From: Marijn van Vliet <marijn.vanvliet@med.kuleuven.be>
Date: Fri, 29 Jan 2010 14:05:57 +0000 (+0000)
Subject: Added correct resize handling
X-Git-Url: https://git.stderr.nl/gitweb?p=rodin%2Fchimara.git;a=commitdiff_plain;h=9e4d74d44d12f977c573c31cab7bcb3819a27976

Added correct resize handling


git-svn-id: http://lassie.dyndns-server.com/svn/gargoyle-gtk@217 ddfedd41-794f-dd11-ae45-00112f111e67
---

diff --git a/libchimara/graphics.c b/libchimara/graphics.c
index 48b3a12..f94b90c 100644
--- a/libchimara/graphics.c
+++ b/libchimara/graphics.c
@@ -62,7 +62,7 @@ glk_image_get_info(glui32 image, glui32 *width, glui32 *height)
 
 	/* Determine the image dimensions */
 	if(!size_determined) {
-		WARNING("Cannot read image size: file data trimmed?");
+		WARNING("Cannot read image size");
 		g_free(info);
 		return FALSE;
 	}
@@ -73,8 +73,6 @@ glk_image_get_info(glui32 image, glui32 *width, glui32 *height)
 		*height =info->height;
 	g_free(info);
 
-	//printf("size loaded: %d x %d\n", (int) *width, (int) *height);
-
 	return TRUE;
 }
 
@@ -86,10 +84,40 @@ on_size_prepared(GdkPixbufLoader *loader, gint width, gint height, struct image_
 	size_determined = TRUE;
 }
 
+/*** Called when the graphics window is resized. Resize the backing pixmap if necessary ***/
 void
-on_graphics_size_allocate(GtkWidget *widget, GtkAllocation *allocation, winid_t *win)
+on_graphics_size_allocate(GtkWidget *widget, GtkAllocation *allocation, winid_t win)
 {
-	printf("size allocated: %dx%d\n", allocation->width, allocation->height);
+	printf("allocate to: %dx%d\n", allocation->width, allocation->height);
+	GdkPixmap *oldmap;
+	gtk_image_get_pixmap( GTK_IMAGE(widget), &oldmap, NULL );
+	gint oldwidth = 0;
+	gint oldheight = 0;
+ 
+	/* Determine whether a pixmap exists with the correct size */
+	gboolean needs_resize = FALSE;
+	if(oldmap == NULL)
+		needs_resize = TRUE;
+	else {
+		gdk_drawable_get_size( GDK_DRAWABLE(oldmap), &oldwidth, &oldheight );
+		if(oldwidth != allocation->width || oldheight != allocation->height)
+			needs_resize = TRUE;
+	}
+
+	if(needs_resize) {
+		printf("needs resize\n");
+		/* Create a new pixmap */
+		GdkPixmap *newmap = gdk_pixmap_new(widget->window, allocation->width, allocation->height, -1);
+		gdk_draw_rectangle( GDK_DRAWABLE(newmap), widget->style->white_gc, TRUE, 0, 0, allocation->width, allocation->height);
+
+		/* Copy the contents of the old pixmap */
+		if(oldmap != NULL)
+			gdk_draw_drawable( GDK_DRAWABLE(newmap), widget->style->white_gc, GDK_DRAWABLE(oldmap), 0, 0, 0, 0, oldwidth, oldheight);
+		
+		/* Use the new pixmap */
+		gtk_image_set_from_pixmap( GTK_IMAGE(widget), newmap, NULL );
+		g_object_unref(newmap);
+	}
 }
 
 glui32
@@ -107,8 +135,6 @@ glk_image_draw(winid_t win, glui32 image, glsi32 val1, glsi32 val2) {
 	guchar *buffer;
 	GdkPixmap *canvas;
 
-	//printf("glk_image_get_info(%d)\n", image);
-
 	/* Lookup the proper resource */
 	blorb_error = giblorb_load_resource(glk_data->resource_map, giblorb_method_FilePos, &res, giblorb_ID_Pict, image);
 	if(blorb_error != giblorb_err_None) {
@@ -135,6 +161,7 @@ glk_image_draw(winid_t win, glui32 image, glsi32 val1, glsi32 val2) {
 
 		total_read += num_read;
 	}
+	printf("Loading done\n");
 	giblorb_unload_chunk(glk_data->resource_map, image);
 	g_free(buffer);
 
@@ -152,11 +179,13 @@ glk_image_draw(winid_t win, glui32 image, glsi32 val1, glsi32 val2) {
 		return FALSE;
 	}
 
+	// TODO: FIX hang?
 	gdk_draw_pixbuf( GDK_DRAWABLE(canvas), NULL, pixbuf, 0, 0, val1, val2, -1, -1, GDK_RGB_DITHER_NONE, 0, 0 );
 	gdk_pixbuf_loader_close(loader, &pixbuf_error);
 
 	/* Update the screen */
 	gtk_widget_queue_draw(win->widget);
+
 	return TRUE;
 }
 
diff --git a/libchimara/graphics.h b/libchimara/graphics.h
index cf81d59..34cde77 100644
--- a/libchimara/graphics.h
+++ b/libchimara/graphics.h
@@ -14,6 +14,6 @@ struct image_info {
 	gint width, height;
 };
 
-void on_graphics_size_allocate(GtkWidget *widget, GtkAllocation *allocation, winid_t *win);
+void on_graphics_size_allocate(GtkWidget *widget, GtkAllocation *allocation, winid_t win);
 
 #endif
diff --git a/libchimara/window.c b/libchimara/window.c
index 209cda6..02f1e5c 100644
--- a/libchimara/window.c
+++ b/libchimara/window.c
@@ -561,16 +561,13 @@ glk_window_open(winid_t split, glui32 method, glui32 size, glui32 wintype,
 
 		case wintype_Graphics:
 		{
-			// TODO: Find real size
-			GdkPixmap *newmap = gdk_pixmap_new(NULL, 800, 600, 24);
-		    GtkWidget *image = gtk_image_new_from_pixmap(newmap, NULL);
-			g_object_unref(newmap);
-
+		    GtkWidget *image = gtk_image_new_from_pixmap(NULL, NULL);
 			gtk_widget_show(image);
 
+			win->unit_width = 1;
+			win->unit_height = 1;
 		    win->widget = image;
 		    win->frame = image;
-
 		    		
 			/* Connect signal handlers */
 			win->button_press_event_handler = g_signal_connect(image, "button-press-event", G_CALLBACK(on_window_button_press), win);