hooked up zooming to the background context menu

      hooked up zooming to the background context menu

ChangeLog-20000414

+2000-01-27  Andy Hertzfeld <andy@eazel.com>
+
+        hooked zooming up to the background context menu; right now the canvas item
+        doesn't work at different zoom levels properly, which we'll fix soon.
+        
+        * libnautilus/fm-directory-view.c,h:
+        enable zoom in and zoom out items and hooked them up to callback
+        added a bump_zoom_level slot, to be overriden by subclasses, which the zoom callback use
+        
+        * libnautilus/fm-directory-view-icons.c:
+        added method for bump_zoom_index that calls the icon container to do the work
+        
+        * libnautilus/gnome-icon-container-private.h:
+        added a private instance variable for zoom level
+        
+        * libnautilus/gnome-icon-container.c,.h:
+        added methods for get_zoom_level and set_zoom_level
+        
 2000-01-27  Darin Adler  <darin@eazel.com>
 
 	* libnautilus/gnome-icon-container.c:

libnautilus-extensions/gnome-icon-container-private.h

@@ -161,10 +161,26 @@ struct _GnomeIconContainerDetails {
 	/* DnD info.  */
 	GnomeIconContainerDndInfo *dnd_info;
 
+        /* zoom level */
+        gint zoom_level;
+        
         /* default font used to draw labels */
         GdkFont *label_font;
 };
 
+/* Names for Nautilus's different zoom levels, from tiniest items to largest items */
+/* FIXME:  These are also defined in fm-icon-cache.h and shouldn't be in both places */
+
+typedef enum {
+	NAUTILUS_ZOOM_LEVEL_SMALLEST,
+	NAUTILUS_ZOOM_LEVEL_SMALLER,
+	NAUTILUS_ZOOM_LEVEL_SMALL,
+	NAUTILUS_ZOOM_LEVEL_STANDARD,
+	NAUTILUS_ZOOM_LEVEL_LARGE,
+	NAUTILUS_ZOOM_LEVEL_LARGER,
+	NAUTILUS_ZOOM_LEVEL_LARGEST
+} NautilusZoomLevel;
+
 /* Layout and icon size constants.
    These will change based on the zoom level eventually, so they
    should probably become function calls instead of macros.

libnautilus-extensions/gnome-icon-container.c

@@ -134,6 +134,7 @@ icon_new_pixbuf (GnomeIconContainer *container,
 	image = nautilus_icons_controller_get_icon_image (details->controller, data);
 	name = nautilus_icons_controller_get_icon_name (details->controller, data);
 	
+        
         new->item = gnome_canvas_item_new
 			(GNOME_CANVAS_GROUP (canvas->root),
 			nautilus_icons_view_icon_item_get_type (),
@@ -142,6 +143,7 @@ icon_new_pixbuf (GnomeIconContainer *container,
 			"x", (gdouble) 0,
 			"y", (gdouble) 0,	 
                         NULL);
+                        
 	g_free (name);
         
 	return new;
@@ -1642,7 +1644,8 @@ destroy (GtkObject *object)
 	icon_grid_destroy (container->details->grid);
 	g_hash_table_destroy (container->details->canvas_item_to_icon);
 	unschedule_kbd_icon_visibility (container);
-	if (container->details->idle_id != 0)
+	
+        if (container->details->idle_id != 0)
 		gtk_idle_remove (container->details->idle_id);
 	if (container->details->linger_selection_mode_timer_tag != -1)
 		gtk_timeout_remove (container->details->linger_selection_mode_timer_tag);
@@ -2029,6 +2032,7 @@ gnome_icon_container_initialize (GnomeIconContainer *container)
 	details->kbd_icon_visibility_timer_tag = -1;
 	details->linger_selection_mode_timer_tag = -1;
         
+        details->zoom_level = NAUTILUS_ZOOM_LEVEL_STANDARD;
         /* FIXME: soon we'll need fonts at multiple sizes */
         details->label_font = gdk_font_load("-bitstream-charter-medium-r-normal-*-12-*-*-*-*-*-*-*"); 	
 
@@ -2336,6 +2340,32 @@ gnome_icon_container_add_auto (GnomeIconContainer *container,
 	add_idle (container);
 }
 
+/* zooming */
+gint
+gnome_icon_container_get_zoom_level(GnomeIconContainer *container)
+{
+        return container->details->zoom_level;
+}
+
+void
+gnome_icon_container_set_zoom_level(GnomeIconContainer *container, gint new_level)
+{
+        gint pinned_level = new_level;
+	double zoom_levels[7] = { 0.25, 0.50, 0.75, 1.0, 1.5, 2.0, 4.0 };
+
+        if (pinned_level < NAUTILUS_ZOOM_LEVEL_SMALLEST)
+            pinned_level = NAUTILUS_ZOOM_LEVEL_SMALLEST;
+        else if (pinned_level > NAUTILUS_ZOOM_LEVEL_LARGEST)
+            pinned_level = NAUTILUS_ZOOM_LEVEL_LARGEST;
+ 
+        if (pinned_level != container->details->zoom_level)
+          {
+            container->details->zoom_level = pinned_level;
+	    gnome_canvas_set_pixels_per_unit(GNOME_CANVAS(container), zoom_levels[pinned_level]);
+
+          }       
+}
+
 
 /**
  * gnome_icon_container_relayout:

libnautilus-extensions/gnome-icon-container.h

@@ -85,6 +85,9 @@ void       gnome_icon_container_line_up                 (GnomeIconContainer
 
 GList *    gnome_icon_container_get_selection           (GnomeIconContainer      *view);
 
+gint       gnome_icon_container_get_zoom_level          (GnomeIconContainer      *view);
+void       gnome_icon_container_set_zoom_level          (GnomeIconContainer      *view, gint new_zoom_level);
+
 void       gnome_icon_container_unselect_all            (GnomeIconContainer      *view);
 void       gnome_icon_container_select_all              (GnomeIconContainer      *view);
 

libnautilus-private/gnome-icon-container-private.h

@@ -161,10 +161,26 @@ struct _GnomeIconContainerDetails {
 	/* DnD info.  */
 	GnomeIconContainerDndInfo *dnd_info;
 
+        /* zoom level */
+        gint zoom_level;
+        
         /* default font used to draw labels */
         GdkFont *label_font;
 };
 
+/* Names for Nautilus's different zoom levels, from tiniest items to largest items */
+/* FIXME:  These are also defined in fm-icon-cache.h and shouldn't be in both places */
+
+typedef enum {
+	NAUTILUS_ZOOM_LEVEL_SMALLEST,
+	NAUTILUS_ZOOM_LEVEL_SMALLER,
+	NAUTILUS_ZOOM_LEVEL_SMALL,
+	NAUTILUS_ZOOM_LEVEL_STANDARD,
+	NAUTILUS_ZOOM_LEVEL_LARGE,
+	NAUTILUS_ZOOM_LEVEL_LARGER,
+	NAUTILUS_ZOOM_LEVEL_LARGEST
+} NautilusZoomLevel;
+
 /* Layout and icon size constants.
    These will change based on the zoom level eventually, so they
    should probably become function calls instead of macros.

libnautilus-private/gnome-icon-container.c

@@ -134,6 +134,7 @@ icon_new_pixbuf (GnomeIconContainer *container,
 	image = nautilus_icons_controller_get_icon_image (details->controller, data);
 	name = nautilus_icons_controller_get_icon_name (details->controller, data);
 	
+        
         new->item = gnome_canvas_item_new
 			(GNOME_CANVAS_GROUP (canvas->root),
 			nautilus_icons_view_icon_item_get_type (),
@@ -142,6 +143,7 @@ icon_new_pixbuf (GnomeIconContainer *container,
 			"x", (gdouble) 0,
 			"y", (gdouble) 0,	 
                         NULL);
+                        
 	g_free (name);
         
 	return new;
@@ -1642,7 +1644,8 @@ destroy (GtkObject *object)
 	icon_grid_destroy (container->details->grid);
 	g_hash_table_destroy (container->details->canvas_item_to_icon);
 	unschedule_kbd_icon_visibility (container);
-	if (container->details->idle_id != 0)
+	
+        if (container->details->idle_id != 0)
 		gtk_idle_remove (container->details->idle_id);
 	if (container->details->linger_selection_mode_timer_tag != -1)
 		gtk_timeout_remove (container->details->linger_selection_mode_timer_tag);
@@ -2029,6 +2032,7 @@ gnome_icon_container_initialize (GnomeIconContainer *container)
 	details->kbd_icon_visibility_timer_tag = -1;
 	details->linger_selection_mode_timer_tag = -1;
         
+        details->zoom_level = NAUTILUS_ZOOM_LEVEL_STANDARD;
         /* FIXME: soon we'll need fonts at multiple sizes */
         details->label_font = gdk_font_load("-bitstream-charter-medium-r-normal-*-12-*-*-*-*-*-*-*"); 	
 
@@ -2336,6 +2340,32 @@ gnome_icon_container_add_auto (GnomeIconContainer *container,
 	add_idle (container);
 }
 
+/* zooming */
+gint
+gnome_icon_container_get_zoom_level(GnomeIconContainer *container)
+{
+        return container->details->zoom_level;
+}
+
+void
+gnome_icon_container_set_zoom_level(GnomeIconContainer *container, gint new_level)
+{
+        gint pinned_level = new_level;
+	double zoom_levels[7] = { 0.25, 0.50, 0.75, 1.0, 1.5, 2.0, 4.0 };
+
+        if (pinned_level < NAUTILUS_ZOOM_LEVEL_SMALLEST)
+            pinned_level = NAUTILUS_ZOOM_LEVEL_SMALLEST;
+        else if (pinned_level > NAUTILUS_ZOOM_LEVEL_LARGEST)
+            pinned_level = NAUTILUS_ZOOM_LEVEL_LARGEST;
+ 
+        if (pinned_level != container->details->zoom_level)
+          {
+            container->details->zoom_level = pinned_level;
+	    gnome_canvas_set_pixels_per_unit(GNOME_CANVAS(container), zoom_levels[pinned_level]);
+
+          }       
+}
+
 
 /**
  * gnome_icon_container_relayout:

libnautilus-private/gnome-icon-container.h

@@ -85,6 +85,9 @@ void       gnome_icon_container_line_up                 (GnomeIconContainer
 
 GList *    gnome_icon_container_get_selection           (GnomeIconContainer      *view);
 
+gint       gnome_icon_container_get_zoom_level          (GnomeIconContainer      *view);
+void       gnome_icon_container_set_zoom_level          (GnomeIconContainer      *view, gint new_zoom_level);
+
 void       gnome_icon_container_unselect_all            (GnomeIconContainer      *view);
 void       gnome_icon_container_select_all              (GnomeIconContainer      *view);
 

libnautilus/gnome-icon-container-private.h

@@ -161,10 +161,26 @@ struct _GnomeIconContainerDetails {
 	/* DnD info.  */
 	GnomeIconContainerDndInfo *dnd_info;
 
+        /* zoom level */
+        gint zoom_level;
+        
         /* default font used to draw labels */
         GdkFont *label_font;
 };
 
+/* Names for Nautilus's different zoom levels, from tiniest items to largest items */
+/* FIXME:  These are also defined in fm-icon-cache.h and shouldn't be in both places */
+
+typedef enum {
+	NAUTILUS_ZOOM_LEVEL_SMALLEST,
+	NAUTILUS_ZOOM_LEVEL_SMALLER,
+	NAUTILUS_ZOOM_LEVEL_SMALL,
+	NAUTILUS_ZOOM_LEVEL_STANDARD,
+	NAUTILUS_ZOOM_LEVEL_LARGE,
+	NAUTILUS_ZOOM_LEVEL_LARGER,
+	NAUTILUS_ZOOM_LEVEL_LARGEST
+} NautilusZoomLevel;
+
 /* Layout and icon size constants.
    These will change based on the zoom level eventually, so they
    should probably become function calls instead of macros.

libnautilus/gnome-icon-container.c

@@ -134,6 +134,7 @@ icon_new_pixbuf (GnomeIconContainer *container,
 	image = nautilus_icons_controller_get_icon_image (details->controller, data);
 	name = nautilus_icons_controller_get_icon_name (details->controller, data);
 	
+        
         new->item = gnome_canvas_item_new
 			(GNOME_CANVAS_GROUP (canvas->root),
 			nautilus_icons_view_icon_item_get_type (),
@@ -142,6 +143,7 @@ icon_new_pixbuf (GnomeIconContainer *container,
 			"x", (gdouble) 0,
 			"y", (gdouble) 0,	 
                         NULL);
+                        
 	g_free (name);
         
 	return new;
@@ -1642,7 +1644,8 @@ destroy (GtkObject *object)
 	icon_grid_destroy (container->details->grid);
 	g_hash_table_destroy (container->details->canvas_item_to_icon);
 	unschedule_kbd_icon_visibility (container);
-	if (container->details->idle_id != 0)
+	
+        if (container->details->idle_id != 0)
 		gtk_idle_remove (container->details->idle_id);
 	if (container->details->linger_selection_mode_timer_tag != -1)
 		gtk_timeout_remove (container->details->linger_selection_mode_timer_tag);
@@ -2029,6 +2032,7 @@ gnome_icon_container_initialize (GnomeIconContainer *container)
 	details->kbd_icon_visibility_timer_tag = -1;
 	details->linger_selection_mode_timer_tag = -1;
         
+        details->zoom_level = NAUTILUS_ZOOM_LEVEL_STANDARD;
         /* FIXME: soon we'll need fonts at multiple sizes */
         details->label_font = gdk_font_load("-bitstream-charter-medium-r-normal-*-12-*-*-*-*-*-*-*"); 	
 
@@ -2336,6 +2340,32 @@ gnome_icon_container_add_auto (GnomeIconContainer *container,
 	add_idle (container);
 }
 
+/* zooming */
+gint
+gnome_icon_container_get_zoom_level(GnomeIconContainer *container)
+{
+        return container->details->zoom_level;
+}
+
+void
+gnome_icon_container_set_zoom_level(GnomeIconContainer *container, gint new_level)
+{
+        gint pinned_level = new_level;
+	double zoom_levels[7] = { 0.25, 0.50, 0.75, 1.0, 1.5, 2.0, 4.0 };
+
+        if (pinned_level < NAUTILUS_ZOOM_LEVEL_SMALLEST)
+            pinned_level = NAUTILUS_ZOOM_LEVEL_SMALLEST;
+        else if (pinned_level > NAUTILUS_ZOOM_LEVEL_LARGEST)
+            pinned_level = NAUTILUS_ZOOM_LEVEL_LARGEST;
+ 
+        if (pinned_level != container->details->zoom_level)
+          {
+            container->details->zoom_level = pinned_level;
+	    gnome_canvas_set_pixels_per_unit(GNOME_CANVAS(container), zoom_levels[pinned_level]);
+
+          }       
+}
+
 
 /**
  * gnome_icon_container_relayout:

libnautilus/gnome-icon-container.h

@@ -85,6 +85,9 @@ void       gnome_icon_container_line_up                 (GnomeIconContainer
 
 GList *    gnome_icon_container_get_selection           (GnomeIconContainer      *view);
 
+gint       gnome_icon_container_get_zoom_level          (GnomeIconContainer      *view);
+void       gnome_icon_container_set_zoom_level          (GnomeIconContainer      *view, gint new_zoom_level);
+
 void       gnome_icon_container_unselect_all            (GnomeIconContainer      *view);
 void       gnome_icon_container_select_all              (GnomeIconContainer      *view);
 

src/file-manager/fm-directory-view-icons.c

@@ -61,6 +61,8 @@ static void fm_directory_view_icons_background_changed_cb (NautilusBackground *b
 							   FMDirectoryViewIcons *icon_view);
 static void fm_directory_view_icons_begin_loading
 				          	 (FMDirectoryView *view);
+static void fm_directory_view_icons_bump_zoom_level
+				          	 (FMDirectoryView *view, gint zoom_increment);
 static void fm_directory_view_icons_clear 	 (FMDirectoryView *view);
 static void fm_directory_view_icons_destroy      (GtkObject *view);
 static void fm_directory_view_icons_done_adding_entries 
@@ -114,14 +116,17 @@ fm_directory_view_icons_initialize_class (FMDirectoryViewIconsClass *klass)
 		= fm_directory_view_icons_begin_loading;
 	fm_directory_view_class->get_selection 
 		= fm_directory_view_icons_get_selection;	
+	fm_directory_view_class->bump_zoom_level 
+		= fm_directory_view_icons_bump_zoom_level;	
+
 }
 
 static void
 fm_directory_view_icons_initialize (FMDirectoryViewIcons *icon_view)
 {
 	GnomeIconContainer *icon_container;
-
-	g_return_if_fail (GTK_BIN (icon_view)->child == NULL);
+        
+        g_return_if_fail (GTK_BIN (icon_view)->child == NULL);
 
 	icon_view->details = g_new0 (FMDirectoryViewIconsDetails, 1);
 
@@ -290,6 +295,15 @@ fm_directory_view_icons_begin_loading (FMDirectoryView *view)
 {
 }
 
+static void
+fm_directory_view_icons_bump_zoom_level (FMDirectoryView *view, gint zoom_increment)
+{
+  GnomeIconContainer *icon_container = get_icon_container(FM_DIRECTORY_VIEW_ICONS (view));
+  gint current_zoom_level = gnome_icon_container_get_zoom_level(icon_container);
+  
+  gnome_icon_container_set_zoom_level(icon_container, current_zoom_level + zoom_increment);
+}
+
 static GList *
 fm_directory_view_icons_get_selection (FMDirectoryView *view)
 {

src/file-manager/fm-directory-view.c

@@ -93,11 +93,14 @@ static void notify_location_change_cb 		(NautilusViewFrame *view_frame,
 						 Nautilus_NavigationInfo *nav_context, 
 						 FMDirectoryView *directory_view);
 static void fm_directory_view_repopulate        (FMDirectoryView *view);
+static void zoom_in_cb                          (GtkMenuItem *item, FMDirectoryView *directory_view);
+static void zoom_out_cb                         (GtkMenuItem *item, FMDirectoryView *directory_view);
 
 NAUTILUS_DEFINE_CLASS_BOILERPLATE (FMDirectoryView, fm_directory_view, GTK_TYPE_SCROLLED_WINDOW)
 NAUTILUS_IMPLEMENT_MUST_OVERRIDE_SIGNAL (fm_directory_view, add_entry)
 NAUTILUS_IMPLEMENT_MUST_OVERRIDE_SIGNAL (fm_directory_view, clear)
 NAUTILUS_IMPLEMENT_MUST_OVERRIDE_SIGNAL (fm_directory_view, get_selection)
+NAUTILUS_IMPLEMENT_MUST_OVERRIDE_SIGNAL (fm_directory_view, bump_zoom_level)
 
 static void
 fm_directory_view_initialize_class (FMDirectoryViewClass *klass)
@@ -147,6 +150,7 @@ fm_directory_view_initialize_class (FMDirectoryViewClass *klass)
 	NAUTILUS_ASSIGN_MUST_OVERRIDE_SIGNAL (klass, fm_directory_view, add_entry);
 	NAUTILUS_ASSIGN_MUST_OVERRIDE_SIGNAL (klass, fm_directory_view, clear);
 	NAUTILUS_ASSIGN_MUST_OVERRIDE_SIGNAL (klass, fm_directory_view, get_selection);
+	NAUTILUS_ASSIGN_MUST_OVERRIDE_SIGNAL (klass, fm_directory_view, bump_zoom_level);
 }
 
 static void
@@ -358,6 +362,19 @@ stop_load (FMDirectoryView *view, gboolean error)
 
 
 
+/* handle the zoom in/out menu items */
+
+static void
+zoom_in_cb(GtkMenuItem *item, FMDirectoryView *directory_view)
+{
+    fm_directory_view_bump_zoom_level (directory_view, 1);
+}
+
+static void
+zoom_out_cb(GtkMenuItem *item, FMDirectoryView *directory_view)
+{
+    fm_directory_view_bump_zoom_level (directory_view, -1);
+}
 
 /**
  * fm_directory_view_repopulate:
@@ -586,6 +603,20 @@ fm_directory_view_begin_loading (FMDirectoryView *view)
 	gtk_signal_emit (GTK_OBJECT (view), fm_directory_view_signals[BEGIN_LOADING]);
 }
 
+/**
+ * fm_directory_view_bump_zoom_level:
+ *
+ * bump the current zoom level by invoking the relevant subclass through the slot
+ * 
+ **/
+void
+fm_directory_view_bump_zoom_level (FMDirectoryView *view, gint zoom_increment)
+{
+	g_return_if_fail (FM_IS_DIRECTORY_VIEW (view));
+
+	(* FM_DIRECTORY_VIEW_CLASS (GTK_OBJECT (view)->klass)->bump_zoom_level) (view, zoom_increment);
+}
+
 /**
  * fm_directory_view_get_selection:
  *
@@ -700,13 +731,17 @@ create_background_context_menu (FMDirectoryView *view)
 	gtk_menu_append (menu, menu_item);
 
 	menu_item = gtk_menu_item_new_with_label ("Zoom in");
-	gtk_widget_set_sensitive (menu_item, FALSE);
+	gtk_signal_connect(GTK_OBJECT (menu_item), "activate",
+		           GTK_SIGNAL_FUNC (zoom_in_cb), view);