gtk3-tqt-engine/tdegtk/tdegtk-utils.h

#ifndef tdegtk_utils_h
#define tdegtk_utils_h
/*
* this file was largely taken from the oxygen gtk engine
* Copyright (c) 2010 Hugo Pereira Da Costa <hugo@oxygen-icons.org>
* Copyright (c) 2010 Ruslan Kabatsayev <b7.10110111@gmail.com>
*
* GdkPixbuf modification code from Walmis
* <http://gnome-look.org/content/show.php?content=77783&forumpage=3>
*
* 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 "oxygenrgba.h"

#include <gdk/gdk.h>
#include <gtk/gtk.h>

#include <cmath>
#include <string>

#if 0
    //! GdkRectangle streamer
    inline std::ostream& operator << (std::ostream& out, const GdkRectangle& rect )
    {
        out << "( " << rect.x << "," << rect.y << "," << rect.width << "," << rect.height << ")";
        return out;
    }

    //! GtkBorder streamer
    inline std::ostream& operator << (std::ostream& out, const GtkBorder& border )
    {
        out << "( " << border.left << "," << border.right << "," << border.top << "," << border.bottom << ")";
        return out;
    }

    //! streamer for GtkWidgetPath
    std::ostream& operator << ( std::ostream& out, const GtkWidgetPath* path );

    //! GtkContainer streamer
    inline std::ostream& operator << (std::ostream& out, GtkContainer* container)
    {
        GList* children=gtk_container_get_children(container);
        for(GList* child=g_list_first(children); child; child=g_list_next(child))
        {
            out << G_OBJECT_TYPE_NAME(child->data) << " ";
        }
        g_list_free(children);
        return out;
    }
#endif

    namespace Gtk
    {

        //! mouse button enumeration
        enum MouseButton
        {
            NoButton = 0,
            LeftButton = 1,
            RightButton = 2,
            MidButton = 3
        };

        //@!name gdk utilities
        //@{

#if 0
        //! returns OxygenRgba color from GdkColor
        /*! TODO: remove as obsolete */
        inline ColorUtils::Rgba gdk_get_color( const GdkColor& color )
        {
            return ColorUtils::Rgba(
                double(color.red)/0xffff,
                double(color.green)/0xffff,
                double(color.blue)/0xffff );
        }

        //! returns OxygenRgba color from GdkColor
        inline ColorUtils::Rgba gdk_get_color( const GdkRGBA& color )
        { return ColorUtils::Rgba( color.red, color.green, color.blue, color.alpha ); }
#endif

        //! map widget origin to top level
        /*!
        x and y correspond to (0,0) maped to toplevel window;
        w and h correspond to toplevel window frame size
        */
        bool gdk_window_map_to_toplevel( GdkWindow*, gint*, gint*, gint*, gint*, bool frame = false );

        //! map widget origin to top level
        /*!
        x and y correspond to (0,0) maped to toplevel window;
        w and h correspond to toplevel window frame size
        */
        bool gtk_widget_map_to_toplevel( GtkWidget*, gint*, gint*, gint*, gint*, bool frame = false );

        //! map widget onto another (parent) widget
        /*! second argument can be any parent in widget's ancestry tree */
        bool gtk_widget_map_to_parent( GtkWidget*, GtkWidget*, gint*, gint*, gint*, gint* );

        //! map window/widget origin to top level
        inline bool gdk_map_to_toplevel( GdkWindow* window, GtkWidget* widget, gint* x, gint* y, gint* w, gint* h, bool frame = false )
        {
            if( window && GDK_IS_WINDOW( window ) ) return gdk_window_map_to_toplevel( window, x, y, w, h, frame );
            else return gtk_widget_map_to_toplevel( widget, x, y, w, h, frame );
        }

        //! map window origin to top level
        inline bool gdk_map_to_toplevel( GdkWindow* window, gint* x, gint* y, gint* w, gint* h, bool frame = false )
        { return gdk_window_map_to_toplevel( window, x, y, w, h, frame ); }

        //! translate origin of child window into parent
        /*! returns true on success */
        bool gdk_window_translate_origin( GdkWindow*, GdkWindow*, gint*, gint* );

        //! get top level windows dimension
        void gdk_toplevel_get_size( GdkWindow*, gint*, gint* );

        //! get top level windows dimension
        void gdk_toplevel_get_frame_size( GdkWindow*, gint*, gint* );

        //! get position relatve to toplevel
        void gdk_window_get_toplevel_origin( GdkWindow*, gint*, gint* );

        //! add alpha channel to pixbuf
        GdkPixbuf* gdk_pixbuf_set_alpha( const GdkPixbuf*, double );

        //! changes the gamma value of an image
        bool gdk_pixbuf_to_gamma( GdkPixbuf* pixbuf, double value );

        //! resize pixbuf
        GdkPixbuf* gdk_pixbuf_resize( GdkPixbuf* src, int width, int height );

        //! returns initialized GdkRectangle
        inline GdkRectangle gdk_rectangle( int x = 0, int y = 0, int w = -1, int h = -1 )
        {
            GdkRectangle out = {x, y, w, h};
            return out;
        }

        //! returns true if rectangle is valid
        inline bool gdk_rectangle_is_valid( const GdkRectangle* rect )
        { return rect && rect->width > 0 && rect->height > 0; }

        //! performs union of two rectangle, properly accounting for their validity
        inline void gdk_rectangle_union( const GdkRectangle* first, const GdkRectangle* second, GdkRectangle* out )
        {
            if( !out ) return;
            const bool firstIsValid( Gtk::gdk_rectangle_is_valid( first ) );
            const bool secondIsValid( Gtk::gdk_rectangle_is_valid( second ) );
            if( firstIsValid && secondIsValid )  ::gdk_rectangle_union( first, second, out );
            else if( secondIsValid ) *out = *second;
            else *out = *first;
        }

        //! returns true if given rectangle contains point
        inline bool gdk_rectangle_contains( const GdkRectangle* rect, int x, int y )
        {
            return
                rect &&
                ( rect->x <= x && (rect->x + rect->width) > x ) &&
                ( rect->y <= y && (rect->y + rect->height) > y );
        }

        //@}

        //! get arrow orientation from angle
        inline GtkArrowType gtk_arrow_get_type( const double& angle )
        {
            static const double delta( 0.001 );
            if( std::abs( angle ) < delta ) return GTK_ARROW_UP;
            else if( std::abs( angle - M_PI/2 ) < delta ) return GTK_ARROW_RIGHT;
            else if( std::abs( angle - M_PI ) < delta ) return GTK_ARROW_DOWN;
            else return GTK_ARROW_LEFT;
        }

        //! returns true if widget's layout is reversed
        inline bool gtk_widget_layout_is_reversed( GtkWidget* widget )
        { return widget ? gtk_widget_get_direction( widget ) == GTK_TEXT_DIR_RTL : false; }

        //! returns true if widget's layout is reversed
        inline bool gtk_theming_engine_layout_is_reversed( GtkThemingEngine* engine )
        { return engine ? gtk_theming_engine_get_direction( engine ) == GTK_TEXT_DIR_RTL : false; }

        //! set all buttons in the container to state NORMAL
        void gtk_container_adjust_buttons_state( GtkContainer*, gpointer=0L );

        //! returns widget allocation
        inline GtkAllocation gtk_widget_get_allocation( GtkWidget* widget )
        {
            GtkAllocation allocation = { 0, 0, -1, -1 };
            ::gtk_widget_get_allocation( widget, &allocation );
            return allocation;
        }

        //! returns true if given path has given type
        bool gtk_widget_path_has_type( const GtkWidgetPath*, GType );

        //! returns true if widget is a groupbox (a la Qt)
        inline bool gtk_widget_is_groupbox( GtkWidget* widget )
        {
            return
                GTK_IS_FRAME( widget ) &&
                gtk_frame_get_label_widget( GTK_FRAME( widget ) ) &&
                gtk_frame_get_shadow_type( GTK_FRAME( widget ) ) == GTK_SHADOW_OUT;
        }

        //! returns true if widget (or one of its parent) has a custom background
        bool gtk_widget_has_custom_background( GtkWidget*, GtkStateType = GTK_STATE_NORMAL );

        //! returns true if is an Gnome applet
        bool gtk_widget_is_applet( GtkWidget* );

        //! print some widget information
        void gtk_widget_print_tree( GtkWidget* );

        //! returns true if widget supports rgba
        bool gtk_widget_has_rgba( GtkWidget* );

        //! returns true if default screen is composited
        bool gdk_default_screen_is_composited( void );

        //! returns true if window supports rgba
        bool gdk_window_has_rgba( GdkWindow* );

        //! true if visual supports rgba
        bool gdk_visual_has_rgba( GdkVisual* );

        //! returns true if window is a base window
        bool gdk_window_is_base( GdkWindow* );

        //! returns true if window is a base window that do not need painting
        bool gdk_window_nobackground( GdkWindow* );

        //! true if object match a given type
        bool g_object_is_a( const GObject*, const std::string& );

        //! trigger area update using GdkRectangle
        inline void gtk_widget_queue_draw( GtkWidget* widget, const GdkRectangle* rect = 0L )
        {
            if( !gdk_rectangle_is_valid( rect ) ) ::gtk_widget_queue_draw( widget );
            else ::gtk_widget_queue_draw_area( widget, rect->x, rect->y, rect->width, rect->height );
        }

        //!@name check parent type
        //@{

        //! returns widget path as a string
        std::string gtk_widget_path( GtkWidget* );

        //! return parent of given type if any
        GtkWidget* gtk_widget_find_parent( GtkWidget*, GType );

        //! return parent of given type
        inline GtkWidget* gtk_widget_find_parent( GtkWidget* widget, const std::string& typeName )
        {
            const GType tmp( g_type_from_name( typeName.c_str() ) );
            return tmp ? gtk_widget_find_parent( widget, tmp ): 0L;
        }

        //! return parent "group box" if any.
        GtkWidget* gtk_parent_groupbox( GtkWidget* widget );

        //! return parent button if any.
        inline GtkWidget* gtk_parent_button( GtkWidget* widget )
        { return gtk_widget_find_parent( widget, GTK_TYPE_BUTTON ); }

        //! return parent menu if any
        inline GtkWidget* gtk_parent_menubar( GtkWidget* widget )
        { return gtk_widget_find_parent( widget, GTK_TYPE_MENU_BAR ); }

        //! return parent menu if any
        inline GtkWidget* gtk_parent_menu( GtkWidget* widget )
        { return gtk_widget_find_parent( widget, GTK_TYPE_MENU ); }

        //! return parent treeview if any.
        inline GtkWidget* gtk_parent_tree_view( GtkWidget* widget )
        { return gtk_widget_find_parent( widget, GTK_TYPE_TREE_VIEW ); }

        //! return parent combobox if any.
        inline GtkWidget* gtk_parent_combobox( GtkWidget* widget )
        { return gtk_widget_find_parent( widget, GTK_TYPE_COMBO_BOX ); }

        //! return parent combobox if any.
        inline GtkWidget* gtk_parent_combobox_entry( GtkWidget* widget )
        {
            GtkWidget* parent( gtk_parent_combobox( widget ) );
            return ( parent && gtk_combo_box_get_has_entry( GTK_COMBO_BOX( parent ) ) ) ? parent:0L;
        }

        //! return parent scrolled window if any.
        inline GtkWidget* gtk_parent_scrolled_window( GtkWidget* widget )
        { return gtk_widget_find_parent( widget, GTK_TYPE_SCROLLED_WINDOW ); }

        //! return parent statusbar if any.
        inline GtkWidget* gtk_parent_statusbar( GtkWidget* widget )
        { return gtk_widget_find_parent( widget, GTK_TYPE_STATUSBAR ); }

        //! return parent combobox if any.
        inline GtkWidget* gtk_parent_notebook( GtkWidget* widget )
        { return gtk_widget_find_parent( widget, GTK_TYPE_NOTEBOOK ); }

        //! returns true if potentialParent is (maybe indirect) parent of widget
        bool gtk_widget_is_parent( GtkWidget*, GtkWidget* potentialParent );

        //! returns true if one of the parent widgets has a sunken shadow
        bool gtk_parent_is_shadow_in( GtkWidget* );

        //@}

        //! true if a widget (orientable) is horizontal
        inline bool gtk_widget_is_horizontal( GtkWidget* widget )
        {
            if( !GTK_IS_ORIENTABLE( widget ) ) return true;
            return gtk_orientable_get_orientation( GTK_ORIENTABLE( widget ) ) == GTK_ORIENTATION_HORIZONTAL;
        }


        //! true if a widget (orientable) is vertical
        inline bool gtk_widget_is_vertical( GtkWidget* widget )
        {
            if( !GTK_IS_ORIENTABLE( widget ) ) return false;
            return gtk_orientable_get_orientation( GTK_ORIENTABLE( widget ) ) == GTK_ORIENTATION_VERTICAL;
        }

        //! true if scrolled window must be forced to have a sunken frame
        bool gtk_scrolled_window_force_sunken( GtkWidget* );

        //!@name button utilities
        //@{

        //! true for 'flat' buttons (e.g. toolbuttons)
        bool gtk_button_is_flat( GtkWidget* );

        //! true for treeview headers and affiliated
        bool gtk_button_is_header( GtkWidget* );

        //! true for buttons in path bars
        bool gtk_button_is_in_path_bar( GtkWidget* widget );

        //! true if widget is last in path bar
        bool gtk_path_bar_button_is_last( GtkWidget* widget );

        //! returns an image on button-container
        GtkWidget* gtk_button_find_image( GtkWidget* );

        //! returns an image on button-container
        GtkWidget* gtk_button_find_label( GtkWidget* );

        //@}

        //!@name combobox utilities
        //@{

        //! returns true if combobox has frame
        bool gtk_combobox_has_frame( GtkWidget* );

        //! true if widget is the treeview of a combobox
        bool gtk_combobox_is_tree_view( GtkWidget* );

        //! true if widget is the treeview of a combobox
        bool gtk_combobox_is_scrolled_window( GtkWidget* );

        //! true if widget is the treeview of a combobox
        bool gtk_combobox_is_viewport( GtkWidget* );

        //! true if widget is the treeview of a combobox
        bool gtk_combobox_is_frame( GtkWidget* );

        //! true if combobox must appear as list
        bool gtk_combobox_appears_as_list( GtkWidget* );

        //@}

        //!@name notebook utilities
        //@{

        //! returns true if position is in hovered tab
        //* this should move to OxygenTabWidgetData
        bool gtk_notebook_tab_contains( GtkWidget*, int tab, int x, int y );

        //! returns tab matching position or -1 if none
        int gtk_notebook_find_tab( GtkWidget*, int x, int y );

        //! returns index of first visible tab
        int gtk_notebook_find_first_tab( GtkWidget* );

        //! returns true if widget is one of the notebook's tab labels
        bool gtk_notebook_is_tab_label( GtkNotebook*, GtkWidget* );

        //! returns tabbar rect in notebook
        void gtk_notebook_get_tabbar_rect( GtkNotebook*, GdkRectangle* );

        //! returns true if notebook has visible scrollbar arrows
        /*! arrows are dimmed visible if at least one of the child tab_labels is unmapped */
        bool gtk_notebook_has_visible_arrows( GtkNotebook* );

        // make all the buttons on the tabs normal
        bool gtk_notebook_update_close_buttons( GtkNotebook*);

        //! returns true if widget is a notebook close button
        bool gtk_notebook_is_close_button( GtkWidget* );

        //@}

        //! calculates viewport offsets (between view window and bin window
        void gtk_viewport_get_position( GtkViewport*, gint*, gint* );

        //! returns a widget which has response_id as response id for dialog
        GtkWidget* gtk_dialog_find_button( GtkDialog*, gint );

    }

#endif