use the expanded/unexpanded pixbufs as node pixbufs for the first level of

2000-06-23  Chris Toshok  <toshok@helixcode.com>

	* e-tree-example-1.c (create_tree): use the expanded/unexpanded
	pixbufs as node pixbufs for the first level of children, to test
	the drawing.

	* e-tree-model.c (e_tree_model_node_get_closed_pixbuf): new function.
	(e_tree_model_node_get_opened_pixbuf): same.
	(e_tree_model_node_insert): add opened/closed pixbuf argument.
	(e_tree_model_node_insert_before): same.

	* e-tree-model.h: add prototypes for opened/closed pixbuf
	accessors, and add them to the e_tree_model_node_insert_* calls.

	* e-cell-tree.c (ect_draw): add opened/closed pixbuf drawing per node.

svn path=/trunk/; revision=3706

4 files changed, 108 insertions, 31 deletions

diff --git a/widgets/table/e-cell-tree.c b/widgets/table/e-cell-tree.c
index 41eb805cdc..61c86fad2d 100644
--- a/widgets/table/e-cell-tree.c
+++ b/widgets/table/e-cell-tree.c
@@ -167,6 +167,10 @@ ect_draw (ECellView *ecell_view, GdkDrawable *drawable,
 
 	/* only draw the tree effects if we're the active sort */
 	if (/* XXX */ TRUE) {
+		GdkPixbuf *node_image;
+		int node_image_width = 0, node_image_height = 0;
+		ETreePath *parent_node;
+
 		node = e_cell_tree_get_node (tree_model, row);
 
 		offset = offset_of_node (tree_model, node);
@@ -174,12 +178,22 @@ ect_draw (ECellView *ecell_view, GdkDrawable *drawable,
 		expanded = e_tree_model_node_is_expanded (tree_model, node);
 		subcell_offset = offset;
 
+		if (expanded)
+			node_image = e_tree_model_node_get_opened_pixbuf (tree_model, node);
+		else
+			node_image = e_tree_model_node_get_closed_pixbuf (tree_model, node);
+
+		if (node_image) {
+			node_image_width = gdk_pixbuf_get_width (node_image);
+			node_image_height = gdk_pixbuf_get_height (node_image);
+		}
+
 		/*
 		 * Be a nice citizen: clip to the region we are supposed to draw on
 		 */
 		rect.x = x1;
 		rect.y = y1;
-		rect.width = offset;
+		rect.width = subcell_offset + node_image_width;
 		rect.height = y2 - y1;
 	
 		gdk_gc_set_clip_rectangle (tree_view->gc, &rect);
@@ -222,41 +236,57 @@ ect_draw (ECellView *ecell_view, GdkDrawable *drawable,
 			/* now traverse back up to the root of the tree, checking at
 			   each level if the node has siblings, and drawing the
 			   correct vertical pipe for it's configuration. */
-			node = e_tree_model_node_get_parent (tree_model, node);
+			parent_node = e_tree_model_node_get_parent (tree_model, node);
 			offset -= INDENT_AMOUNT;
-			while (node && visible_depth_of_node (tree_model, node) != 0) {
-				if (e_tree_model_node_get_next(tree_model, node)) {
+			while (parent_node && visible_depth_of_node (tree_model, parent_node) != 0) {
+				if (e_tree_model_node_get_next(tree_model, parent_node)) {
 					gdk_draw_line (drawable, tree_view->gc,
 						       rect.x + offset - INDENT_AMOUNT / 2,
 						       rect.y,
 						       rect.x + offset - INDENT_AMOUNT / 2,
 						       rect.y + rect.height);
 				}
-				node = e_tree_model_node_get_parent (tree_model, node);
+				parent_node = e_tree_model_node_get_parent (tree_model, parent_node);
 				offset -= INDENT_AMOUNT;
 			}
 		}
 
 		/* now draw our icon if we're expandable */
 		if (expandable) {
-			GdkPixbuf *image = (expanded 
-					    ? E_CELL_TREE(tree_view->cell_view.ecell)->open_pixbuf
-					    : E_CELL_TREE(tree_view->cell_view.ecell)->closed_pixbuf);
-			int width, height;
+			GdkPixbuf *image;
+			int image_width, image_height;
 
-			width = gdk_pixbuf_get_width(image);
-			height = gdk_pixbuf_get_height(image);
+			image = (expanded 
+				 ? E_CELL_TREE(tree_view->cell_view.ecell)->open_pixbuf
+				 : E_CELL_TREE(tree_view->cell_view.ecell)->closed_pixbuf);
+
+			image_width = gdk_pixbuf_get_width(image);
+			image_height = gdk_pixbuf_get_height(image);
 
 			gdk_pixbuf_render_to_drawable_alpha (image,
 							     drawable,
 							     0, 0,
-							     x1 + subcell_offset - INDENT_AMOUNT / 2 - width / 2,
-							     y1 + (y2 - y1) / 2 - height / 2,
-							     width, height,
+							     x1 + subcell_offset - INDENT_AMOUNT / 2 - image_width / 2,
+							     y1 + (y2 - y1) / 2 - image_height / 2,
+							     image_width, image_height,
+							     GDK_PIXBUF_ALPHA_BILEVEL,
+							     128,
+							     GDK_RGB_DITHER_NORMAL,
+							     image_width, 0);
+		}
+
+		if (node_image) {
+			gdk_pixbuf_render_to_drawable_alpha (node_image,
+							     drawable,
+							     0, 0,
+							     x1 + subcell_offset,
+							     y1 + (y2 - y1) / 2 - node_image_height / 2,
+							     node_image_width, node_image_height,
 							     GDK_PIXBUF_ALPHA_BILEVEL,
 							     128,
 							     GDK_RGB_DITHER_NORMAL,
-							     width, 0);
+							     node_image_width, 0);
+			subcell_offset += node_image_width;
 		}
 	}
 
diff --git a/widgets/table/e-tree-example-1.c b/widgets/table/e-tree-example-1.c
index 688bc735b1..c506faebd5 100644
--- a/widgets/table/e-tree-example-1.c
+++ b/widgets/table/e-tree-example-1.c
@@ -20,6 +20,8 @@
 #include "tree-expanded.xpm"
 #include "tree-unexpanded.xpm"
 
+GdkPixbuf *tree_expanded_pixbuf;
+GdkPixbuf *tree_unexpanded_pixbuf;
 
 #define COLS 4
 
@@ -127,7 +129,9 @@ add_sibling (GtkButton *button, gpointer data)
 	parent_node = e_tree_model_node_get_parent (e_tree_model, selected_node);
 
 	e_tree_model_node_insert_before (e_tree_model, parent_node,
-					 selected_node, g_strdup("User added sibling"));
+					 selected_node,
+					 NULL, NULL,
+					 g_strdup("User added sibling"));
 
 }
 
@@ -146,7 +150,8 @@ add_child (GtkButton *button, gpointer data)
 	g_assert (selected_node);
 
 	e_tree_model_node_insert (e_tree_model, selected_node,
-				  0, g_strdup("User added child"));
+				  0, NULL, NULL,
+				  g_strdup("User added child"));
 }
 
 static void
@@ -224,7 +229,6 @@ static void
 create_tree (void)
 {
 	GtkWidget *window, *frame, *button, *vbox;
-	GdkPixbuf *tree_expanded_pixbuf, *tree_unexpanded_pixbuf;
 	ECell *cell_left_just;
 	ECell *cell_tree;
 	ETableHeader *e_table_header;
@@ -241,14 +245,19 @@ create_tree (void)
 
 	/* create a root node with 5 children */
 	root_node = e_tree_model_node_insert (e_tree_model, NULL,
-					      0, g_strdup("Root Node"));
+					      0, NULL, NULL,
+					      g_strdup("Root Node"));
 
 	for (i = 0; i < 5; i++){
 		ETreePath *n = e_tree_model_node_insert (e_tree_model,
-							 root_node, 0, g_strdup("First level of children"));
+							 root_node, 0,
+							 tree_expanded_pixbuf, tree_unexpanded_pixbuf,
+							 g_strdup("First level of children"));
 		for (j = 0; j < 5; j ++) {
 			e_tree_model_node_insert (e_tree_model,
-						  n, 0, g_strdup("Second level of children"));
+						  n, 0,
+						  NULL, NULL,
+						  g_strdup("Second level of children"));
 		}
 	}
 
@@ -273,12 +282,6 @@ create_tree (void)
 	 */
 	cell_left_just = e_cell_text_new (E_TABLE_MODEL(e_tree_model), NULL, GTK_JUSTIFY_LEFT);
 
-	/*
-	 * Create our pixbuf for expanding/unexpanding
-	 */
-	tree_expanded_pixbuf = gdk_pixbuf_new_from_xpm_data((const char**)tree_expanded_xpm);
-	tree_unexpanded_pixbuf = gdk_pixbuf_new_from_xpm_data((const char**)tree_unexpanded_xpm);
-	
 	/* 
 	 * This renderer is used for the tree column (the leftmost one), and
 	 * has as its subcell renderer the text renderer.  this means that
@@ -377,6 +380,12 @@ main (int argc, char *argv [])
 	gtk_widget_push_visual (gdk_rgb_get_visual ());
 	gtk_widget_push_colormap (gdk_rgb_get_cmap ());
 
+	/*
+	 * Create our pixbuf for expanding/unexpanding
+	 */
+	tree_expanded_pixbuf = gdk_pixbuf_new_from_xpm_data((const char**)tree_expanded_xpm);
+	tree_unexpanded_pixbuf = gdk_pixbuf_new_from_xpm_data((const char**)tree_unexpanded_xpm);
+	
 	create_tree ();
 	
 	gtk_main ();
diff --git a/widgets/table/e-tree-model.c b/widgets/table/e-tree-model.c
index 180c63bb96..47b82d3689 100644
--- a/widgets/table/e-tree-model.c
+++ b/widgets/table/e-tree-model.c
@@ -23,6 +23,8 @@ static ETableModel *e_tree_model_parent_class;
 typedef struct {
 	gboolean expanded;
 	guint visible_descendents;
+	GdkPixbuf *opened_pixbuf;
+	GdkPixbuf *closed_pixbuf;
 	gpointer node_data;
 } ENode;
 
@@ -552,10 +554,36 @@ e_tree_model_node_set_data (ETreeModel *etm, ETreePath *node, gpointer node_data
 	enode->node_data = node_data;
 }
 
+GdkPixbuf *
+e_tree_model_node_get_opened_pixbuf (ETreeModel *etm, ETreePath *node)
+{
+	ENode *enode;
+
+	g_return_val_if_fail (node && node->data, NULL);
+
+	enode = (ENode*)node->data;
+
+	return enode->opened_pixbuf;
+}
+
+GdkPixbuf *
+e_tree_model_node_get_closed_pixbuf (ETreeModel *etm, ETreePath *node)
+{
+	ENode *enode;
+
+	g_return_val_if_fail (node && node->data, NULL);
+
+	enode = (ENode*)node->data;
+
+	return enode->closed_pixbuf;
+}
+
 ETreePath*
 e_tree_model_node_insert (ETreeModel *tree_model,
 			  ETreePath *parent_path,
 			  int position,
+			  GdkPixbuf *opened_pixbuf,
+			  GdkPixbuf *closed_pixbuf,
 			  gpointer node_data)
 {
 	ENode *node;
@@ -566,6 +594,8 @@ e_tree_model_node_insert (ETreeModel *tree_model,
 	node = g_new0 (ENode, 1);
 
 	node->expanded = FALSE;
+	node->closed_pixbuf = closed_pixbuf;
+	node->opened_pixbuf = opened_pixbuf;
 	node->node_data = node_data;
 
 	if (parent_path != NULL) {
@@ -608,11 +638,16 @@ e_tree_model_node_insert (ETreeModel *tree_model,
 }
 			  
 ETreePath *
-e_tree_model_node_insert_before (ETreeModel *etree, ETreePath *parent,
-				 ETreePath *sibling, gpointer node_data)
+e_tree_model_node_insert_before (ETreeModel *etree,
+				 ETreePath *parent,
+				 ETreePath *sibling,
+				 GdkPixbuf *opened_pixbuf,
+				 GdkPixbuf *closed_pixbuf,
+				 gpointer node_data)
 {
 	return e_tree_model_node_insert (etree, parent,
 					 g_node_child_position (parent, sibling),
+					 opened_pixbuf, closed_pixbuf,
 					 node_data);
 }
 
diff --git a/widgets/table/e-tree-model.h b/widgets/table/e-tree-model.h
index 45351b8f6c..0a7ecdb7ed 100644
--- a/widgets/table/e-tree-model.h
+++ b/widgets/table/e-tree-model.h
@@ -3,6 +3,7 @@
 #define _E_TREE_MODEL_H_
 
 #include "e-table-model.h"
+#include "gdk-pixbuf/gdk-pixbuf.h"
 
 #define E_TREE_MODEL_TYPE        (e_tree_model_get_type ())
 #define E_TREE_MODEL(o)          (GTK_CHECK_CAST ((o), E_TREE_MODEL_TYPE, ETreeModel))
@@ -68,8 +69,8 @@ ETreePath *e_tree_model_node_get_next   (ETreeModel *etree, ETreePath *path);
 ETreePath *e_tree_model_node_get_prev   (ETreeModel *etree, ETreePath *path);
 
 /* node operations */
-ETreePath *e_tree_model_node_insert        (ETreeModel *etree, ETreePath *parent, int position, gpointer node_data);
-ETreePath *e_tree_model_node_insert_before (ETreeModel *etree, ETreePath *parent, ETreePath *sibling, gpointer node_data);
+ETreePath *e_tree_model_node_insert        (ETreeModel *etree, ETreePath *parent, int position, GdkPixbuf *opened_pixbuf, GdkPixbuf *closed_pixbuf, gpointer node_data);
+ETreePath *e_tree_model_node_insert_before (ETreeModel *etree, ETreePath *parent, ETreePath *sibling, GdkPixbuf *opened_pixbuf, GdkPixbuf *closed_pixbuf, gpointer node_data);
 gpointer   e_tree_model_node_remove        (ETreeModel *etree, ETreePath *path);
 
 /* node accessors */
@@ -84,6 +85,8 @@ guint    e_tree_model_node_depth                   (ETreeModel *etree, ETreePath
 guint    e_tree_model_node_num_visible_descendents (ETreeModel *etm, ETreePath *node);
 gpointer e_tree_model_node_get_data                (ETreeModel *etm, ETreePath *node);
 void     e_tree_model_node_set_data                (ETreeModel *etm, ETreePath *node, gpointer node_data);
+GdkPixbuf *e_tree_model_node_get_opened_pixbuf     (ETreeModel *etm, ETreePath *node);
+GdkPixbuf *e_tree_model_node_get_closed_pixbuf     (ETreeModel *etm, ETreePath *node);
 
 /* display oriented routines */
 ETreePath *e_tree_model_node_at_row           (ETreeModel *etree, int row);