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API: Add gtk_drag_set_icon_surface()

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The function is supposed to replace gtk_drag_set_icon_pixmap().
This commit is contained in:
Benjamin Otte 2010-08-15 16:52:25 +02:00
parent 0d9d599b50
commit 3dfb47bc3c
4 changed files with 139 additions and 10 deletions
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1
docs/reference/gtk/gtk3-sections.txt
View File

@ -5441,6 +5441,7 @@ gtk_drag_set_icon_widget
gtk_drag_set_icon_pixmap
gtk_drag_set_icon_pixbuf
gtk_drag_set_icon_stock
gtk_drag_set_icon_surface
gtk_drag_set_icon_name
gtk_drag_set_icon_default
gtk_drag_check_threshold

1
gtk/gtk.symbols
View File

@ -949,6 +949,7 @@ gtk_drag_set_icon_name
gtk_drag_set_icon_pixbuf
gtk_drag_set_icon_pixmap
gtk_drag_set_icon_stock
gtk_drag_set_icon_surface
gtk_drag_set_icon_widget
gtk_drag_source_add_image_targets
gtk_drag_source_add_text_targets

125
gtk/gtkdnd.c
View File

@ -26,6 +26,7 @@
#include "config.h"
#include <math.h>
#include <stdlib.h>
#include <string.h>
@ -3351,6 +3352,130 @@ gtk_drag_set_icon_pixmap (GdkDragContext *context,
gtk_drag_set_icon_window (context, window, hot_x, hot_y, TRUE);
}
/* XXX: This function is in gdk, too. Should it be in Cairo? */
static gboolean
_gtk_cairo_surface_extents (cairo_surface_t *surface,
GdkRectangle *extents)
{
double x1, x2, y1, y2;
cairo_t *cr;
g_return_val_if_fail (surface != NULL, FALSE);
g_return_val_if_fail (extents != NULL, FALSE);
cr = cairo_create (surface);
cairo_clip_extents (cr, &x1, &y1, &x2, &y2);
x1 = floor (x1);
y1 = floor (y1);
x2 = ceil (x2);
y2 = ceil (y2);
x2 -= x1;
y2 -= y1;
if (x1 < G_MININT || x1 > G_MAXINT ||
y1 < G_MININT || y1 > G_MAXINT ||
x2 > G_MAXINT || y2 > G_MAXINT)
{
extents->x = extents->y = extents->width = extents->height = 0;
return FALSE;
}
extents->x = x1;
extents->y = y1;
extents->width = x2;
extents->height = y2;
return TRUE;
}
/**
* gtk_drag_set_icon_surface:
* @context: the context for a drag. (This must be called
* with a context for the source side of a drag)
* @surface: the surface to use as icon
*
* Sets @surface as the icon for a given drag. GTK+ retains
* references for the arguments, and will release them when
* they are no longer needed.
**/
void
gtk_drag_set_icon_surface (GdkDragContext *context,
cairo_surface_t *surface)
{
GtkWidget *window;
GdkScreen *screen;
GdkRectangle extents;
cairo_pattern_t *pattern;
g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
g_return_if_fail (context->is_source);
g_return_if_fail (surface != NULL);
_gtk_cairo_surface_extents (surface, &extents);
screen = gdk_drawable_get_screen (context->source_window);
/* Push a NULL colormap to guard against gtk_widget_push_colormap() */
gtk_widget_push_colormap (NULL);
window = gtk_window_new (GTK_WINDOW_POPUP);
gtk_window_set_type_hint (GTK_WINDOW (window), GDK_WINDOW_TYPE_HINT_DND);
gtk_window_set_screen (GTK_WINDOW (window), screen);
set_can_change_screen (window, TRUE);
gtk_widget_pop_colormap ();
gtk_widget_set_events (window, GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK);
gtk_widget_set_app_paintable (window, TRUE);
gtk_widget_set_size_request (window, extents.width, extents.height);
gtk_widget_realize (window);
if (cairo_surface_get_content (surface) != CAIRO_CONTENT_COLOR)
{
cairo_surface_t *saturated;
cairo_region_t *region;
cairo_t *cr;
region = gdk_cairo_region_create_from_surface (surface);
gtk_widget_shape_combine_region (window, region);
cairo_region_destroy (region);
/* Need to saturate the colors, so it doesn't look like semi-transparent
* pixels were painted on black. */
saturated = gdk_window_create_similar_surface (gtk_widget_get_window (window),
CAIRO_CONTENT_COLOR,
extents.width,
extents.height);
cr = cairo_create (saturated);
cairo_push_group_with_content (cr, CAIRO_CONTENT_COLOR_ALPHA);
cairo_set_source_surface (cr, surface, extents.x, extents.y);
cairo_paint (cr);
cairo_set_operator (cr, CAIRO_OPERATOR_SATURATE);
cairo_paint (cr);
cairo_pop_group_to_source (cr);
cairo_paint (cr);
cairo_destroy (cr);
pattern = cairo_pattern_create_for_surface (saturated);
cairo_surface_destroy (saturated);
}
else
{
cairo_matrix_t matrix;
pattern = cairo_pattern_create_for_surface (surface);
cairo_matrix_init_translate (&matrix, extents.x, extents.y);
cairo_pattern_set_matrix (pattern, &matrix);
}
gdk_window_set_background_pattern (gtk_widget_get_window (window), pattern);
gtk_drag_set_icon_window (context, window, extents.x, extents.y, TRUE);
}
/**
* gtk_drag_set_icon_name:
* @context: the context for a drag. (This must be called

22
gtk/gtkdnd.h
View File

@ -115,16 +115,16 @@ void gtk_drag_source_add_text_targets (GtkWidget *widget);
void gtk_drag_source_add_image_targets (GtkWidget *widget);
void gtk_drag_source_add_uri_targets (GtkWidget *widget);
void gtk_drag_source_set_icon (GtkWidget *widget,
GdkColormap *colormap,
GdkPixmap *pixmap,
GdkBitmap *mask);
void gtk_drag_source_set_icon_pixbuf (GtkWidget *widget,
GdkPixbuf *pixbuf);
void gtk_drag_source_set_icon_stock (GtkWidget *widget,
const gchar *stock_id);
void gtk_drag_source_set_icon_name (GtkWidget *widget,
const gchar *icon_name);
void gtk_drag_source_set_icon (GtkWidget *widget,
GdkColormap *colormap,
GdkPixmap *pixmap,
GdkBitmap *mask);
void gtk_drag_source_set_icon_pixbuf (GtkWidget *widget,
GdkPixbuf *pixbuf);
void gtk_drag_source_set_icon_stock (GtkWidget *widget,
const gchar *stock_id);
void gtk_drag_source_set_icon_name (GtkWidget *widget,
const gchar *icon_name);
/* There probably should be functions for setting the targets
* as a GtkTargetList
@ -156,6 +156,8 @@ void gtk_drag_set_icon_stock (GdkDragContext *context,
const gchar *stock_id,
gint hot_x,
gint hot_y);
void gtk_drag_set_icon_surface(GdkDragContext *context,
cairo_surface_t *surface);
void gtk_drag_set_icon_name (GdkDragContext *context,
const gchar *icon_name,
gint hot_x,