[darcs-to-svn @ initial import]

svn path=/trunk/; revision=2

1 files changed, 482 insertions, 0 deletions

diff --git a/libempathy-gtk/gossip-cell-renderer-expander.c b/libempathy-gtk/gossip-cell-renderer-expander.c
new file mode 100644
index 000000000..e116ace7b
--- /dev/null
+++ b/libempathy-gtk/gossip-cell-renderer-expander.c
@@ -0,0 +1,482 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*
+ * Copyright (C) 2006-2007 Imendio AB
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ * 
+ * Authors: Kristian Rietveld <kris@imendio.com>
+ */
+
+/* To do:
+ *  - should probably cancel animation if model changes
+ *  - need to handle case where node-in-animation is removed
+ *  - it only handles a single animation at a time; but I guess users
+ *    aren't fast enough to trigger two or more animations at once anyway :P
+ *    (could guard for this by just cancelling the "old" animation, and
+ *     start the new one).
+ */
+
+#include <gtk/gtktreeview.h>
+
+#include "gossip-cell-renderer-expander.h"
+
+#define GET_PRIV(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GOSSIP_TYPE_CELL_RENDERER_EXPANDER, GossipCellRendererExpanderPriv))
+
+static void     gossip_cell_renderer_expander_init         (GossipCellRendererExpander      *expander);
+static void     gossip_cell_renderer_expander_class_init   (GossipCellRendererExpanderClass *klass);
+static void     gossip_cell_renderer_expander_get_property (GObject                         *object,
+							    guint                            param_id,
+							    GValue                          *value,
+							    GParamSpec                      *pspec);
+static void     gossip_cell_renderer_expander_set_property (GObject                         *object,
+							    guint                            param_id,
+							    const GValue                    *value,
+							    GParamSpec                      *pspec);
+static void     gossip_cell_renderer_expander_finalize     (GObject                         *object);
+static void     gossip_cell_renderer_expander_get_size     (GtkCellRenderer                 *cell,
+							    GtkWidget                       *widget,
+							    GdkRectangle                    *cell_area,
+							    gint                            *x_offset,
+							    gint                            *y_offset,
+							    gint                            *width,
+							    gint                            *height);
+static void     gossip_cell_renderer_expander_render       (GtkCellRenderer                 *cell,
+							    GdkWindow                       *window,
+							    GtkWidget                       *widget,
+							    GdkRectangle                    *background_area,
+							    GdkRectangle                    *cell_area,
+							    GdkRectangle                    *expose_area,
+							    GtkCellRendererState             flags);
+static gboolean gossip_cell_renderer_expander_activate     (GtkCellRenderer                 *cell,
+							    GdkEvent                        *event,
+							    GtkWidget                       *widget,
+							    const gchar                     *path,
+							    GdkRectangle                    *background_area,
+							    GdkRectangle                    *cell_area,
+							    GtkCellRendererState             flags);
+
+enum {
+	PROP_0,
+	PROP_EXPANDER_STYLE,
+	PROP_EXPANDER_SIZE,
+	PROP_ACTIVATABLE
+};
+
+typedef struct _GossipCellRendererExpanderPriv GossipCellRendererExpanderPriv;
+
+struct _GossipCellRendererExpanderPriv {
+	GtkExpanderStyle     expander_style;
+	gint                 expander_size;
+
+	GtkTreeView         *animation_view;
+	GtkTreeRowReference *animation_node;
+	GtkExpanderStyle     animation_style;
+	guint                animation_timeout;
+	GdkRectangle         animation_area;
+
+	guint                activatable : 1;
+	guint                animation_expanding : 1;
+};
+
+G_DEFINE_TYPE (GossipCellRendererExpander, gossip_cell_renderer_expander, GTK_TYPE_CELL_RENDERER)
+
+static void
+gossip_cell_renderer_expander_init (GossipCellRendererExpander *expander)
+{
+	GossipCellRendererExpanderPriv *priv;
+
+	priv = GET_PRIV (expander);
+
+	priv->expander_style = GTK_EXPANDER_COLLAPSED;
+	priv->expander_size = 12;
+	priv->activatable = TRUE;
+	priv->animation_node = NULL;
+
+	GTK_CELL_RENDERER (expander)->xpad = 2;
+	GTK_CELL_RENDERER (expander)->ypad = 2;
+	GTK_CELL_RENDERER (expander)->mode = GTK_CELL_RENDERER_MODE_ACTIVATABLE;
+}
+
+static void
+gossip_cell_renderer_expander_class_init (GossipCellRendererExpanderClass *klass)
+{
+	GObjectClass         *object_class;
+	GtkCellRendererClass *cell_class;
+
+	object_class  = G_OBJECT_CLASS (klass);
+	cell_class = GTK_CELL_RENDERER_CLASS (klass);
+
+	object_class->finalize = gossip_cell_renderer_expander_finalize;
+
+	object_class->get_property = gossip_cell_renderer_expander_get_property;
+	object_class->set_property = gossip_cell_renderer_expander_set_property;
+
+	cell_class->get_size = gossip_cell_renderer_expander_get_size;
+	cell_class->render = gossip_cell_renderer_expander_render;
+	cell_class->activate = gossip_cell_renderer_expander_activate;
+
+	g_object_class_install_property (object_class,
+					 PROP_EXPANDER_STYLE,
+					 g_param_spec_enum ("expander-style",
+							    "Expander Style",
+							    "Style to use when painting the expander",
+							    GTK_TYPE_EXPANDER_STYLE,
+							    GTK_EXPANDER_COLLAPSED,
+							    G_PARAM_READWRITE));
+
+	g_object_class_install_property (object_class,
+					 PROP_EXPANDER_SIZE,
+					 g_param_spec_int ("expander-size",
+							   "Expander Size",
+							   "The size of the expander",
+							   0,
+							   G_MAXINT,
+							   12,
+							   G_PARAM_READWRITE));
+
+	g_object_class_install_property (object_class,
+					 PROP_ACTIVATABLE,
+					 g_param_spec_boolean ("activatable",
+							       "Activatable",
+							       "The expander can be activated",
+							       TRUE,
+							       G_PARAM_READWRITE));
+
+	g_type_class_add_private (object_class, sizeof (GossipCellRendererExpanderPriv));
+}
+
+static void
+gossip_cell_renderer_expander_get_property (GObject    *object,
+					    guint       param_id,
+					    GValue     *value,
+					    GParamSpec *pspec)
+{
+	GossipCellRendererExpander     *expander;
+	GossipCellRendererExpanderPriv *priv;
+
+	expander = GOSSIP_CELL_RENDERER_EXPANDER (object);
+	priv = GET_PRIV (expander);
+
+	switch (param_id) {
+	case PROP_EXPANDER_STYLE:
+		g_value_set_enum (value, priv->expander_style);
+		break;
+
+	case PROP_EXPANDER_SIZE:
+		g_value_set_int (value, priv->expander_size);
+		break;
+
+	case PROP_ACTIVATABLE:
+		g_value_set_boolean (value, priv->activatable);
+		break;
+
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
+		break;
+	}
+}
+
+static void
+gossip_cell_renderer_expander_set_property (GObject      *object,
+					    guint         param_id,
+					    const GValue *value,
+					    GParamSpec   *pspec)
+{
+	GossipCellRendererExpander     *expander;
+	GossipCellRendererExpanderPriv *priv;
+
+	expander = GOSSIP_CELL_RENDERER_EXPANDER (object);
+	priv = GET_PRIV (expander);
+
+	switch (param_id) {
+	case PROP_EXPANDER_STYLE:
+		priv->expander_style = g_value_get_enum (value);
+		break;
+
+	case PROP_EXPANDER_SIZE:
+		priv->expander_size = g_value_get_int (value);
+		break;
+
+	case PROP_ACTIVATABLE:
+		priv->activatable = g_value_get_boolean (value);
+		break;
+
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
+		break;
+	}
+}
+
+static void
+gossip_cell_renderer_expander_finalize (GObject *object)
+{
+	GossipCellRendererExpanderPriv *priv;
+
+	priv = GET_PRIV (object);
+
+	if (priv->animation_timeout) {
+		g_source_remove (priv->animation_timeout);
+		priv->animation_timeout = 0;
+	}
+
+	if (priv->animation_node) {
+		gtk_tree_row_reference_free (priv->animation_node);
+	}
+
+	(* G_OBJECT_CLASS (gossip_cell_renderer_expander_parent_class)->finalize) (object);
+}
+
+GtkCellRenderer *
+gossip_cell_renderer_expander_new (void)
+{
+	return g_object_new (GOSSIP_TYPE_CELL_RENDERER_EXPANDER, NULL);
+}
+
+static void
+gossip_cell_renderer_expander_get_size (GtkCellRenderer *cell,
+					GtkWidget       *widget,
+					GdkRectangle    *cell_area,
+					gint            *x_offset,
+					gint            *y_offset,
+					gint            *width,
+					gint            *height)
+{
+	GossipCellRendererExpander     *expander;
+	GossipCellRendererExpanderPriv *priv;
+
+	expander = (GossipCellRendererExpander*) cell;
+	priv = GET_PRIV (expander);
+
+	if (cell_area) {
+		if (x_offset) {
+			*x_offset = cell->xalign * (cell_area->width - (priv->expander_size + (2 * cell->xpad)));
+			*x_offset = MAX (*x_offset, 0);
+		}
+
+		if (y_offset) {
+			*y_offset = cell->yalign * (cell_area->height - (priv->expander_size + (2 * cell->ypad)));
+			*y_offset = MAX (*y_offset, 0);
+		}
+	} else {
+		if (x_offset)
+			*x_offset = 0;
+
+		if (y_offset)
+			*y_offset = 0;
+	}
+
+	if (width)
+		*width = cell->xpad * 2 + priv->expander_size;
+
+	if (height)
+		*height = cell->ypad * 2 + priv->expander_size;
+}
+
+static void
+gossip_cell_renderer_expander_render (GtkCellRenderer      *cell,
+				      GdkWindow            *window,
+				      GtkWidget            *widget,
+				      GdkRectangle         *background_area,
+				      GdkRectangle         *cell_area,
+				      GdkRectangle         *expose_area,
+				      GtkCellRendererState  flags)
+{
+	GossipCellRendererExpander     *expander;
+	GossipCellRendererExpanderPriv *priv;
+	GtkExpanderStyle                expander_style;
+	gint                            x_offset, y_offset;
+
+	expander = (GossipCellRendererExpander*) cell;
+	priv = GET_PRIV (expander);
+
+	if (priv->animation_node) {
+		GtkTreePath *path;
+		GdkRectangle rect;
+
+		/* Not sure if I like this ... */
+		path = gtk_tree_row_reference_get_path (priv->animation_node);
+		gtk_tree_view_get_background_area (priv->animation_view, path,
+						   NULL, &rect);
+		gtk_tree_path_free (path);
+
+		if (background_area->y == rect.y)
+			expander_style = priv->animation_style;
+		else
+			expander_style = priv->expander_style;
+	} else
+		expander_style = priv->expander_style;
+
+	gossip_cell_renderer_expander_get_size (cell, widget, cell_area,
+						&x_offset, &y_offset,
+						NULL, NULL);
+
+	gtk_paint_expander (widget->style,
+			    window,
+			    GTK_STATE_NORMAL,
+			    expose_area,
+			    widget,
+			    "treeview",
+			    cell_area->x + x_offset + cell->xpad + priv->expander_size / 2,
+			    cell_area->y + y_offset + cell->ypad + priv->expander_size / 2,
+			    expander_style);
+}
+
+static void
+invalidate_node (GtkTreeView *tree_view,
+		 GtkTreePath *path)
+{
+       GdkWindow    *bin_window;
+       GdkRectangle  rect;
+
+       bin_window = gtk_tree_view_get_bin_window (tree_view);
+
+       gtk_tree_view_get_background_area (tree_view, path, NULL, &rect);
+
+       rect.x = 0;
+       rect.width = GTK_WIDGET (tree_view)->allocation.width;
+
+       gdk_window_invalidate_rect (bin_window, &rect, TRUE);
+}
+
+static gboolean
+do_animation (GossipCellRendererExpander *expander)
+{
+	GossipCellRendererExpanderPriv *priv;
+	GtkTreePath                    *path;
+	gboolean                        done = FALSE;
+
+	priv = GET_PRIV (expander);
+
+	if (priv->animation_expanding) {
+		if (priv->animation_style == GTK_EXPANDER_SEMI_COLLAPSED)
+			priv->animation_style = GTK_EXPANDER_SEMI_EXPANDED;
+		else if (priv->animation_style == GTK_EXPANDER_SEMI_EXPANDED) {
+			priv->animation_style = GTK_EXPANDER_EXPANDED;
+			done = TRUE;
+		}
+	} else {
+		if (priv->animation_style == GTK_EXPANDER_SEMI_EXPANDED)
+			priv->animation_style = GTK_EXPANDER_SEMI_COLLAPSED;
+		else if (priv->animation_style == GTK_EXPANDER_SEMI_COLLAPSED) {
+			priv->animation_style = GTK_EXPANDER_COLLAPSED;
+			done = TRUE;
+		}
+	}
+
+	path = gtk_tree_row_reference_get_path (priv->animation_node);
+	invalidate_node (priv->animation_view, path);
+	gtk_tree_path_free (path);
+
+	if (done) {
+		gtk_tree_row_reference_free (priv->animation_node);
+		priv->animation_node = NULL;
+		priv->animation_timeout = 0;
+	}
+
+	return !done;
+}
+
+static gboolean
+animation_timeout (gpointer data)
+{
+	gboolean retval;
+
+	GDK_THREADS_ENTER ();
+
+	retval = do_animation (data);
+
+	GDK_THREADS_LEAVE ();
+
+	return retval;
+}
+
+static void
+gossip_cell_renderer_expander_start_animation (GossipCellRendererExpander *expander,
+					       GtkTreeView                *tree_view,
+					       GtkTreePath                *path,
+					       gboolean                    expanding,
+					       GdkRectangle               *background_area)
+{
+	GossipCellRendererExpanderPriv *priv;
+
+	priv = GET_PRIV (expander);
+
+	if (expanding) {
+		priv->animation_style = GTK_EXPANDER_SEMI_COLLAPSED;
+	} else {
+		priv->animation_style = GTK_EXPANDER_SEMI_EXPANDED;
+	}
+
+	invalidate_node (tree_view, path);
+
+	priv->animation_expanding = expanding;
+	priv->animation_view = tree_view;
+	priv->animation_node = gtk_tree_row_reference_new (gtk_tree_view_get_model (tree_view), path);
+	priv->animation_timeout = g_timeout_add (50, animation_timeout, expander);
+}
+
+static gboolean
+gossip_cell_renderer_expander_activate (GtkCellRenderer      *cell,
+					GdkEvent             *event,
+					GtkWidget            *widget,
+					const gchar          *path_string,
+					GdkRectangle         *background_area,
+					GdkRectangle         *cell_area,
+					GtkCellRendererState  flags)
+{
+	GossipCellRendererExpander     *expander;
+	GossipCellRendererExpanderPriv *priv;
+	GtkTreePath                    *path;
+	gboolean                        animate;
+	gboolean                        expanding;
+
+	expander = GOSSIP_CELL_RENDERER_EXPANDER (cell);
+	priv = GET_PRIV (cell);
+
+	if (!GTK_IS_TREE_VIEW (widget) || !priv->activatable)
+		return FALSE;
+
+	path = gtk_tree_path_new_from_string (path_string);
+
+	if (gtk_tree_path_get_depth (path) > 1) {
+		gtk_tree_path_free (path);
+		return TRUE;
+	}
+
+	g_object_get (gtk_widget_get_settings (GTK_WIDGET (widget)),
+		      "gtk-enable-animations", &animate,
+		      NULL);
+
+	if (gtk_tree_view_row_expanded (GTK_TREE_VIEW (widget), path)) {
+		gtk_tree_view_collapse_row (GTK_TREE_VIEW (widget), path);
+		expanding = FALSE;
+	} else {
+		gtk_tree_view_expand_row (GTK_TREE_VIEW (widget), path, FALSE);
+		expanding = TRUE;
+	}
+
+	if (animate) {
+		gossip_cell_renderer_expander_start_animation (expander,
+							       GTK_TREE_VIEW (widget),
+							       path,
+							       expanding,
+							       background_area);
+	}
+
+	gtk_tree_path_free (path);
+
+	return TRUE;
+}