2010-10-12 Marco Diego Aurélio Mesquita <marcodiegomesquita@gmail.com>

	Implemented preview feature for Glade.

	* gladeui/Makefile.am, gladeui/glade-previewer.c: Added program to preview
	  glade files.

	* gladeui/glade-project.[ch]: Implemented glade_project_preview() to spawn a
	  child preview process, reap it when it dies and close all previews when
	  project closes.

	* src/glade-window.c: Added toolbar button to spawn the preview.

	* gladeui/glade-xml-utils.[ch]: Added glade_xml_dump_from_context().

	* plugins/gtk+/glade-gtk.c, plugins/gtk+/gtk+.xml.in: Added actions to preview a widget.

	* gladeui/glade-app.[ch]: Added glade_app_get_bin_dir() for resolving of previewer path.

1 files changed, 85 insertions, 2 deletions

diff --git a/src/glade-window.c b/src/glade-window.c
index f88c55ef..2ddfdbc7 100644
--- a/src/glade-window.c
+++ b/src/glade-window.c
@@ -33,6 +33,8 @@
 #include <gladeui/glade-popup.h>
 #include <gladeui/glade-inspector.h>
 
+#include <gladeui/glade-project.h>
+
 #include <string.h>
 #include <glib/gstdio.h>
 #include <glib/gi18n.h>
@@ -117,6 +119,7 @@ struct _GladeWindowPrivate
 	gchar               *default_path;         /* the default path for open/save operations */
 	
 	GtkToggleToolButton *selector_button;      /* the widget selector button (replaces the one in the palette) */
+	GtkToolButton       *preview_button;	   /* the project preview button (replaces the one in the palette) */
 	GtkToggleToolButton *drag_resize_button;   /* sets the pointer to drag/resize mode */
 	gboolean             setting_pointer_mode; /* avoid feedback signal loops */
 
@@ -782,6 +785,50 @@ on_selector_button_toggled (GtkToggleToolButton *button, GladeWindow *window)
 }
 
 static void
+on_preview_button_clicked (GtkToggleToolButton *button, GladeWindow *window)
+{
+	GladeProject *project;
+
+	const GList *objects;
+
+	GtkWidget *widget = NULL;
+	GtkWidget *window_to_preview = NULL;
+	GladeWidget *glade_widget = NULL;
+
+	project = glade_design_view_get_project (window->priv->active_view);
+
+	if (project == NULL)
+		return;
+
+	objects = glade_project_get_objects (project);
+
+	while (objects != NULL)
+	{
+		if (GTK_IS_WIDGET (objects->data))
+		{
+			widget = GTK_WIDGET(objects->data);
+			if (GTK_IS_WINDOW (widget)) 
+			{
+				window_to_preview = widget;
+				break;
+			}
+		}
+		objects = objects->next;
+	}
+
+	if (widget != NULL)
+	{
+		glade_widget = glade_widget_get_from_gobject (G_OBJECT (widget));
+	}
+
+	if (window_to_preview != NULL) widget = window_to_preview;
+	glade_project_preview (project,
+			       glade_widget_get_from_gobject((gpointer)widget)
+			      );
+}
+
+
+static void
 on_drag_resize_button_toggled (GtkToggleToolButton *button, GladeWindow *window)
 {
 	if (window->priv->setting_pointer_mode)
@@ -2355,6 +2402,24 @@ create_selector_tool_button (GtkToolbar *toolbar)
 }
 
 static GtkWidget *
+create_preview_tool_button (GtkToolbar *toolbar)
+{
+	GtkToolItem  *button;
+	button = gtk_tool_button_new_from_stock (GTK_STOCK_EXECUTE);
+	gtk_tool_button_set_label (GTK_TOOL_BUTTON(button), _("Preview snapshot"));
+
+	gtk_tool_item_set_tooltip (GTK_TOOL_ITEM (button),
+				   toolbar->tooltips,
+				   _("Previews snapshot of project"),
+				   NULL);
+
+	gtk_widget_show (GTK_WIDGET (button));
+
+	return GTK_WIDGET (button);
+}
+
+
+static GtkWidget *
 create_drag_resize_tool_button (GtkToolbar *toolbar)
 {
 	GtkToolItem  *button;
@@ -2466,6 +2531,10 @@ add_project (GladeWindow *window, GladeProject *project)
 
 	/* Kick the inspector in the balls here... */
 	glade_project_selection_changed (project);
+
+	/* Update preview button */
+	gtk_widget_set_sensitive ( GTK_WIDGET (window->priv->preview_button),
+					       glade_project_get_previewable (project));
 }
 
 void
@@ -2704,9 +2773,15 @@ refresh_undo_redo (GladeWindow *window)
 
 static void
 update_ui (GladeApp *app, GladeWindow *window)
-{      
+{
+	GladeProject *project;
 	if (window->priv->active_view)
+	{
+		project = glade_design_view_get_project (window->priv->active_view);
+		gtk_widget_set_sensitive ( GTK_WIDGET (window->priv->preview_button),
+					   glade_project_get_previewable (project));
 		gtk_widget_queue_draw (GTK_WIDGET (window->priv->active_view));
+	}
 
 	refresh_undo_redo (window);
 
@@ -3267,10 +3342,16 @@ glade_window_init (GladeWindow *window)
 	gtk_toolbar_insert (GTK_TOOLBAR (priv->toolbar), GTK_TOOL_ITEM (sep), -1);
 
 	priv->selector_button = 
-		GTK_TOGGLE_TOOL_BUTTON (create_selector_tool_button (GTK_TOOLBAR (priv->toolbar)));	
+		GTK_TOGGLE_TOOL_BUTTON (create_selector_tool_button (GTK_TOOLBAR (priv->toolbar)));
 	gtk_toolbar_insert (GTK_TOOLBAR (priv->toolbar), 
 			    GTK_TOOL_ITEM (priv->selector_button), -1);
 
+	priv->preview_button =
+		GTK_TOOL_BUTTON (create_preview_tool_button (GTK_TOOLBAR (priv->toolbar)));
+	gtk_toolbar_insert (GTK_TOOLBAR (priv->toolbar),
+			    GTK_TOOL_ITEM (priv->preview_button), -1);
+	gtk_widget_set_sensitive (GTK_WIDGET (priv->preview_button), FALSE);
+
 	priv->drag_resize_button = 
 		GTK_TOGGLE_TOOL_BUTTON (create_drag_resize_tool_button 
 					(GTK_TOOLBAR (priv->toolbar)));	
@@ -3282,6 +3363,8 @@ glade_window_init (GladeWindow *window)
 
 	g_signal_connect (G_OBJECT (priv->selector_button), "toggled",
 			  G_CALLBACK (on_selector_button_toggled), window);
+	g_signal_connect (G_OBJECT (priv->preview_button), "clicked",
+			  G_CALLBACK (on_preview_button_clicked), window);
 	g_signal_connect (G_OBJECT (priv->drag_resize_button), "toggled",
 			  G_CALLBACK (on_drag_resize_button_toggled), window);
 	g_signal_connect (G_OBJECT (glade_app_get()), "notify::pointer-mode",