main.c
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#include <gtk/gtk.h>#include "gtkextendtreeview.h"static GtkWidget* BuildExtendTreeView(){/* Creates an instance of the new widget */GtkExtendTreeView* const extend_tree = GTK_EXTEND_TREE_VIEW(gtk_extend_tree_view_new());/* Create a sample tree model */GtkListStore* const store = gtk_list_store_new(2,G_TYPE_STRING,G_TYPE_STRING);/* Set in the template two columns of example */GtkTreeView* const table = GTK_TREE_VIEW(extend_tree);gtk_tree_view_set_model(table,GTK_TREE_MODEL(store));/* Create a new GtkCellRendererText, add it to the tree view column */GtkCellRenderer* const renderer = gtk_cell_renderer_text_new();/* Create all the tree view columns needed to build the tree view model, and append them to the tree view */GtkTreeViewColumn *column = NULL;column = gtk_tree_view_column_new_with_attributes("First Column",renderer,"text",0,NULL);gtk_tree_view_append_column(table,column);column = gtk_tree_view_column_new_with_attributes("Second Column",renderer,"text",1,NULL);gtk_tree_view_append_column(table,column);/* Return the new widget */return GTK_WIDGET(extend_tree);}int main (int argc, char *argv[]){GtkWidget *win = NULL;/* Initialize GTK+ */g_log_set_handler ("Gtk", G_LOG_LEVEL_WARNING, (GLogFunc) gtk_false, NULL);gtk_init (&argc, &argv);g_log_set_handler ("Gtk", G_LOG_LEVEL_WARNING, g_log_default_handler, NULL);/* Create the main window */win = gtk_window_new (GTK_WINDOW_TOPLEVEL);gtk_container_set_border_width (GTK_CONTAINER (win), 8);gtk_window_set_title (GTK_WINDOW (win), "Example to Extend Tree View");gtk_window_set_position (GTK_WINDOW (win), GTK_WIN_POS_CENTER);g_signal_connect (win, "destroy", gtk_main_quit, NULL);gtk_widget_set_size_request(GTK_WIDGET(win), 600,300);gtk_widget_realize (win);/* Creates an instance of the new widget and attach it to the window */gtk_container_add (GTK_CONTAINER (win), BuildExtendTreeView());/* Enter the main loop */gtk_widget_show_all (win);gtk_main ();return 0;}
gtkextendtreeview.h
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/* GTK - The GIMP Toolkit* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald** This library is free software; you can redistribute it and/or* modify it under the terms of the GNU Library 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* Library General Public License for more details.** You should have received a copy of the GNU Library General Public* License along with this library; if not, write to the* Free Software Foundation, Inc., 59 Temple Place - Suite 330,* Boston, MA 02111-1307, USA.*/#ifndef __GTK_EXTEND_TREE_VIEW_H__#define __GTK_EXTEND_TREE_VIEW_H__#include <glib.h>#include <glib-object.h>#include <gtk/gtktreeview.h>#include <gtk/gtktreeselection.h>#include <gtk/gtkhbox.h>#include <gtk/gtkvbox.h>#include <gtk/gtklabel.h>#include <gtk/gtkstock.h>#include <gtk/gtkbutton.h>G_BEGIN_DECLS#define GTK_TYPE_EXTEND_TREE_VIEW (gtk_extend_tree_view_get_type())#define GTK_EXTEND_TREE_VIEW(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), GTK_TYPE_EXTEND_TREE_VIEW, GtkExtendTreeView))#define GTK_EXTEND_TREE_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_EXTEND_TREE_VIEW, GtkExtendTreeViewClass))#define GTK_IS_EXTEND_TREE_VIEW(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), GTK_TYPE_EXTEND_TREE_VIEW))#define GTK_IS_EXTEND_TREE_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_EXTEND_TREE_VIEW))typedef struct _GtkExtendTreeView GtkExtendTreeView;typedef struct _GtkExtendTreeViewClass GtkExtendTreeViewClass;struct _GtkExtendTreeView{GtkTreeView parent;GtkWidget* toolbar;};struct _GtkExtendTreeViewClass{GtkTreeViewClass parent_class;};/* Used to implement object-GTK, provides the type of the created widget */GType gtk_extend_tree_view_get_type(void) G_GNUC_CONST;/* Creates a new GtkTableGrid widget */GtkWidget* gtk_extend_tree_view_new(void);G_END_DECLS#endif /* __GTK_EXTEND_TREE_VIEW_H__ */
gtkextendtreeview.c
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/* GTK - The GIMP Toolkit* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald** This library is free software; you can redistribute it and/or* modify it under the terms of the GNU Library 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* Library General Public License for more details.** You should have received a copy of the GNU Library General Public* License along with this library; if not, write to the* Free Software Foundation, Inc., 59 Temple Place - Suite 330,* Boston, MA 02111-1307, USA.*/#include "gtkextendtreeview.h"/* Static pointer to parent class of GtkExtendTreeView */static GtkTreeViewClass* parent_class;static void gtk_extend_tree_view_set_property(GObject* object, guint prop_id, const GValue *value, GParamSpec* pspec){switch(prop_id){//TODO: Implements setting propertiesbreak;default: /* invalid property */G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);}}static void gtk_extend_tree_view_get_property(GObject* object, guint prop_id, GValue* value, GParamSpec* pspec){switch(prop_id){//TODO: Implements getting propertiesdefault: /* invalid property */G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);}}static void gtk_extend_tree_view_realize(GtkWidget* const widget){/* Invokes the method realize the parent class */GTK_WIDGET_CLASS(parent_class)->realize(widget);/* Retrieve a reference to the toolbar */GtkWidget* const toolbar = GTK_EXTEND_TREE_VIEW(widget)->toolbar;if(gtk_widget_get_parent(toolbar) != widget){gtk_widget_freeze_child_notify (toolbar);gtk_widget_set_parent (toolbar, widget);gtk_widget_thaw_child_notify (toolbar);}}static void gtk_extend_tree_view_show(GtkWidget* const widget){GTK_WIDGET_CLASS(parent_class)->show(widget);gtk_widget_show(GTK_EXTEND_TREE_VIEW(widget)->toolbar);}static void gtk_extend_tree_view_map(GtkWidget* const widget){GTK_WIDGET_CLASS(parent_class)->map(widget);gtk_widget_map(GTK_EXTEND_TREE_VIEW(widget)->toolbar);}static void gtk_extend_tree_view_size_request(GtkWidget* const widget, GtkRequisition* const requisition){/* Invokes the method size request the parent class */GTK_WIDGET_CLASS(parent_class)->size_request(widget,requisition);/* Retrieve a reference to the toolbar */GtkWidget* const toolbar = GTK_EXTEND_TREE_VIEW(widget)->toolbar;/* Check that the toolbar is visible */if(gtk_widget_get_visible(toolbar)){/* Declare a structure to retrieve the required size from the toolbar */GtkRequisition toolbar_requisition;/* Recovery required size of the toolbar */gtk_widget_size_request(toolbar,&toolbar_requisition);/* Add the required height from the tree view, the request from the toolbar */requisition->height += toolbar_requisition.height;/* If the toolbar requires a width greater than that of the tree view, the value of required width is reimposed */if(toolbar_requisition.width>requisition->width)requisition->width = toolbar_requisition.width;}/* Are added to the size to be requested also those relating to the thickness of the border */requisition->width += GTK_CONTAINER(widget)->border_width * 2;requisition->height += GTK_CONTAINER(widget)->border_width * 2;}static void gtk_extend_tree_view_size_allocate(GtkWidget* const widget, GtkAllocation* const allocation){/* Retrieve a reference to the toolbar */GtkWidget* const toolbar = GTK_EXTEND_TREE_VIEW(widget)->toolbar;/* Invokes the method size allocation the parent class */GTK_WIDGET_CLASS(parent_class)->size_allocate(widget,allocation);/* Check that the toolbar is visible */if(gtk_widget_get_visible(toolbar)){/* Declares two structures to represent the size and location of the toolbar */GtkRequisition toolbar_requisition;GtkAllocation toolbar_allocation;/* Retrieve the size of the tree view border */const guint16 border = GTK_CONTAINER(widget)->border_width;/* Sets the toolbar width, if it's greater than zero and equal to the difference between the tree view width and twice of the tree view border */toolbar_allocation.width = (gint) allocation->width - (gint) border * 2;if(toolbar_allocation.width<1)toolbar_allocation.width=1;/* Set the horizontal distance of the toolbar */toolbar_allocation.x = allocation->x + border;/* Recovery required size of the toolbar */gtk_widget_get_child_requisition(toolbar, &toolbar_requisition);/* Imposed on the value of the height of the toolbar, equal to the height required if this is greater than zero */toolbar_allocation.height = toolbar_requisition.height<1?1:toolbar_requisition.height;/* Set the vertical distance of the toolbar */toolbar_allocation.y = allocation->y + allocation->height - border + toolbar_requisition.height;/* Allocate the new size of the toolbar */gtk_widget_size_allocate (toolbar, &toolbar_allocation);}}static void gtk_extend_tree_view_forall(GtkContainer* const container, const gboolean include_internals, GtkCallback callback, gpointer const callback_data){/* Invokes the method forall of the parent class */GTK_CONTAINER_CLASS(parent_class)->forall(container,include_internals,callback,callback_data);/* Check if the callback should be applied also to the internal child */if(include_internals){/* Invokes the callback for the toolbar of the tree view */(*callback) (GTK_EXTEND_TREE_VIEW(container)->toolbar, callback_data);}}/* Internal Widget Implementation ::: Initializes the widget class */static void gtk_extend_tree_view_class_init(GtkExtendTreeViewClass* const klass){/* GObject signals */GObjectClass* const o_klass = G_OBJECT_CLASS(klass);o_klass->set_property = gtk_extend_tree_view_set_property;o_klass->get_property = gtk_extend_tree_view_get_property;GtkContainerClass* const c_klass = GTK_CONTAINER_CLASS(klass);c_klass->forall = gtk_extend_tree_view_forall;/* GtkWidget signals */GtkWidgetClass* const w_klass = GTK_WIDGET_CLASS(klass);w_klass->realize = gtk_extend_tree_view_realize;w_klass->show = gtk_extend_tree_view_show;w_klass->map = gtk_extend_tree_view_map;w_klass->size_request = gtk_extend_tree_view_size_request;w_klass->size_allocate = gtk_extend_tree_view_size_allocate;/* Store in global variable the reference to object class of the widget */parent_class = g_type_class_peek_parent(klass);/* GtkExtendTreeView Signals *///TODO: Install signals/* GtkExtendTreeView Properties *///TODO: Install properties}static void gtk_extend_tree_view_init(GtkExtendTreeView* const widget){//FIXME: This button is only an example widget that will later be replaced by a// toolbar with various buttons for various functions of the class.widget->toolbar = gtk_button_new_from_stock(GTK_STOCK_ABOUT);}/* Internal Widget Implementation ::: Return the GtkExtendTreeView type */GType gtk_extend_tree_view_get_type(void){static GType gtk_extend_tree_view_type = 0;if(!gtk_extend_tree_view_type){const GTypeInfo gtk_extend_tree_view_info = {sizeof (GtkExtendTreeViewClass),NULL, /* base_init */NULL, /* base_finalize */(GClassInitFunc) gtk_extend_tree_view_class_init,NULL, /* class_finalize */NULL, /* class_data */sizeof (GtkExtendTreeView),0,(GInstanceInitFunc) gtk_extend_tree_view_init,};gtk_extend_tree_view_type = g_type_register_static (GTK_TYPE_TREE_VIEW, "GtkExtendTreeView", >k_extend_tree_view_info, 0);}return gtk_extend_tree_view_type;}/* Creates a new GtkExtendTreeView widget */GtkWidget* gtk_extend_tree_view_new(){return g_object_new(GTK_TYPE_EXTEND_TREE_VIEW,NULL);}
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