[gimp/gtk3-port: 65/233] modules: port to GtkWidget::draw()

[Michael Natterer <mitch src gnome org>]

commit c1f84a13394890f68a041329142aadcaed64cbf2
Author: Michael Natterer <mitch gimp org>
Date:   Thu Oct 21 12:49:13 2010 +0200

    modules: port to GtkWidget::draw()

 modules/color-selector-water.c |   49 +++++++++++++++++++--------------------
 1 files changed, 24 insertions(+), 25 deletions(-)
---
diff --git a/modules/color-selector-water.c b/modules/color-selector-water.c
index 2c7efbe..ad39e8d 100644
--- a/modules/color-selector-water.c
+++ b/modules/color-selector-water.c
@@ -74,9 +74,8 @@ static void       colorsel_water_set_config        (GimpColorSelector *selector,
 static void       colorsel_water_create_transform  (ColorselWater     *water);
 static void       colorsel_water_destroy_transform (ColorselWater     *water);
 
-static gboolean   select_area_expose               (GtkWidget         *widget,
-                                                    GdkEventExpose    *event,
-                                                    ColorselWater     *water);
+static gboolean   select_area_draw                 (GtkWidget         *widget,
+                                                    cairo_t           *cr);
 static gboolean   button_press_event               (GtkWidget         *widget,
                                                     GdkEventButton    *event,
                                                     ColorselWater     *water);
@@ -159,8 +158,8 @@ colorsel_water_init (ColorselWater *water)
 
   water->area = gtk_drawing_area_new ();
   gtk_container_add (GTK_CONTAINER (frame), water->area);
-  g_signal_connect (water->area, "expose-event",
-                    G_CALLBACK (select_area_expose),
+  g_signal_connect (water->area, "draw",
+                    G_CALLBACK (select_area_draw),
                     water);
 
   /* Event signals */
@@ -290,12 +289,13 @@ colorsel_water_destroy_transform (ColorselWater *water)
 }
 
 static gboolean
-select_area_expose (GtkWidget      *widget,
-                    GdkEventExpose *event,
-                    ColorselWater  *water)
+select_area_draw (GtkWidget *widget,
+                  cairo_t   *cr)
 {
-  cairo_t         *cr;
+  ColorselWater   *water = COLORSEL_WATER (widget);
+  GdkRectangle     area;
   GtkAllocation    allocation;
+  gdouble          x1, y1, x2, y2;
   gdouble          dx;
   gdouble          dy;
   cairo_surface_t *surface;
@@ -303,10 +303,12 @@ select_area_expose (GtkWidget      *widget,
   gdouble          y;
   gint             j;
 
-  cr = gdk_cairo_create (event->window);
+  cairo_clip_extents (cr, &x1, &y1, &x2, &y2);
 
-  gdk_cairo_region (cr, event->region);
-  cairo_clip (cr);
+  area.x      = floor (x1);
+  area.y      = floor (y1);
+  area.width  = ceil (x2) - area.x;
+  area.height = ceil (y2) - area.y;
 
   gtk_widget_get_allocation (widget, &allocation);
 
@@ -314,16 +316,16 @@ select_area_expose (GtkWidget      *widget,
   dy = 1.0 / allocation.height;
 
   surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24,
-                                        event->area.width,
-                                        event->area.height);
+                                        area.width,
+                                        area.height);
 
   dest = cairo_image_surface_get_data (surface);
 
   if (! water->transform)
     colorsel_water_create_transform (water);
 
-  for (j = 0, y = event->area.y / allocation.height;
-       j < event->area.height;
+  for (j = 0, y = area.y / allocation.height;
+       j < area.height;
        j++, y += dy)
     {
       guchar  *d  = dest;
@@ -338,11 +340,11 @@ select_area_expose (GtkWidget      *widget,
 
       gint     i;
 
-      r += event->area.x * dr;
-      g += event->area.x * dg;
-      b += event->area.x * db;
+      r += area.x * dr;
+      g += area.x * dg;
+      b += area.x * db;
 
-      for (i = 0; i < event->area.width ; i++)
+      for (i = 0; i < area.width; i++)
         {
           GIMP_CAIRO_RGB24_SET_PIXEL (d,
                                       CLAMP ((gint) r, 0, 255),
@@ -362,20 +364,17 @@ select_area_expose (GtkWidget      *widget,
                                              dest,
                                              babl_format ("cairo-RGB24"),
                                              dest,
-                                             event->area.width);
+                                             area.width);
 
       dest += cairo_image_surface_get_stride (surface);
     }
 
   cairo_surface_mark_dirty (surface);
-  cairo_set_source_surface (cr, surface,
-                            event->area.x, event->area.y);
+  cairo_set_source_surface (cr, surface, area.x, area.y);
   cairo_surface_destroy (surface);
 
   cairo_paint (cr);
 
-  cairo_destroy (cr);
-
   return FALSE;
 }