Add tab prelighting support

1 files changed, 308 insertions, 0 deletions

diff --git a/tdegtk/tdegtk-tabwidgetdata.cpp b/tdegtk/tdegtk-tabwidgetdata.cpp
new file mode 100644
index 0000000..19d70b8
--- /dev/null
+++ b/tdegtk/tdegtk-tabwidgetdata.cpp
@@ -0,0 +1,308 @@
+/*
+* this file was largely taken from the oxygen gtk engine
+* Copyright (c) 2010 Hugo Pereira Da Costa <[email protected]>
+*
+* the tabwidget data code is largely inspired from the gtk redmond engine
+*
+* This  library is free  software; you can  redistribute it and/or
+* modify it  under  the terms  of the  GNU Lesser  General  Public
+* License  as published  by the Free  Software  Foundation; either
+* version 2 of the License, or(at your option ) any later version.
+*
+* This library 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
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public
+* License  along  with  this library;  if not,  write to  the Free
+* Software Foundation, Inc., 51  Franklin St, Fifth Floor, Boston,
+* MA 02110-1301, USA.
+*/
+
+#include "tdegtk-tabwidgetdata.h"
+#include "tdegtk-utils.h"
+#include "config.h"
+
+#include <gtk/gtk.h>
+#include <cassert>
+#include <iostream>
+
+    //________________________________________________________________________________
+    void TabWidgetData::connect( GtkWidget* widget )
+    {
+
+        #if TDEGTK_DEBUG
+        std::cerr << "TDEGTK::TabWidgetData::connect - " << widget << std::endl;
+        #endif
+
+        _target = widget;
+        _motionId.connect( G_OBJECT(widget), "motion-notify-event", G_CALLBACK( motionNotifyEvent ), this );
+        _leaveId.connect( G_OBJECT(widget), "leave-notify-event", G_CALLBACK( leaveNotifyEvent ), this );
+        _pageAddedId.connect( G_OBJECT(widget), "page-added", G_CALLBACK( pageAddedEvent ), this );
+
+        updateRegisteredChildren( widget );
+
+    }
+
+    //________________________________________________________________________________
+    void TabWidgetData::disconnect( GtkWidget* widget )
+    {
+
+        #if TDEGTK_DEBUG
+        std::cerr << "TDEGTK::TabWidgetData::disconnect - " << widget << std::endl;
+        #endif
+
+        _target = 0L;
+        _motionId.disconnect();
+        _leaveId.disconnect();
+        _pageAddedId.disconnect();
+
+        // disconnect all children
+        for( ChildDataMap::iterator iter = _childrenData.begin(); iter != _childrenData.end(); ++iter )
+        { iter->second.disconnect(); }
+        _childrenData.clear();
+
+    }
+
+    //________________________________________________________________________________
+    void TabWidgetData::updateHoveredTab( GtkWidget* widget )
+    {
+
+        if( !widget ) widget = _target;
+        if( !widget ) return;
+
+        // get pointer position
+        int xPointer(0), yPointer(0);
+
+        GdkDeviceManager* manager( gdk_display_get_device_manager( gtk_widget_get_display( widget ) ) );
+        GdkDevice* pointer( gdk_device_manager_get_client_pointer( manager ) );
+        if( !pointer ) return;
+
+        gdk_window_get_device_position( gtk_widget_get_window( widget ), pointer, &xPointer, &yPointer, 0L );
+
+
+        // loop over tabs and check matching
+        for( unsigned int i = (unsigned int)Gtk::gtk_notebook_find_first_tab( widget ); i < _tabRects.size(); i++ )
+        {
+            if( Gtk::gdk_rectangle_contains( &_tabRects[i], xPointer, yPointer ) )
+            { setHoveredTab( widget, i ); return; }
+        }
+
+        // reset hovered tab
+        setHoveredTab( widget, -1 );
+        return;
+
+    }
+
+    //________________________________________________________________________________
+    void TabWidgetData::updateTabRect( GtkWidget* widget, int index, const GdkRectangle& r )
+    {
+        // make sure the vector has the right size
+        if( !GTK_IS_NOTEBOOK( widget ) ) return;
+        GtkNotebook* notebook = GTK_NOTEBOOK( widget );
+        _tabRects.resize( gtk_notebook_get_n_pages( notebook ), defaultRect() );
+
+        // check index against number of tabs
+        if( index < 0 || index >= (int)_tabRects.size() )
+        { return; }
+
+        // store rectangle
+        _tabRects[index]=r;
+    }
+
+    //________________________________________________________________________________
+    void TabWidgetData::setDirty( bool value )
+    {
+        if( _dirty == value ) return;
+        _dirty = value;
+        if( _dirty && _target )
+        {
+
+            // we should only update the tabbar rect here
+            GdkRectangle updateRect;
+            Gtk::gtk_notebook_get_tabbar_rect( GTK_NOTEBOOK( _target ), &updateRect );
+            Gtk::gtk_widget_queue_draw( _target, &updateRect );
+
+            #if TDEGTK_DEBUG
+            std::cerr << "TDEGTK::TabWidgetData::setDirty - update: " << updateRect << std::endl;
+            #endif
+
+        }
+
+    }
+
+    //________________________________________________________________________________
+    bool TabWidgetData::isInTab( int x, int y ) const
+    {
+
+        // loop over tab rectangles and check.
+        for( RectangleList::const_iterator iter = _tabRects.begin(); iter != _tabRects.end(); ++iter )
+        { if( Gtk::gdk_rectangle_contains( &(*iter), x, y ) ) return true; }
+
+        return false;
+
+    }
+
+    //________________________________________________________________________________
+    void TabWidgetData::setHoveredTab( GtkWidget* widget, int index )
+    {
+
+        if( _hoveredTab == index ) return;
+
+        _hoveredTab = index;
+
+        GdkRectangle updateRect( Gtk::gdk_rectangle() );
+        for( RectangleList::const_iterator iter = _tabRects.begin(); iter != _tabRects.end(); ++iter )
+        { gdk_rectangle_union( &(*iter), &updateRect, &updateRect ); }
+
+        gtk_widget_queue_draw_area( widget, updateRect.x-4, updateRect.y-4, updateRect.width+8, updateRect.height+8 );
+
+        return;
+    }
+
+    //________________________________________________________________________________
+    gboolean TabWidgetData::motionNotifyEvent(GtkWidget* widget, GdkEventMotion*, gpointer data )
+    {
+
+        static_cast<TabWidgetData*>( data )->updateHoveredTab( widget );
+        return FALSE;
+
+    }
+
+    //________________________________________________________________________________
+    gboolean TabWidgetData::leaveNotifyEvent( GtkWidget* widget, GdkEventCrossing*, gpointer data )
+    {
+        // reset hovered tab
+        static_cast<TabWidgetData*>( data )->setHoveredTab( widget, -1 );
+        return FALSE;
+    }
+
+    //________________________________________________________________________________
+    void TabWidgetData::pageAddedEvent( GtkNotebook* parent, GtkWidget* child, guint, gpointer data)
+    {
+        #if TDEGTK_DEBUG
+        std::cerr << "TDEGTK::TabWidgetData::pageAddedEvent - " << child << std::endl;
+        #endif
+        static_cast<TabWidgetData*>(data)->updateRegisteredChildren( GTK_WIDGET( parent ) );
+    }
+
+    //________________________________________________________________________________
+    void TabWidgetData::updateRegisteredChildren( GtkWidget* widget )
+    {
+
+        if( !widget ) widget = _target;
+        if( !widget ) return;
+
+        // cast to notebook and check against number of pages
+        if( GTK_IS_NOTEBOOK( widget ) )
+        {
+            GtkNotebook* notebook( GTK_NOTEBOOK( widget ) );
+            for( int i = 0; i <  gtk_notebook_get_n_pages( notebook ); ++i )
+            {
+
+                // retrieve page and tab label
+                GtkWidget* page( gtk_notebook_get_nth_page( notebook, i ) );
+                registerChild( gtk_notebook_get_tab_label( notebook, page ) );
+            }
+        }
+    }
+
+    //________________________________________________________________________________
+    void TabWidgetData::registerChild( GtkWidget* widget )
+    {
+
+        // do nothing if child is invalid (might happen: not checked at calling stage)
+        if( !widget ) return;
+
+        // make sure widget is not already in map
+        if( _childrenData.find( widget ) == _childrenData.end() )
+        {
+
+            #if TDEGTK_DEBUG
+            std::cerr << "TDEGTK::TabWidgetData::registerChild - " << widget << std::endl;
+            #endif
+
+            // allocate new ChildData
+            ChildData data;
+            data._destroyId.connect( G_OBJECT(widget), "destroy", G_CALLBACK( childDestroyNotifyEvent ), this );
+            data._enterId.connect( G_OBJECT(widget), "enter-notify-event", G_CALLBACK( childCrossingNotifyEvent ), this );
+            data._leaveId.connect( G_OBJECT(widget), "leave-notify-event", G_CALLBACK( childCrossingNotifyEvent ), this );
+
+            if( GTK_IS_CONTAINER( widget ) )
+            { data._addId.connect( G_OBJECT(widget), "add", G_CALLBACK( childAddedEvent ), this ); }
+
+            // and insert in map
+            _childrenData.insert( std::make_pair( widget, data ) );
+
+        }
+
+        /*
+        also insert widget's children, recursively.
+        that should take care of buttons in tabs and other fancy stuff that applications mght do
+        */
+        if( GTK_IS_CONTAINER( widget ) )
+        {
+
+            GList *children( gtk_container_get_children( GTK_CONTAINER(widget) ) );
+            for( GList* child = g_list_first(children); child; child = g_list_next(child) )
+            { registerChild( GTK_WIDGET( child->data ) ); }
+
+            if( children ) g_list_free( children );
+        }
+
+    }
+
+    //________________________________________________________________________________
+    void TabWidgetData::unregisterChild( GtkWidget* widget )
+    {
+
+        ChildDataMap::iterator iter( _childrenData.find( widget ) );
+        if( iter == _childrenData.end() ) return;
+
+        #if TDEGTK_DEBUG
+        std::cerr << "TDEGTK::TabWidgetData::unregisterChild - " << widget << std::endl;
+        #endif
+
+        iter->second.disconnect();
+        _childrenData.erase( iter );
+
+    }
+
+    //____________________________________________________________________________________________
+    gboolean TabWidgetData::childDestroyNotifyEvent( GtkWidget* widget, gpointer data )
+    {
+        static_cast<TabWidgetData*>(data)->unregisterChild( widget );
+        return FALSE;
+    }
+
+    //____________________________________________________________________________________________
+    void TabWidgetData::childAddedEvent( GtkContainer* parent, GtkWidget*, gpointer data )
+    {
+        static_cast<TabWidgetData*>(data)->updateRegisteredChildren();
+        return;
+    }
+
+
+    //____________________________________________________________________________________________
+    gboolean TabWidgetData::childCrossingNotifyEvent( GtkWidget* widget, GdkEventCrossing*, gpointer data )
+    {
+
+        // retrieve widget's parent and check type
+        static_cast<TabWidgetData*>(data)->updateHoveredTab();
+        return FALSE;
+
+    }
+
+    //____________________________________________________________________________________________
+    void TabWidgetData::ChildData::disconnect( void )
+    {
+
+        _destroyId.disconnect();
+        _enterId.disconnect();
+        _leaveId.disconnect();
+        _addId.disconnect();
+
+    }
+
+