( 0, info->category );
+		m_ui.tree->addTopLevelItem( item );
+	}
+
+	QTreeWidgetItem *citem = new QTreeWidgetItem();
+	citem->setText( 0, info->name );
+	item->addChild( citem );
+}
+
+QTreeWidgetItem* ExpressionEditor::findTopLevelItem( const QString &text )
+{
+	int c = m_ui.tree->topLevelItemCount();
+	for( int i = 0; i < c; i++ )
+	{
+		QTreeWidgetItem *item = m_ui.tree->topLevelItem( i );
+		if( item->text( 0 ) == text )
+			return item;
+	}
+
+	return NULL;
+}
+

code/studio/src/plugins/gui_editor/expression_editor.h

@@ -0,0 +1,75 @@
+// Ryzom Core Studio - GUI Editor Plugin
+//
+// Copyright (C) 2014 Laszlo Kis-Adam
+// Copyright (C) 2010 Ryzom Core <http://ryzomcore.org/>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+#ifndef EXPRESSION_EDITOR
+#define EXPRESSION_EDITOR
+
+#include "ui_expression_editor.h"
+
+class QGraphicsScene;
+class QGraphicsItem;
+class ExpressionEditorPvt;
+class ExpressionInfo;
+
+class ExpressionEditor : public QMainWindow
+{
+	Q_OBJECT
+public:
+	ExpressionEditor( QWidget *parent = NULL );
+	~ExpressionEditor();
+
+	void load();
+	QString result() const{ return m_result; }
+
+Q_SIGNALS:
+	void closing();
+
+protected:
+	void contextMenuEvent( QContextMenuEvent *e );
+	void closeEvent( QCloseEvent *e );
+
+private Q_SLOTS:
+	void onDeleteSelection();
+	void onSelectionChanged();
+	void onLinkItems();
+	void onUnLinkItems();
+	void onItemDblClicked( QTreeWidgetItem *item );
+	void onChangeSlotCount();
+	void onChangeValue();
+	void onSetRoot();
+	void onBuildExpression();
+	void onSave();
+	void onClear();
+
+private:
+	void addExpression( const ExpressionInfo *info );
+	QTreeWidgetItem* findTopLevelItem( const QString &text );
+
+	Ui::ExpressionEditor m_ui;
+	QGraphicsScene *m_scene;
+
+	int m_selectionCount;
+	int m_nodeCount;
+
+	ExpressionEditorPvt *m_pvt;
+	QString m_result;
+};
+
+#endif
+

code/studio/src/plugins/gui_editor/expression_editor.ui

@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>ExpressionEditor</class>
+ <widget class="QMainWindow" name="ExpressionEditor">
+  <property name="windowModality">
+   <enum>Qt::ApplicationModal</enum>
+  </property>
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>800</width>
+    <height>600</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Expression Editor</string>
+  </property>
+  <widget class="QWidget" name="centralwidget">
+   <layout class="QGridLayout" name="gridLayout_2">
+    <item row="0" column="0">
+     <widget class="QGraphicsView" name="view"/>
+    </item>
+   </layout>
+  </widget>
+  <widget class="QMenuBar" name="menubar">
+   <property name="geometry">
+    <rect>
+     <x>0</x>
+     <y>0</y>
+     <width>800</width>
+     <height>21</height>
+    </rect>
+   </property>
+  </widget>
+  <widget class="QStatusBar" name="statusbar"/>
+  <widget class="QDockWidget" name="dockWidget">
+   <attribute name="dockWidgetArea">
+    <number>1</number>
+   </attribute>
+   <widget class="QWidget" name="dockWidgetContents">
+    <layout class="QGridLayout" name="gridLayout">
+     <item row="0" column="0">
+      <widget class="QTreeWidget" name="tree">
+       <column>
+        <property name="text">
+         <string>Expressions</string>
+        </property>
+       </column>
+      </widget>
+     </item>
+    </layout>
+   </widget>
+  </widget>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

code/studio/src/plugins/gui_editor/expression_info.h

@@ -0,0 +1,41 @@
+// Ryzom Core Studio - GUI Editor Plugin
+//
+// Copyright (C) 2014 Laszlo Kis-Adam
+// Copyright (C) 2010 Ryzom Core <http://ryzomcore.org/>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef EXPRESSION_INFO
+#define EXPRESSION_INFO
+
+#include <QString>
+#include <QStringList>
+
+struct ExpressionInfo
+{
+	QString name;
+	bool value;
+	QString category;
+	bool variable;
+	QStringList slotNames;
+
+	ExpressionInfo()
+	{
+		value = false;
+		variable = false;
+	}
+};
+
+#endif
+

code/studio/src/plugins/gui_editor/expression_link.cpp

@@ -0,0 +1,78 @@
+// Ryzom Core Studio - GUI Editor Plugin
+//
+// Copyright (C) 2014 Laszlo Kis-Adam
+// Copyright (C) 2010 Ryzom Core <http://ryzomcore.org/>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "expression_link.h"
+#include "expression_node.h"
+#include <QGraphicsItem>
+#include <QPen>
+
+ExpressionLink::ExpressionLink( QGraphicsItem *parent ) :
+QGraphicsLineItem( parent )
+{
+	m_from = NULL;
+	m_to = NULL;
+}
+
+ExpressionLink::~ExpressionLink()
+{
+	unlink();
+}
+
+void ExpressionLink::link( ExpressionNode *from, ExpressionNode *to, int fromSlot, int toSlot )
+{
+	m_from = from;
+	m_to = to;
+	m_from->setLink( this, fromSlot );
+	m_to->setLink( this, toSlot );
+
+	m_fromSlot = fromSlot;
+	m_toSlot = toSlot;
+
+	nodeMoved();
+}
+
+void ExpressionLink::unlink()
+{
+	if( m_from == NULL )
+		return;
+
+	m_from->setLink( NULL, m_fromSlot );
+	m_to->setLink( NULL, m_toSlot );
+
+	m_from = NULL;
+	m_to = NULL;
+
+	delete this;
+}
+
+void ExpressionLink::nodeMoved()
+{
+	setLine( QLineF( m_from->slotPos( m_fromSlot ), m_to->slotPos( m_toSlot ) ) );
+}
+
+void ExpressionLink::paint( QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget )
+{
+	QPen p;
+	p.setColor( Qt::black );
+	p.setWidth( 5 );
+	setPen( p );
+
+	QGraphicsLineItem::paint( painter, option, widget );
+}
+
+

code/studio/src/plugins/gui_editor/expression_link.h

@@ -0,0 +1,51 @@
+// Ryzom Core Studio - GUI Editor Plugin
+//
+// Copyright (C) 2014 Laszlo Kis-Adam
+// Copyright (C) 2010 Ryzom Core <http://ryzomcore.org/>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef EXPRESSION_LINK
+#define EXPRESSION_LINK
+
+#include <QGraphicsItem>
+
+class ExpressionNode;
+
+class ExpressionLink : public QGraphicsLineItem
+{
+public:
+	ExpressionLink( QGraphicsItem *parent = NULL );
+	~ExpressionLink();
+
+	void link( ExpressionNode *from, ExpressionNode *to, int fromSlot, int toSlot );
+	void unlink();
+
+	void nodeMoved();
+
+	void paint( QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget );
+
+	ExpressionNode* from() const{ return m_from; }
+	ExpressionNode* to() const{ return m_to; }
+
+private:
+	ExpressionNode *m_from;
+	ExpressionNode *m_to;
+
+	int m_fromSlot;
+	int m_toSlot;
+};
+
+#endif
+

code/studio/src/plugins/gui_editor/expression_loader.cpp

@@ -0,0 +1,220 @@
+// Ryzom Core Studio - GUI Editor Plugin
+//
+// Copyright (C) 2014 Laszlo Kis-Adam
+// Copyright (C) 2010 Ryzom Core <http://ryzomcore.org/>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "expression_loader.h"
+#include "expression_info.h"
+
+#include <QFile>
+#include <QXmlStreamReader>
+
+class ExpressionLoaderPvt
+{
+public:
+
+	bool parseName()
+	{
+		QString text = reader.readElementText( QXmlStreamReader::ErrorOnUnexpectedElement );
+		if( reader.hasError() )
+			return false;
+
+		m_info->name = text;
+
+		return true;
+	}
+
+	bool parseValue()
+	{
+		QString text = reader.readElementText( QXmlStreamReader::ErrorOnUnexpectedElement );
+		if( reader.hasError() )
+			return false;
+
+		if( text.toLower() == "true" )
+			m_info->value = true;
+		else
+			m_info->value = false;
+
+		return true;
+	}
+
+	bool parseCategory()
+	{
+		QString text = reader.readElementText( QXmlStreamReader::ErrorOnUnexpectedElement );
+		if( reader.hasError() )
+			return false;
+
+		m_info->category = text;
+
+		return true;
+	}
+
+	bool parseVariable()
+	{
+		QString text = reader.readElementText( QXmlStreamReader::ErrorOnUnexpectedElement );
+		if( reader.hasError() )
+			return false;
+
+		if( text.toLower() == "true" )
+			m_info->variable = true;
+		else
+			m_info->variable = false;
+
+		return true;
+	}
+
+	bool parseSlot()
+	{
+		QString text = reader.readElementText( QXmlStreamReader::ErrorOnUnexpectedElement );
+		if( reader.hasError() )
+			return false;
+
+		m_info->slotNames.push_back( text );
+
+		return true;
+	}
+
+	bool parseSlots()
+	{
+		bool error = false;
+
+		while( !reader.atEnd() )
+		{
+			reader.readNext();
+
+			if( reader.isStartElement() )
+			{
+				QString name = reader.name().toString();
+				if( name == "slot" )
+					error = !parseSlot();
+			}
+			else
+			if( reader.isEndElement() )
+			{
+				if( reader.name() == "slots" )
+					break;
+			}
+		}
+
+		if( reader.atEnd() )
+			return false;
+
+		return true;
+	}
+
+	bool load( QFile *f )
+	{
+		reader.clear();
+		reader.setDevice( f );
+
+		bool error = false;
+
+		// start of document
+		reader.readNext();
+		if( reader.atEnd() )
+			return false;
+
+		// root node
+		reader.readNext();
+		if( reader.atEnd() )
+			return false;
+
+		if( reader.isStartElement() )
+		{
+			// Not an expression file?
+			if( reader.name() != "expression" )
+				return false;
+		}
+
+		while( !reader.atEnd() )
+		{
+			reader.readNext();
+
+			if( reader.isStartElement() )
+			{
+				QString name = reader.name().toString();
+
+				if( name == "name" )
+					error = !parseName();
+				else
+				if( name == "value" )
+					error = !parseValue();
+				else
+				if( name == "category" )
+					error = !parseCategory();
+				else
+				if( name == "variable" )
+					error = !parseVariable();
+				else
+				if( name == "slots" )
+					error = !parseSlots();
+			}
+
+			if( error )
+				break;
+		}
+
+		if( error || reader.hasError() )
+		{
+			return false;
+		}
+
+		return true;
+	}
+
+	void setInfo( ExpressionInfo *info ){ m_info = info; }
+
+private:
+	QXmlStreamReader reader;
+	ExpressionInfo *m_info;
+};
+
+ExpressionLoader::ExpressionLoader()
+{
+	m_pvt = new ExpressionLoaderPvt;
+}
+
+ExpressionLoader::~ExpressionLoader()
+{
+	delete m_pvt;
+	m_pvt = NULL;
+}
+
+ExpressionInfo* ExpressionLoader::load( const QString &filename )
+{
+	ExpressionInfo *info = NULL;
+	bool ok = false;
+
+	QFile f( filename );
+	if( !f.open( QIODevice::ReadOnly | QIODevice::Text ) )
+		return NULL;
+
+	info = new ExpressionInfo();
+	m_pvt->setInfo( info );
+	ok = m_pvt->load( &f );
+
+	f.close();
+
+	if( !ok )
+	{
+		delete info;
+		info = NULL;
+	}
+
+	return info;
+}
+
+

code/studio/src/plugins/gui_editor/expression_loader.h

@@ -0,0 +1,39 @@
+// Ryzom Core Studio - GUI Editor Plugin
+//
+// Copyright (C) 2014 Laszlo Kis-Adam
+// Copyright (C) 2010 Ryzom Core <http://ryzomcore.org/>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef EXPRESSION_LOADER
+#define EXPRESSION_LOADER
+
+struct ExpressionInfo;
+class QString;
+class ExpressionLoaderPvt;
+
+class ExpressionLoader
+{
+public:
+	ExpressionLoader();
+	~ExpressionLoader();
+
+	ExpressionInfo* load( const QString &filename );
+
+private:
+	ExpressionLoaderPvt *m_pvt;
+};
+
+#endif
+

code/studio/src/plugins/gui_editor/expression_node.cpp

@@ -0,0 +1,410 @@
+// Ryzom Core Studio - GUI Editor Plugin
+//
+// Copyright (C) 2014 Laszlo Kis-Adam
+// Copyright (C) 2010 Ryzom Core <http://ryzomcore.org/>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+#include "expression_node.h"
+#include "expression_link.h"
+#include <QPainter>
+#include <QStyleOption>
+
+struct NodeSlotInfo
+{
+	// top-left
+	QPoint tl;
+
+	// text top-left
+	QPoint ttl;
+
+	// The text displayed
+	QString text;
+
+	// text width
+	qreal tw;
+
+	// text height
+	qreal th;
+
+	// width-height of the box
+	qreal wh;
+};
+
+class NodeSlot
+{
+public:
+	NodeSlot( const NodeSlotInfo &info )
+	{
+		m_info = info;
+	}
+
+	~NodeSlot()
+	{
+	}
+
+	QPointF pos() const{
+		QPointF p;		
+		p.setX( m_info.tl.x() + m_info.wh / 2.0 );
+		p.setY( m_info.tl.y() + m_info.wh / 2.0 );
+
+		return p;
+	}
+
+	void paint( QPainter *painter )
+	{
+		QBrush boxBrush;
+		QPen p;
+		
+		boxBrush.setColor( Qt::black );
+		boxBrush.setStyle( Qt::SolidPattern );
+		p.setColor( Qt::black );
+		painter->setPen( p );
+
+		QRectF box;
+		QRectF tbox;
+		
+		box.setTopLeft( m_info.tl );
+		box.setHeight( m_info.wh );
+		box.setWidth( m_info.wh );
+
+		painter->fillRect( box, boxBrush );
+
+		tbox.setTopLeft( m_info.ttl );
+		tbox.setHeight( m_info.th );
+		tbox.setWidth( m_info.tw );
+
+		painter->drawText( tbox, Qt::AlignRight, m_info.text );
+	}
+
+	QString text() const{ return m_info.text; }
+	void setText( const QString &text ){ m_info.text = text; }
+
+private:
+	NodeSlotInfo m_info;
+};
+
+
+
+ExpressionNode::ExpressionNode( const QString &name, int slotCount, QGraphicsItem *parent ) :
+QGraphicsItem( parent )
+{
+	setFlags( QGraphicsItem::ItemIsSelectable | QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemSendsScenePositionChanges );
+
+	m_w = 100;
+	m_h = 100;
+	m_hh = 20.0;
+
+	m_variable = false;
+	m_isValue = false;
+	m_isRoot = false;
+
+	m_name = name;
+
+	if( slotCount > 3 )
+		m_h = m_h + 20.0 * ( slotCount - 3 );
+
+	createSlots( slotCount );
+}
+
+ExpressionNode::~ExpressionNode()
+{
+	clearLinks();
+	clearSlots();
+}
+
+QRectF ExpressionNode::boundingRect() const
+{
+	return QRectF( 0, 0, m_w, m_h );
+}
+
+void ExpressionNode::paint( QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget )
+{
+	QBrush br;
+	QBrush boxBrush;
+	QPen p;
+	QColor c;
+
+	QRectF rect = boundingRect();
+	QRectF header = rect;
+	header.setHeight( m_hh );
+
+	// Draw filled rectangle, header
+	if( !m_isRoot )
+	{
+		c.setRed( 44 );
+		c.setGreen( 169 );
+		c.setBlue( 232 );
+	}
+	else
+	{
+		c.setRed( 255 );
+		c.setGreen( 0 );
+		c.setBlue( 0 );
+	}
+	br.setColor( c );
+	br.setStyle( Qt::SolidPattern );
+	p.setColor( c );
+	painter->setPen( p );
+	painter->fillRect( header, br );
+
+	// Draw header text
+	p.setColor( Qt::black );
+	painter->setPen( p );
+	painter->drawText( header, Qt::AlignCenter, m_name );
+
+	// Draw value if applicable
+	if( m_isValue )
+	{
+		QRectF vbox;
+		vbox.setTopLeft( QPoint( 0.0, 20.0 ) );
+		vbox.setWidth( header.width() );
+		vbox.setHeight( header.height() );
+		QPen vpen;
+		vpen.setColor( Qt::red );
+		painter->setPen( vpen );
+		painter->drawText( vbox, Qt::AlignCenter, m_value );
+		painter->setPen( p );
+	}
+
+	if( option->state & QStyle::State_Selected )
+	{
+		p.setStyle( Qt::DotLine );
+		p.setColor( Qt::red );
+	}
+
+	// Draw outline of the entire thing + header
+	painter->setPen( p );
+	painter->drawRect( rect );
+	painter->drawRect( header );
+
+	paintSlots( painter );
+}
+
+
+QPointF ExpressionNode::slotPos( int slot ) const
+{
+	const NodeSlot *s = m_slots[ slot ];
+	QPointF sp = s->pos();
+	QPointF mp = pos();
+
+	mp += sp;
+	return mp;
+}
+
+void ExpressionNode::changeSlotCount( int count )
+{
+	clearSlots();
+	clearLinks();
+	m_links.clear();
+
+	if( count <= 3 )
+		m_h = 100.0;
+	else
+		m_h = 100.0 + 20.0 * ( count - 3 );
+
+	createSlots( count );
+
+	update();
+}
+
+void ExpressionNode::clearSlots()
+{
+	qDeleteAll( m_slots );
+	m_slots.clear();
+}
+
+bool ExpressionNode::slotEmpty( int slot ) const
+{
+	if( m_links[ 0 ] == NULL )
+		return true;
+	else
+		return false;
+}
+
+void ExpressionNode::getSlots( QList< SlotInfo > &l )
+{
+	SlotInfo info;
+
+	for( int i = 0; i < m_slots.count(); i++ )
+	{
+		if( m_links[ i ] != NULL )
+			continue;
+
+		info.name = m_slots[ i ]->text();
+		info.slot = i;
+		l.push_back( info );
+	}
+}
+
+void ExpressionNode::setLink( ExpressionLink *link, int slot )
+{
+	m_links[ slot ] = link;
+}
+
+ExpressionLink* ExpressionNode::link( int slot ) const
+{
+	return m_links[ slot ];
+}
+
+void ExpressionNode::setSlotNames( const QList< QString > &l )
+{
+	int c = l.count();
+	for( int i = 0; i < c; i++ )
+	{
+		// "Out" slot is at position 0, so set the names with an offset of 1
+		m_slots[ i + 1 ]->setText( l[ i ] );
+	}
+}
+
+void ExpressionNode::setValue( const QString &value )
+{
+	m_value = value;
+
+	int c = m_value.count();
+	if( c < 15 )
+		m_w = 100.0;
+	else
+		m_w = m_w + ( 100.0 / 15.0 ) * ( c - 15.0 );
+
+	update();
+}
+
+void ExpressionNode::setRoot( bool b )
+{
+	m_isRoot = b;
+	update();
+}
+
+QString ExpressionNode::build() const
+{
+	QString result;
+
+	if( isValue() )
+		return m_value;
+
+	QStringList l = m_name.split( ' ' );
+	result = l[ 0 ];
+	result += "( ";
+
+	int c = m_links.count();
+	for( int i = 1; i < c; i++ )
+	{
+		ExpressionLink *link = m_links[ i ];
+		if( link == NULL )
+			continue;
+
+		ExpressionNode *node = NULL;
+
+		if( link->from() == this )
+			node = link->to();
+		else
+			node = link->from();
+
+		result += node->build();
+
+		if( i != ( c - 1 ) )
+			result += ", ";
+	}
+
+	result += " )";
+	return result;
+}
+
+QVariant ExpressionNode::itemChange( GraphicsItemChange change, const QVariant &value )
+{
+	if( change == ItemScenePositionHasChanged )
+	{
+		onNodeMove();
+	}
+
+	return QGraphicsItem::itemChange( change, value );
+}
+
+void ExpressionNode::onNodeMove()
+{
+	for( int i = 0; i < m_links.count(); i++ )
+	{
+		ExpressionLink *link = m_links[ i ];
+		if( link == NULL )
+			continue;
+
+		link->nodeMoved();
+	}
+}
+
+void ExpressionNode::createSlots( int count)
+{
+	// Out nodes
+	m_links.push_back( NULL );
+
+	for( int i = 0; i < count; i++ )
+		m_links.push_back( NULL );
+	
+	// First create the "Out" slot
+	NodeSlotInfo info;
+	info.tw = 25.0;
+	info.th = 12.0;
+	info.wh = 10.0;
+
+	qreal x = 0.0;
+	qreal y = m_h * 0.5;
+	qreal tx = info.wh;
+	qreal ty = m_h * 0.5 - 2;
+
+	info.tl = QPoint( x, y );
+	info.ttl = QPoint( tx, ty );
+	info.text = "Out";
+
+	m_slots.push_back( new NodeSlot( info ) );
+
+	// Then the rest of them
+	for( int i = 0; i < count; i++ )
+	{
+		x = m_w - info.wh;
+		y = 30 + i * 20.0;
+		tx = x - 5 - info.tw;
+		ty = y - 2;
+
+		info.tl = QPoint( x, y );
+		info.ttl = QPoint( tx, ty );
+		info.text = QString( 'A' + i );
+
+		m_slots.push_back( new NodeSlot( info ) );
+	}
+}
+
+void ExpressionNode::paintSlots( QPainter *painter )
+{
+	for( int i = 0; i < m_slots.count(); i++ )
+	{
+		NodeSlot *slot = m_slots[ i ];
+		slot->paint( painter );
+	}
+}
+
+
+void ExpressionNode::clearLinks()
+{
+	for( int i = 0; i < m_links.count(); i++ )
+	{
+		ExpressionLink *link = m_links[ i ];
+		if( link == NULL )
+			continue;
+
+		link->unlink();
+	}
+}
+

code/studio/src/plugins/gui_editor/expression_node.h

@@ -0,0 +1,95 @@
+// Ryzom Core Studio - GUI Editor Plugin
+//
+// Copyright (C) 2014 Laszlo Kis-Adam
+// Copyright (C) 2010 Ryzom Core <http://ryzomcore.org/>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+#ifndef EXPRESSION_NODE
+#define EXPRESSION_NODE
+
+#include <QGraphicsItem>
+#include <QList>
+#include "expr_slot_info.h"
+
+class ExpressionLink;
+class NodeSlot;
+
+class ExpressionNode : public QGraphicsItem
+{
+public:
+	ExpressionNode( const QString &name, int slotCount = 3, QGraphicsItem *parent = NULL );
+	~ExpressionNode();
+
+	QRectF boundingRect() const;
+	void paint( QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget );
+
+	void setLink( ExpressionLink *link, int slot );
+	ExpressionLink* link( int slot ) const;
+
+	QPointF slotPos( int slot ) const;
+
+	int slotCount() const{ return m_slots.count(); }
+	void changeSlotCount( int count );
+	void clearSlots();
+
+	bool slotEmpty( int slot ) const;
+
+	void getSlots( QList< SlotInfo > &l );
+
+	void clearLinks();
+
+	QString name() const{ return m_name; }
+
+	void setSlotNames( const QList< QString > &l );
+
+	void setVariable( bool b ){ m_variable = b; }
+	bool variable() const{ return m_variable; }
+
+	void setValue( const QString &value );
+	QString getValue() const{ return m_value; }
+
+	bool isValue() const{ return m_isValue; }
+	void setIsValue( bool b ){ m_isValue = b; }
+	void setRoot( bool b );
+
+	QString build() const;
+
+protected:
+	QVariant itemChange( GraphicsItemChange change, const QVariant &value );
+
+private:
+	void onNodeMove();
+	void createSlots( int count = 3 );
+	void paintSlots( QPainter *painter );
+
+	qreal m_w; // node width
+	qreal m_h; // node height
+	qreal m_hh; // header height
+
+	QList< NodeSlot* > m_slots;
+	QList< ExpressionLink* > m_links;
+
+	QString m_name;
+
+	bool m_variable;
+
+	QString m_value;
+	bool m_isValue;
+	bool m_isRoot;
+};
+
+#endif
+

code/studio/src/plugins/gui_editor/expression_store.cpp

@@ -0,0 +1,105 @@
+// Ryzom Core Studio - GUI Editor Plugin
+//
+// Copyright (C) 2014 Laszlo Kis-Adam
+// Copyright (C) 2010 Ryzom Core <http://ryzomcore.org/>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#include "expression_store.h"
+#include "expression_info.h"
+#include "expression_loader.h"
+#include <QMap>
+#include <QDir>
+
+class ExpressionStorePvt
+{
+public:
+
+	~ExpressionStorePvt()
+	{
+		qDeleteAll( expressions );
+		expressions.clear();
+	}
+
+
+	QMap< QString, ExpressionInfo* > expressions;
+};
+
+ExpressionStore::ExpressionStore()
+{
+	m_pvt = new ExpressionStorePvt();
+}
+
+ExpressionStore::~ExpressionStore()
+{
+	delete m_pvt;
+	m_pvt = NULL;
+}
+
+
+bool ExpressionStore::load()
+{
+	QDir d( "expressions" );
+	if( !d.exists() )
+		return false;
+
+	QFileInfoList l = d.entryInfoList();
+	QListIterator< QFileInfo > itr( l );
+	if( !itr.hasNext() )
+		return false;
+
+	ExpressionLoader loader;
+
+	while( itr.hasNext() )
+	{
+		const QFileInfo &info = itr.next();
+		if( !info.isFile() )
+			continue;
+
+		if( info.suffix() != "xml" )
+			continue;
+
+		ExpressionInfo *expr = loader.load( info.absoluteFilePath() );
+		if( expr == NULL )
+			continue;
+
+		m_pvt->expressions[ expr->name ] = expr;
+	}
+
+	return false;
+}
+
+void ExpressionStore::getExpressions( QList< const ExpressionInfo* > &l ) const
+{
+	l.clear();
+
+	QMap< QString, ExpressionInfo* >::const_iterator itr = m_pvt->expressions.constBegin();
+	while( itr != m_pvt->expressions.constEnd() )
+	{
+		l.push_back( itr.value() );
+		++itr;
+	}
+}
+
+const ExpressionInfo* ExpressionStore::getInfo( const QString &name )
+{
+	QMap< QString, ExpressionInfo* >::const_iterator itr = m_pvt->expressions.find( name );
+	if( itr == m_pvt->expressions.end() )
+		return NULL;
+	else
+		return itr.value();
+}
+
+
+

code/studio/src/plugins/gui_editor/expression_store.h

@@ -0,0 +1,46 @@
+// Ryzom Core Studio - GUI Editor Plugin
+//
+// Copyright (C) 2014 Laszlo Kis-Adam
+// Copyright (C) 2010 Ryzom Core <http://ryzomcore.org/>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as
+// published by the Free Software Foundation, either version 3 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef EXPRESSION_STORE
+#define EXPRESSION_STORE
+
+#include <QString>
+#include <QList>
+#include "expression_info.h"
+
+//struct ExpressionInfo;
+class ExpressionStorePvt;
+
+class ExpressionStore
+{
+public:
+	ExpressionStore();
+	~ExpressionStore();
+
+	bool load();
+
+	void getExpressions( QList< const ExpressionInfo* > &l ) const;
+
+	const ExpressionInfo* getInfo( const QString &name );
+
+private:
+	ExpressionStorePvt *m_pvt;
+};
+
+#endif
+

code/studio/src/plugins/gui_editor/expressions/add.xml

@@ -0,0 +1,9 @@
+<expression>
+<category>Mathematical</category>
+<name>add</name>
+<variable>true</variable>
+<slots>
+<slot>A</slot>
+<slot>B</slot>
+</slots>
+</expression>

code/studio/src/plugins/gui_editor/expressions/and.xml

@@ -0,0 +1,9 @@
+<expression>
+<category>Logical</category>
+<name>and</name>
+<variable>true</variable>
+<slots>
+<slot>A</slot>
+<slot>B</slot>
+</slots>
+</expression>

code/studio/src/plugins/gui_editor/expressions/div.xml

@@ -0,0 +1,9 @@
+<expression>
+<category>Mathematical</category>
+<name>div</name>
+<variable>false</variable>
+<slots>
+<slot>A</slot>
+<slot>B</slot>
+</slots>
+</expression>

code/studio/src/plugins/gui_editor/expressions/eq.xml

@@ -0,0 +1,9 @@
+<expression>
+<category>Logical</category>
+<name>eq</name>
+<variable>true</variable>
+<slots>
+<slot>A</slot>
+<slot>B</slot>
+</slots>
+</expression>

code/studio/src/plugins/gui_editor/expressions/ifthenelse.xml

@@ -0,0 +1,10 @@
+<expression>
+<category>Logical</category>
+<name>ifthenelse</name>
+<variable>false</variable>
+<slots>
+<slot>if</slot>
+<slot>then</slot>
+<slot>else</slot>
+</slots>
+</expression>

code/studio/src/plugins/gui_editor/expressions/mul.xml

@@ -0,0 +1,9 @@
+<expression>
+<category>Mathematical</category>
+<name>mul</name>
+<variable>true</variable>
+<slots>
+<slot>A</slot>
+<slot>B</slot>
+</slots>
+</expression>

code/studio/src/plugins/gui_editor/expressions/ne.xml

@@ -0,0 +1,9 @@
+<expression>
+<category>Logical</category>
+<name>ne</name>
+<variable>true</variable>
+<slots>
+<slot>A</slot>
+<slot>B</slot>
+</slots>
+</expression>

code/studio/src/plugins/gui_editor/expressions/not.xml

@@ -0,0 +1,8 @@
+<expression>
+<category>Logical</category>
+<name>not</name>
+<variable>false</variable>
+<slots>
+<slot>A</slot>
+</slots>
+</expression>

code/studio/src/plugins/gui_editor/expressions/or.xml

@@ -0,0 +1,9 @@
+<expression>
+<category>Logical</category>
+<name>or</name>
+<variable>true</variable>
+<slots>
+<slot>A</slot>
+<slot>B</slot>
+</slots>
+</expression>

code/studio/src/plugins/gui_editor/expressions/sub.xml

@@ -0,0 +1,9 @@
+<expression>
+<category>Mathematical</category>
+<name>sub</name>
+<variable>false</variable>
+<slots>
+<slot>A</slot>
+<slot>B</slot>
+</slots>
+</expression>

code/studio/src/plugins/gui_editor/expressions/value.xml

@@ -0,0 +1,6 @@
+<expression>
+<category>Value</category>
+<name>value</name>
+<value>true</value>
+<variable>false</variable>
+</expression>

code/studio/src/plugins/gui_editor/gui_editor_window.cpp

@@ -44,7 +44,6 @@
 #include "editor_selection_watcher.h"
 #include "editor_message_processor.h"
 #include "add_widget_widget.h"
-#include "texture_chooser.h"
 
 namespace GUIEditor
 {
@@ -71,8 +70,6 @@ namespace GUIEditor
 
 		widgetInfoTree = new CWidgetInfoTree;
 
-		tc = new TextureChooser();
-
 		createMenus();
 		readSettings();
 
@@ -118,9 +115,6 @@ namespace GUIEditor
 
 		removeMenus();
 
-		delete tc;
-		tc = NULL;
-
 		delete messageProcessor;
 		messageProcessor = NULL;
 
@@ -359,12 +353,6 @@ namespace GUIEditor
 		GUICtrl->show();
 	}
 
-	void GUIEditorWindow::onTCClicked()
-	{
-		tc->load();
-		tc->exec();
-	}
-
 	void GUIEditorWindow::createMenus()
 	{
 		Core::MenuManager *mm = Core::ICore::instance()->menuManager();
@@ -411,10 +399,6 @@ namespace GUIEditor
 			connect( a, SIGNAL( triggered( bool ) ), this, SLOT( onAddWidgetClicked() ) );
 			m->addAction( a );
 
-			a = new QAction( "Texture Chooser", this );
-			connect( a, SIGNAL( triggered( bool ) ), this, SLOT( onTCClicked() ) );
-			m->addAction( a );
-
 			menu = m;
 		}
 	}

code/studio/src/plugins/gui_editor/gui_editor_window.h

@@ -25,11 +25,8 @@
 #include "property_browser_ctrl.h"
 
 class QtTreePropertyBrowser;
-
 class QMenu;
 
-class TextureChooser;
-
 namespace GUIEditor
 {
 
@@ -67,8 +64,6 @@ private Q_SLOTS:
 		void onGUILoaded();
 		void onAddWidgetClicked();
 		void onTreeChanged();
-		void onTCClicked();
-
 
 protected:
 		void hideEvent( QHideEvent *evnt );
@@ -101,8 +96,6 @@ private:
 		QString currentProjectFile;
 
 		QMenu *menu;
-
-		TextureChooser *tc;
 	};
 
 }

code/studio/src/plugins/gui_editor/link_editor.cpp

@@ -18,20 +18,49 @@
 #include "link_editor.h"
 #include "nel/gui/interface_group.h"
 #include "nel/gui/widget_manager.h"
+#include "expression_editor.h"
+#include <QMenu>
 
 namespace GUIEditor
 {
+	class LinkEditorPvt
+	{
+	public:
+
+		LinkEditorPvt()
+		{
+			ee = new ExpressionEditor();
+			ee->load();
+		}
+
+		~LinkEditorPvt()
+		{
+			delete ee;
+			ee = NULL;
+		}
+
+		ExpressionEditor *ee;
+	};
+
+
 	LinkEditor::LinkEditor( QWidget *parent ) :
 	QWidget( parent )
 	{
 		setupUi( this );
 		setup();
+
+		m_pvt = new LinkEditorPvt();
+
 		connect( okButton, SIGNAL( clicked( bool ) ), this, SLOT( onOKButtonClicked() ) );
 		connect( cancelButton, SIGNAL( clicked( bool ) ), this, SLOT( hide() ) );
+		connect( expressionEdit, SIGNAL( customContextMenuRequested( const QPoint& ) ), this, SLOT( onTextEditContextMenu( const QPoint& ) ) );
+		connect( m_pvt->ee, SIGNAL( closing() ), this, SLOT( onEEClosing() ) );
 	}
 
 	LinkEditor::~LinkEditor()
 	{
+		delete m_pvt;
+		m_pvt = NULL;
 	}
 
 	void LinkEditor::setup()
@@ -89,4 +118,23 @@ namespace GUIEditor
 
 		hide();
 	}
+
+	void LinkEditor::onTextEditContextMenu( const QPoint &pos )
+	{
+		QMenu *menu = expressionEdit->createStandardContextMenu();
+		QAction *a = menu->addAction( "Expression Editor" );
+		connect( a, SIGNAL( triggered() ), this, SLOT( onEE() ) );
+
+		menu->exec( mapToGlobal( pos ) );
+	}
+
+	void LinkEditor::onEE()
+	{
+		m_pvt->ee->show();
+	}
+
+	void LinkEditor::onEEClosing()
+	{
+		expressionEdit->setPlainText( m_pvt->ee->result() );
+	}
 }

code/studio/src/plugins/gui_editor/link_editor.h

@@ -23,6 +23,8 @@
 
 namespace GUIEditor
 {
+	class LinkEditorPvt;
+
 	class LinkEditor : public QWidget, public Ui::LinkEditor
 	{
 		Q_OBJECT
@@ -35,12 +37,16 @@ namespace GUIEditor
 
 	Q_SIGNALS:
 		void okClicked();
-
+		
 	private Q_SLOTS:
 		void onOKButtonClicked();
+		void onTextEditContextMenu( const QPoint &pos );
+		void onEE();
+		void onEEClosing();
 
 	private:
 		uint32 currentLinkId;
+		LinkEditorPvt *m_pvt;
 	};
 }
 

code/studio/src/plugins/gui_editor/link_editor.ui

@@ -26,6 +26,9 @@
    </item>
    <item row="1" column="0" colspan="3">
     <widget class="QPlainTextEdit" name="expressionEdit">
+     <property name="contextMenuPolicy">
+      <enum>Qt::CustomContextMenu</enum>
+     </property>
      <property name="plainText">
       <string/>
      </property>