gtk/gdk/win32/gdkdevice-virtual.c
Matthias Clasen c860492359 Clean up handling of _gdk_win32_grab_cursor
This is a variable holding a ref to an object, so it is
a great case to use g_set_object and g_clear_object.

 # Please enter the commit message for your changes. Lines starting
2015-10-17 12:45:25 -04:00

408 lines
12 KiB
C

/* GDK - The GIMP Drawing Kit
* Copyright (C) 2009 Carlos Garnacho <carlosg@gnome.org>
*
* 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 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/>.
*/
#include "config.h"
#include <gdk/gdkwindow.h>
#include <windowsx.h>
#include <objbase.h>
#include "gdkdisplayprivate.h"
#include "gdkdevice-virtual.h"
#include "gdkwin32.h"
static gboolean gdk_device_virtual_get_history (GdkDevice *device,
GdkWindow *window,
guint32 start,
guint32 stop,
GdkTimeCoord ***events,
gint *n_events);
static void gdk_device_virtual_get_state (GdkDevice *device,
GdkWindow *window,
gdouble *axes,
GdkModifierType *mask);
static void gdk_device_virtual_set_window_cursor (GdkDevice *device,
GdkWindow *window,
GdkCursor *cursor);
static void gdk_device_virtual_warp (GdkDevice *device,
GdkScreen *screen,
gdouble x,
gdouble y);
static void gdk_device_virtual_query_state (GdkDevice *device,
GdkWindow *window,
GdkWindow **root_window,
GdkWindow **child_window,
gdouble *root_x,
gdouble *root_y,
gdouble *win_x,
gdouble *win_y,
GdkModifierType *mask);
static GdkGrabStatus gdk_device_virtual_grab (GdkDevice *device,
GdkWindow *window,
gboolean owner_events,
GdkEventMask event_mask,
GdkWindow *confine_to,
GdkCursor *cursor,
guint32 time_);
static void gdk_device_virtual_ungrab (GdkDevice *device,
guint32 time_);
static GdkWindow * gdk_device_virtual_window_at_position (GdkDevice *device,
gdouble *win_x,
gdouble *win_y,
GdkModifierType *mask,
gboolean get_toplevel);
static void gdk_device_virtual_select_window_events (GdkDevice *device,
GdkWindow *window,
GdkEventMask event_mask);
G_DEFINE_TYPE (GdkDeviceVirtual, gdk_device_virtual, GDK_TYPE_DEVICE)
static void
gdk_device_virtual_class_init (GdkDeviceVirtualClass *klass)
{
GdkDeviceClass *device_class = GDK_DEVICE_CLASS (klass);
device_class->get_history = gdk_device_virtual_get_history;
device_class->get_state = gdk_device_virtual_get_state;
device_class->set_window_cursor = gdk_device_virtual_set_window_cursor;
device_class->warp = gdk_device_virtual_warp;
device_class->query_state = gdk_device_virtual_query_state;
device_class->grab = gdk_device_virtual_grab;
device_class->ungrab = gdk_device_virtual_ungrab;
device_class->window_at_position = gdk_device_virtual_window_at_position;
device_class->select_window_events = gdk_device_virtual_select_window_events;
}
static void
gdk_device_virtual_init (GdkDeviceVirtual *device_virtual)
{
}
void
_gdk_device_virtual_set_active (GdkDevice *device,
GdkDevice *new_active)
{
GdkDeviceVirtual *virtual = GDK_DEVICE_VIRTUAL (device);
int n_axes, i;
GdkAtom label_atom;
GdkAxisUse use;
gdouble min_value, max_value, resolution;
if (virtual->active_device == new_active)
return;
virtual->active_device = new_active;
if (gdk_device_get_source (device) != GDK_SOURCE_KEYBOARD)
{
_gdk_device_reset_axes (device);
n_axes = gdk_device_get_n_axes (new_active);
for (i = 0; i < n_axes; i++)
{
_gdk_device_get_axis_info (new_active, i,
&label_atom, &use,
&min_value, &max_value, &resolution);
_gdk_device_add_axis (device,
label_atom, use,
min_value, max_value, resolution);
}
}
g_signal_emit_by_name (G_OBJECT (device), "changed");
}
static gboolean
gdk_device_virtual_get_history (GdkDevice *device,
GdkWindow *window,
guint32 start,
guint32 stop,
GdkTimeCoord ***events,
gint *n_events)
{
/* History is only per slave device */
return FALSE;
}
static void
gdk_device_virtual_get_state (GdkDevice *device,
GdkWindow *window,
gdouble *axes,
GdkModifierType *mask)
{
GdkDeviceVirtual *virtual = GDK_DEVICE_VIRTUAL (device);
GdkDevice *active = virtual->active_device;
GDK_DEVICE_GET_CLASS (active)->get_state (active,
window, axes, mask);
}
static void
gdk_device_virtual_set_window_cursor (GdkDevice *device,
GdkWindow *window,
GdkCursor *cursor)
{
GdkWindow *parent_window;
GdkWindowImplWin32 *impl;
GdkCursor *replacement_cursor;
GdkCursor *previous_cursor;
impl = GDK_WINDOW_IMPL_WIN32 (window->impl);
previous_cursor = impl->cursor;
if (cursor != NULL && GDK_WIN32_CURSOR (cursor)->hcursor != NULL)
{
/* If the pointer is over our window, set new cursor */
GdkWindow *curr_window = gdk_window_get_device_position (window, device, NULL, NULL, NULL);
if (curr_window == window ||
(curr_window && window == gdk_window_get_toplevel (curr_window)))
SetCursor (GDK_WIN32_CURSOR (cursor)->hcursor);
else
{
/* Climb up the tree and find whether our window is the
* first ancestor that has cursor defined, and if so, set
* new cursor.
*/
while (curr_window && curr_window->impl &&
!GDK_WINDOW_IMPL_WIN32 (curr_window->impl)->cursor)
{
curr_window = curr_window->parent;
if (curr_window == GDK_WINDOW (window))
{
SetCursor (GDK_WIN32_CURSOR (cursor)->hcursor);
break;
}
}
}
}
/* Unset the previous cursor: Need to make sure it's no longer in
* use before we destroy it, in case we're not over our window but
* the cursor is still set to our old one.
*/
if (previous_cursor != NULL &&
GetCursor () == GDK_WIN32_CURSOR (previous_cursor)->hcursor)
{
/* Look for a suitable cursor to use instead */
replacement_cursor = NULL;
parent_window = GDK_WINDOW (window)->parent;
while (replacement_cursor == NULL)
{
if (parent_window)
{
impl = GDK_WINDOW_IMPL_WIN32 (parent_window->impl);
replacement_cursor = impl->cursor;
parent_window = parent_window->parent;
}
else
replacement_cursor = _gdk_win32_display_get_cursor_for_type (_gdk_display, GDK_LEFT_PTR);
}
SetCursor (GDK_WIN32_CURSOR (replacement_cursor)->hcursor);
}
}
static void
gdk_device_virtual_warp (GdkDevice *device,
GdkScreen *screen,
gdouble x,
gdouble y)
{
SetCursorPos (x - _gdk_offset_x, y - _gdk_offset_y);
}
static void
gdk_device_virtual_query_state (GdkDevice *device,
GdkWindow *window,
GdkWindow **root_window,
GdkWindow **child_window,
gdouble *root_x,
gdouble *root_y,
gdouble *win_x,
gdouble *win_y,
GdkModifierType *mask)
{
GdkDeviceVirtual *virtual = GDK_DEVICE_VIRTUAL (device);
_gdk_device_query_state (virtual->active_device,
window, root_window, child_window,
root_x, root_y,
win_x, win_y,
mask);
}
static GdkGrabStatus
gdk_device_virtual_grab (GdkDevice *device,
GdkWindow *window,
gboolean owner_events,
GdkEventMask event_mask,
GdkWindow *confine_to,
GdkCursor *cursor,
guint32 time_)
{
GdkWindowImplWin32 *impl = GDK_WINDOW_IMPL_WIN32 (window->impl);
if (gdk_device_get_source (device) != GDK_SOURCE_KEYBOARD)
{
if (_gdk_win32_grab_cursor != NULL)
{
if (GetCursor () == GDK_WIN32_CURSOR (_gdk_win32_grab_cursor)->hcursor)
SetCursor (NULL);
}
g_set_object (&_gdk_win32_grab_cursor, cursor);
if (_gdk_win32_grab_cursor != NULL)
SetCursor (GDK_WIN32_CURSOR (_gdk_win32_grab_cursor)->hcursor);
else if (impl->cursor != NULL)
SetCursor (GDK_WIN32_CURSOR (impl->cursor)->hcursor);
else
SetCursor (LoadCursor (NULL, IDC_ARROW));
SetCapture (GDK_WINDOW_HWND (window));
}
return GDK_GRAB_SUCCESS;
}
static void
gdk_device_virtual_ungrab (GdkDevice *device,
guint32 time_)
{
GdkDeviceGrabInfo *info;
GdkDisplay *display;
display = gdk_device_get_display (device);
info = _gdk_display_get_last_device_grab (display, device);
if (info)
info->serial_end = 0;
if (gdk_device_get_source (device) != GDK_SOURCE_KEYBOARD)
{
if (_gdk_win32_grab_cursor != NULL)
{
if (GetCursor () == GDK_WIN32_CURSOR (_gdk_win32_grab_cursor)->hcursor)
SetCursor (NULL);
}
g_clear_object (&_gdk_win32_grab_cursor);
ReleaseCapture ();
}
_gdk_display_device_grab_update (display, device, device, 0);
}
static void
screen_to_client (HWND hwnd, POINT screen_pt, POINT *client_pt)
{
*client_pt = screen_pt;
ScreenToClient (hwnd, client_pt);
}
static GdkWindow *
gdk_device_virtual_window_at_position (GdkDevice *device,
gdouble *win_x,
gdouble *win_y,
GdkModifierType *mask,
gboolean get_toplevel)
{
GdkWindow *window = NULL;
POINT screen_pt, client_pt;
HWND hwnd, hwndc;
RECT rect;
GetCursorPos (&screen_pt);
if (get_toplevel)
{
/* Only consider visible children of the desktop to avoid the various
* non-visible windows you often find on a running Windows box. These
* might overlap our windows and cause our walk to fail. As we assume
* WindowFromPoint() can find our windows, we follow similar logic
* here, and ignore invisible and disabled windows.
*/
hwnd = GetDesktopWindow ();
do {
window = gdk_win32_handle_table_lookup (hwnd);
if (window != NULL &&
GDK_WINDOW_TYPE (window) != GDK_WINDOW_ROOT &&
GDK_WINDOW_TYPE (window) != GDK_WINDOW_FOREIGN)
break;
screen_to_client (hwnd, screen_pt, &client_pt);
hwndc = ChildWindowFromPointEx (hwnd, client_pt, CWP_SKIPDISABLED |
CWP_SKIPINVISIBLE);
/* Verify that we're really inside the client area of the window */
if (hwndc != hwnd)
{
GetClientRect (hwndc, &rect);
screen_to_client (hwndc, screen_pt, &client_pt);
if (!PtInRect (&rect, client_pt))
hwndc = hwnd;
}
} while (hwndc != hwnd && (hwnd = hwndc, 1));
}
else
{
hwnd = WindowFromPoint (screen_pt);
/* Verify that we're really inside the client area of the window */
GetClientRect (hwnd, &rect);
screen_to_client (hwnd, screen_pt, &client_pt);
if (!PtInRect (&rect, client_pt))
hwnd = NULL;
/* If we didn't hit any window at that point, return the desktop */
if (hwnd == NULL)
{
if (win_x)
*win_x = screen_pt.x + _gdk_offset_x;
if (win_y)
*win_y = screen_pt.y + _gdk_offset_y;
return _gdk_root;
}
window = gdk_win32_handle_table_lookup (hwnd);
}
if (window && (win_x || win_y))
{
if (win_x)
*win_x = client_pt.x;
if (win_y)
*win_y = client_pt.y;
}
return window;
}
static void
gdk_device_virtual_select_window_events (GdkDevice *device,
GdkWindow *window,
GdkEventMask event_mask)
{
}