Learning_GTK4_tree/gdk/macos/gdkmacosdragsurface.c

136 lines
4.0 KiB
C

/*
* Copyright © 2020 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "config.h"
#include "gdkdragsurfaceprivate.h"
#include "gdkmacosdragsurface-private.h"
#include "gdkmacosdisplay-private.h"
#include "gdkmacosutils-private.h"
#include "gdk/gdkframeclockidleprivate.h"
struct _GdkMacosDragSurface
{
GdkMacosSurface parent_instance;
};
struct _GdkMacosDragSurfaceClass
{
GdkMacosSurfaceClass parent_instance;
};
static gboolean
_gdk_macos_drag_surface_present (GdkDragSurface *surface,
int width,
int height)
{
g_assert (GDK_IS_MACOS_SURFACE (surface));
_gdk_macos_surface_move_resize (GDK_MACOS_SURFACE (surface),
-1, -1,
width, height);
if (!GDK_SURFACE_IS_MAPPED (GDK_SURFACE (surface)))
_gdk_macos_surface_show (GDK_MACOS_SURFACE (surface));
return GDK_SURFACE_IS_MAPPED (GDK_SURFACE (surface));
}
static void
drag_surface_iface_init (GdkDragSurfaceInterface *iface)
{
iface->present = _gdk_macos_drag_surface_present;
}
G_DEFINE_TYPE_WITH_CODE (GdkMacosDragSurface, _gdk_macos_drag_surface, GDK_TYPE_MACOS_SURFACE,
G_IMPLEMENT_INTERFACE (GDK_TYPE_DRAG_SURFACE, drag_surface_iface_init))
static void
_gdk_macos_drag_surface_constructed (GObject *object)
{
GDK_BEGIN_MACOS_ALLOC_POOL;
GdkMacosWindow *window;
GdkMacosSurface *self = GDK_MACOS_SURFACE (object);
GdkSurface *surface = GDK_SURFACE (self);
GdkMacosDisplay *display = GDK_MACOS_DISPLAY (gdk_surface_get_display (GDK_SURFACE (self)));
GdkFrameClock *frame_clock;
NSScreen *screen;
NSUInteger style_mask;
NSRect content_rect;
NSRect screen_rect;
int nx;
int ny;
style_mask = NSWindowStyleMaskBorderless;
_gdk_macos_display_to_display_coords (display, 0, 0, &nx, &ny);
screen = _gdk_macos_display_get_screen_at_display_coords (display, nx, ny);
screen_rect = [screen frame];
nx -= screen_rect.origin.x;
ny -= screen_rect.origin.y;
content_rect = NSMakeRect (nx, ny - 1, 1, 1);
window = [[GdkMacosWindow alloc] initWithContentRect:content_rect
styleMask:style_mask
backing:NSBackingStoreBuffered
defer:NO
screen:screen];
[window setOpaque:NO];
[window setBackgroundColor:[NSColor clearColor]];
[window setDecorated:NO];
_gdk_macos_surface_set_native (self, window);
frame_clock = _gdk_frame_clock_idle_new ();
gdk_surface_set_frame_clock (surface, frame_clock);
g_object_unref (frame_clock);
GDK_END_MACOS_ALLOC_POOL;
G_OBJECT_CLASS (_gdk_macos_drag_surface_parent_class)->constructed (object);
}
static void
_gdk_macos_drag_surface_class_init (GdkMacosDragSurfaceClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->constructed = _gdk_macos_drag_surface_constructed;
}
static void
_gdk_macos_drag_surface_init (GdkMacosDragSurface *self)
{
}
GdkMacosSurface *
_gdk_macos_drag_surface_new (GdkMacosDisplay *display)
{
g_return_val_if_fail (GDK_IS_MACOS_DISPLAY (display), NULL);
return g_object_new (GDK_TYPE_MACOS_DRAG_SURFACE,
"display", display,
NULL);
}