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c860492359
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
408 lines
12 KiB
C
408 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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}
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g_set_object (&_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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}
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g_clear_object (&_gdk_win32_grab_cursor);
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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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