mirror of
https://gitlab.gnome.org/GNOME/gtk.git
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641fbd86d7
In particular this means that cursors are disposed of by the way of g_object_unref(), not DestroyCursor (which is documented to not to be used on certain kinds of cursors, and we can't tell which is which). It should also alleviate any concerns about destroying cursors that are still in use by other windows, except for cases where we would somehow get our hands on a HCURSOR that someone else is using and we make a GdkCursor out of it and later unref and finalize it while it is still in use. It also removes the need to call CopyCursor(), which makes animated cursors into non-animated ones as a side-effect (supposed to be a bug, but try explaining that to MS). Now cursors should be animated (if the are set up as such in the OS). https://bugzilla.gnome.org/show_bug.cgi?id=697477
410 lines
12 KiB
C
410 lines
12 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 2009 Carlos Garnacho <carlosg@gnome.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gdk/gdkwindow.h>
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#include <windowsx.h>
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#include <objbase.h>
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#include "gdkdisplayprivate.h"
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#include "gdkdevice-virtual.h"
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#include "gdkwin32.h"
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static gboolean gdk_device_virtual_get_history (GdkDevice *device,
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GdkWindow *window,
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guint32 start,
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guint32 stop,
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GdkTimeCoord ***events,
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gint *n_events);
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static void gdk_device_virtual_get_state (GdkDevice *device,
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GdkWindow *window,
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gdouble *axes,
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GdkModifierType *mask);
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static void gdk_device_virtual_set_window_cursor (GdkDevice *device,
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GdkWindow *window,
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GdkCursor *cursor);
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static void gdk_device_virtual_warp (GdkDevice *device,
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GdkScreen *screen,
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gdouble x,
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gdouble y);
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static void gdk_device_virtual_query_state (GdkDevice *device,
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GdkWindow *window,
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GdkWindow **root_window,
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GdkWindow **child_window,
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gdouble *root_x,
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gdouble *root_y,
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gdouble *win_x,
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gdouble *win_y,
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GdkModifierType *mask);
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static GdkGrabStatus gdk_device_virtual_grab (GdkDevice *device,
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GdkWindow *window,
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gboolean owner_events,
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GdkEventMask event_mask,
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GdkWindow *confine_to,
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GdkCursor *cursor,
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guint32 time_);
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static void gdk_device_virtual_ungrab (GdkDevice *device,
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guint32 time_);
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static GdkWindow * gdk_device_virtual_window_at_position (GdkDevice *device,
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gdouble *win_x,
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gdouble *win_y,
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GdkModifierType *mask,
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gboolean get_toplevel);
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static void gdk_device_virtual_select_window_events (GdkDevice *device,
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GdkWindow *window,
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GdkEventMask event_mask);
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G_DEFINE_TYPE (GdkDeviceVirtual, gdk_device_virtual, GDK_TYPE_DEVICE)
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static void
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gdk_device_virtual_class_init (GdkDeviceVirtualClass *klass)
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{
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GdkDeviceClass *device_class = GDK_DEVICE_CLASS (klass);
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device_class->get_history = gdk_device_virtual_get_history;
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device_class->get_state = gdk_device_virtual_get_state;
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device_class->set_window_cursor = gdk_device_virtual_set_window_cursor;
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device_class->warp = gdk_device_virtual_warp;
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device_class->query_state = gdk_device_virtual_query_state;
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device_class->grab = gdk_device_virtual_grab;
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device_class->ungrab = gdk_device_virtual_ungrab;
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device_class->window_at_position = gdk_device_virtual_window_at_position;
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device_class->select_window_events = gdk_device_virtual_select_window_events;
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}
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static void
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gdk_device_virtual_init (GdkDeviceVirtual *device_virtual)
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{
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}
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void
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_gdk_device_virtual_set_active (GdkDevice *device,
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GdkDevice *new_active)
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{
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GdkDeviceVirtual *virtual = GDK_DEVICE_VIRTUAL (device);
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int n_axes, i;
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GdkAtom label_atom;
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GdkAxisUse use;
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gdouble min_value, max_value, resolution;
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if (virtual->active_device == new_active)
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return;
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virtual->active_device = new_active;
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if (gdk_device_get_source (device) != GDK_SOURCE_KEYBOARD)
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{
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_gdk_device_reset_axes (device);
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n_axes = gdk_device_get_n_axes (new_active);
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for (i = 0; i < n_axes; i++)
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{
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_gdk_device_get_axis_info (new_active, i,
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&label_atom, &use,
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&min_value, &max_value, &resolution);
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_gdk_device_add_axis (device,
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label_atom, use,
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min_value, max_value, resolution);
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}
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}
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g_signal_emit_by_name (G_OBJECT (device), "changed");
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}
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static gboolean
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gdk_device_virtual_get_history (GdkDevice *device,
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GdkWindow *window,
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guint32 start,
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guint32 stop,
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GdkTimeCoord ***events,
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gint *n_events)
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{
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/* History is only per slave device */
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return FALSE;
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}
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static void
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gdk_device_virtual_get_state (GdkDevice *device,
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GdkWindow *window,
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gdouble *axes,
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GdkModifierType *mask)
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{
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GdkDeviceVirtual *virtual = GDK_DEVICE_VIRTUAL (device);
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GdkDevice *active = virtual->active_device;
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GDK_DEVICE_GET_CLASS (active)->get_state (active,
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window, axes, mask);
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}
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static void
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gdk_device_virtual_set_window_cursor (GdkDevice *device,
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GdkWindow *window,
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GdkCursor *cursor)
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{
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GdkWindow *parent_window;
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GdkWindowImplWin32 *impl;
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GdkCursor *replacement_cursor;
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GdkCursor *previous_cursor;
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impl = GDK_WINDOW_IMPL_WIN32 (window->impl);
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previous_cursor = impl->cursor;
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if (cursor != NULL && GDK_WIN32_CURSOR (cursor)->hcursor != NULL)
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{
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/* If the pointer is over our window, set new cursor */
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GdkWindow *curr_window = gdk_window_get_device_position (window, device, NULL, NULL, NULL);
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if (curr_window == window ||
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(curr_window && window == gdk_window_get_toplevel (curr_window)))
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SetCursor (GDK_WIN32_CURSOR (cursor)->hcursor);
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else
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{
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/* Climb up the tree and find whether our window is the
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* first ancestor that has cursor defined, and if so, set
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* new cursor.
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*/
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while (curr_window && curr_window->impl &&
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!GDK_WINDOW_IMPL_WIN32 (curr_window->impl)->cursor)
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{
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curr_window = curr_window->parent;
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if (curr_window == GDK_WINDOW (window))
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{
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SetCursor (GDK_WIN32_CURSOR (cursor)->hcursor);
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break;
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}
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}
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}
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}
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/* Unset the previous cursor: Need to make sure it's no longer in
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* use before we destroy it, in case we're not over our window but
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* the cursor is still set to our old one.
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*/
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if (previous_cursor != NULL &&
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GetCursor () == GDK_WIN32_CURSOR (previous_cursor)->hcursor)
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{
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/* Look for a suitable cursor to use instead */
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replacement_cursor = NULL;
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parent_window = GDK_WINDOW (window)->parent;
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while (replacement_cursor == NULL)
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{
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if (parent_window)
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{
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impl = GDK_WINDOW_IMPL_WIN32 (parent_window->impl);
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replacement_cursor = impl->cursor;
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parent_window = parent_window->parent;
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}
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else
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replacement_cursor = _gdk_win32_display_get_cursor_for_type (_gdk_display, GDK_LEFT_PTR);
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}
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SetCursor (GDK_WIN32_CURSOR (replacement_cursor)->hcursor);
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}
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}
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static void
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gdk_device_virtual_warp (GdkDevice *device,
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GdkScreen *screen,
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gdouble x,
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gdouble y)
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{
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SetCursorPos (x - _gdk_offset_x, y - _gdk_offset_y);
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}
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static void
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gdk_device_virtual_query_state (GdkDevice *device,
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GdkWindow *window,
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GdkWindow **root_window,
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GdkWindow **child_window,
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gdouble *root_x,
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gdouble *root_y,
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gdouble *win_x,
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gdouble *win_y,
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GdkModifierType *mask)
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{
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GdkDeviceVirtual *virtual = GDK_DEVICE_VIRTUAL (device);
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_gdk_device_query_state (virtual->active_device,
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window, root_window, child_window,
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root_x, root_y,
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win_x, win_y,
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mask);
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}
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static GdkGrabStatus
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gdk_device_virtual_grab (GdkDevice *device,
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GdkWindow *window,
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gboolean owner_events,
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GdkEventMask event_mask,
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GdkWindow *confine_to,
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GdkCursor *cursor,
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guint32 time_)
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{
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GdkWindowImplWin32 *impl = GDK_WINDOW_IMPL_WIN32 (window->impl);
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if (gdk_device_get_source (device) != GDK_SOURCE_KEYBOARD)
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{
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if (_gdk_win32_grab_cursor != NULL)
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{
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if (GetCursor () == GDK_WIN32_CURSOR (_gdk_win32_grab_cursor)->hcursor)
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SetCursor (NULL);
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g_clear_object (&_gdk_win32_grab_cursor);
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}
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_gdk_win32_grab_cursor = cursor;
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if (_gdk_win32_grab_cursor != NULL)
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SetCursor (GDK_WIN32_CURSOR (_gdk_win32_grab_cursor)->hcursor);
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else if (impl->cursor != NULL)
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SetCursor (GDK_WIN32_CURSOR (impl->cursor)->hcursor);
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else
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SetCursor (LoadCursor (NULL, IDC_ARROW));
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SetCapture (GDK_WINDOW_HWND (window));
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}
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return GDK_GRAB_SUCCESS;
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}
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static void
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gdk_device_virtual_ungrab (GdkDevice *device,
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guint32 time_)
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{
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GdkDeviceGrabInfo *info;
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GdkDisplay *display;
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display = gdk_device_get_display (device);
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info = _gdk_display_get_last_device_grab (display, device);
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if (info)
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info->serial_end = 0;
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if (gdk_device_get_source (device) != GDK_SOURCE_KEYBOARD)
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{
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if (_gdk_win32_grab_cursor != NULL)
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{
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if (GetCursor () == GDK_WIN32_CURSOR (_gdk_win32_grab_cursor)->hcursor)
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SetCursor (NULL);
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g_clear_object (&_gdk_win32_grab_cursor);
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}
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_gdk_win32_grab_cursor = NULL;
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ReleaseCapture ();
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}
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_gdk_display_device_grab_update (display, device, device, 0);
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}
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static void
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screen_to_client (HWND hwnd, POINT screen_pt, POINT *client_pt)
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{
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*client_pt = screen_pt;
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ScreenToClient (hwnd, client_pt);
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}
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static GdkWindow *
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gdk_device_virtual_window_at_position (GdkDevice *device,
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gdouble *win_x,
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gdouble *win_y,
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GdkModifierType *mask,
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gboolean get_toplevel)
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{
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GdkWindow *window = NULL;
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POINT screen_pt, client_pt;
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HWND hwnd, hwndc;
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RECT rect;
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GetCursorPos (&screen_pt);
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if (get_toplevel)
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{
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/* Only consider visible children of the desktop to avoid the various
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* non-visible windows you often find on a running Windows box. These
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* might overlap our windows and cause our walk to fail. As we assume
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* WindowFromPoint() can find our windows, we follow similar logic
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* here, and ignore invisible and disabled windows.
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*/
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hwnd = GetDesktopWindow ();
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do {
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window = gdk_win32_handle_table_lookup (hwnd);
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if (window != NULL &&
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GDK_WINDOW_TYPE (window) != GDK_WINDOW_ROOT &&
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GDK_WINDOW_TYPE (window) != GDK_WINDOW_FOREIGN)
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break;
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screen_to_client (hwnd, screen_pt, &client_pt);
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hwndc = ChildWindowFromPointEx (hwnd, client_pt, CWP_SKIPDISABLED |
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CWP_SKIPINVISIBLE);
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/* Verify that we're really inside the client area of the window */
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if (hwndc != hwnd)
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{
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GetClientRect (hwndc, &rect);
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screen_to_client (hwndc, screen_pt, &client_pt);
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if (!PtInRect (&rect, client_pt))
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hwndc = hwnd;
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}
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} while (hwndc != hwnd && (hwnd = hwndc, 1));
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}
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else
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{
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hwnd = WindowFromPoint (screen_pt);
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/* Verify that we're really inside the client area of the window */
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GetClientRect (hwnd, &rect);
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screen_to_client (hwnd, screen_pt, &client_pt);
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if (!PtInRect (&rect, client_pt))
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hwnd = NULL;
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/* If we didn't hit any window at that point, return the desktop */
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if (hwnd == NULL)
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{
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if (win_x)
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*win_x = screen_pt.x + _gdk_offset_x;
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if (win_y)
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*win_y = screen_pt.y + _gdk_offset_y;
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return _gdk_root;
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}
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window = gdk_win32_handle_table_lookup (hwnd);
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}
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if (window && (win_x || win_y))
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{
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if (win_x)
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*win_x = client_pt.x;
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if (win_y)
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*win_y = client_pt.y;
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}
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return window;
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}
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static void
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gdk_device_virtual_select_window_events (GdkDevice *device,
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GdkWindow *window,
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GdkEventMask event_mask)
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{
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}
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