forked from AuroraMiddleware/gtk
Implement GtkColorPicker for Windows
Fixes https://gitlab.gnome.org/GNOME/gtk/-/issues/5136
This commit is contained in:
Luca Bacci
parent
46483bebcd
commit
86a38918d7
@ -21,6 +21,11 @@
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#include "gtkcolorpickerportalprivate.h"
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#include "gtkcolorpickershellprivate.h"
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#include "gtkcolorpickerkwinprivate.h"
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#ifdef G_OS_WIN32
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#include "gtkcolorpickerwin32private.h"
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#endif
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#include <gio/gio.h>
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@ -51,13 +56,19 @@ gtk_color_picker_pick_finish (GtkColorPicker *picker,
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GtkColorPicker *
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gtk_color_picker_new (void)
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{
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GtkColorPicker *picker;
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GtkColorPicker *picker = NULL;
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picker = gtk_color_picker_portal_new ();
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#if defined (G_OS_UNIX)
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if (!picker)
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picker = gtk_color_picker_portal_new ();
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if (!picker)
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picker = gtk_color_picker_shell_new ();
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if (!picker)
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picker = gtk_color_picker_kwin_new ();
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#elif defined (G_OS_WIN32)
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if (!picker)
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picker = gtk_color_picker_win32_new ();
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#endif
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if (!picker)
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g_debug ("No suitable GtkColorPicker implementation");
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246
gtk/gtkcolorpickerwin32.c
Normal file
246
gtk/gtkcolorpickerwin32.c
Normal file
@ -0,0 +1,246 @@
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/* GTK - The GIMP Toolkit
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* Copyright (C) 2022 the GTK team
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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 "gtkcolorpickerwin32private.h"
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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GList *pickers;
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HHOOK hook;
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static void remove_hook (void);
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extern IMAGE_DOS_HEADER __ImageBase;
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#define this_hmodule ((HMODULE)&__ImageBase)
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struct _GtkColorPickerWin32
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{
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GObject parent_instance;
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GTask *task;
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POINT point;
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};
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struct _GtkColorPickerWin32Class
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{
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GObjectClass parent_class;
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};
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static GInitableIface *initable_parent_iface;
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static void gtk_color_picker_win32_initable_iface_init (GInitableIface *iface);
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static void gtk_color_picker_win32_iface_init (GtkColorPickerInterface *iface);
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G_DEFINE_TYPE_WITH_CODE (GtkColorPickerWin32, gtk_color_picker_win32, G_TYPE_OBJECT,
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G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE, gtk_color_picker_win32_initable_iface_init)
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G_IMPLEMENT_INTERFACE (GTK_TYPE_COLOR_PICKER, gtk_color_picker_win32_iface_init))
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static gboolean
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gtk_color_picker_win32_initable_init (GInitable *initable,
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GCancellable *cancellable,
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GError **error)
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{
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return TRUE;
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}
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static void
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gtk_color_picker_win32_initable_iface_init (GInitableIface *iface)
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{
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initable_parent_iface = g_type_interface_peek_parent (iface);
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iface->init = gtk_color_picker_win32_initable_init;
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}
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static void
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gtk_color_picker_win32_init (GtkColorPickerWin32 *picker)
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{
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}
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static void
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gtk_color_picker_win32_class_init (GtkColorPickerWin32Class *class)
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{
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}
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GtkColorPicker *
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gtk_color_picker_win32_new (void)
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{
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return GTK_COLOR_PICKER (g_initable_new (GTK_TYPE_COLOR_PICKER_WIN32, NULL, NULL, NULL));
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}
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static void
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on_task_completed (GObject *object,
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GParamSpec *pspec,
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gpointer user_data)
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{
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gpointer source = g_task_get_source_object (G_TASK (object));
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GtkColorPickerWin32 *picker = GTK_COLOR_PICKER_WIN32 (source);
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g_clear_object (&picker->task);
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}
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static void
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pick_color (GTask *task,
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gpointer source_object,
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gpointer task_data,
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GCancellable *cancellable)
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{
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GtkColorPickerWin32 *picker = GTK_COLOR_PICKER_WIN32 (source_object);
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GdkRGBA rgba = (GdkRGBA) { 1.0, 1.0, 1.0, 1.0 };
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HDC hdc = GetDC(HWND_DESKTOP);
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if (hdc)
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{
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COLORREF color = GetPixel(hdc, picker->point.x, picker->point.y);
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rgba = (GdkRGBA){
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(double) GetRValue (color) / 255.0,
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(double) GetGValue (color) / 255.0,
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(double) GetBValue (color) / 255.0,
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1.0,
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};
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ReleaseDC (HWND_DESKTOP, hdc);
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}
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g_task_return_pointer (task,
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gdk_rgba_copy (&rgba),
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(GDestroyNotify) gdk_rgba_free);
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}
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static void
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picked (GtkColorPickerWin32 *picker)
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{
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g_task_run_in_thread (picker->task, pick_color);
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}
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static LRESULT CALLBACK
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mouse_proc (int nCode,
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WPARAM wParam,
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LPARAM lParam)
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{
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if (nCode == HC_ACTION)
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{
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MSLLHOOKSTRUCT *info = (MSLLHOOKSTRUCT*) lParam;
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switch (wParam)
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{
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case WM_LBUTTONDOWN:
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case WM_MBUTTONDOWN:
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case WM_RBUTTONDOWN:
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case WM_XBUTTONDOWN:
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{
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GtkColorPickerWin32 *picker = GTK_COLOR_PICKER_WIN32 (pickers->data);
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if (!pickers)
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break;
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/* A low-level mouse hook always receives screen points in
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* per-monitor DPI aware screen coordinates, regardless of
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* the DPI awareness setting of the application. */
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picker->point = info->pt;
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picked (picker);
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pickers = g_list_delete_link (pickers, pickers);
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/* It's safe to remove a hook from within its callback */
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if (!pickers)
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remove_hook ();
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return 1;
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}
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break;
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default:
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break;
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}
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}
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return CallNextHookEx(NULL, nCode, wParam, lParam);
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}
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static gboolean
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ensure_mouse_hook (void)
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{
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if (!hook)
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{
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hook = SetWindowsHookEx (WH_MOUSE_LL, mouse_proc, this_hmodule, 0);
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if (!hook)
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{
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g_warning ("SetWindowsHookEx failed with error code "
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"%"G_GUINT32_FORMAT, (unsigned) GetLastError ());
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return FALSE;
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}
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}
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return TRUE;
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}
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static void
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remove_hook (void)
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{
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if (hook)
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{
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UnhookWindowsHookEx (hook);
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hook = NULL;
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}
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}
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static void
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gtk_color_picker_win32_pick (GtkColorPicker *cp,
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GAsyncReadyCallback callback,
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gpointer user_data)
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{
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GtkColorPickerWin32 *picker = GTK_COLOR_PICKER_WIN32 (cp);
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if (picker->task)
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return;
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picker->task = g_task_new (picker, NULL, callback, user_data);
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g_task_set_name (picker->task, "GtkColorPicker");
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g_signal_connect (picker->task, "notify::completed",
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G_CALLBACK (on_task_completed),
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NULL);
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if (!ensure_mouse_hook ())
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{
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g_task_return_new_error (picker->task,
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G_IO_ERROR,
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G_IO_ERROR_FAILED,
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"Cannot capture the mouse pointer");
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return;
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}
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pickers = g_list_prepend (pickers, cp);
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}
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static GdkRGBA *
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gtk_color_picker_win32_pick_finish (GtkColorPicker *cp,
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GAsyncResult *res,
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GError **error)
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{
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g_return_val_if_fail (g_task_is_valid (res, cp), NULL);
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return g_task_propagate_pointer (G_TASK (res), error);
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}
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static void
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gtk_color_picker_win32_iface_init (GtkColorPickerInterface *iface)
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{
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iface->pick = gtk_color_picker_win32_pick;
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iface->pick_finish = gtk_color_picker_win32_pick_finish;
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}
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41
gtk/gtkcolorpickerwin32private.h
Normal file
41
gtk/gtkcolorpickerwin32private.h
Normal file
@ -0,0 +1,41 @@
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/*
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* GTK - The GIMP Toolkit
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* Copyright (C) 2022 the GTK team
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* All rights reserved.
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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 Library General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library 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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#ifndef __GTK_COLOR_PICKER_WIN32_H__
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#define __GTK_COLOR_PICKER_WIN32_H__
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#if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
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#error "Only <gtk/gtk.h> can be included directly."
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#endif
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#include <gtk/gtkcolorpickerprivate.h>
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G_BEGIN_DECLS
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#define GTK_TYPE_COLOR_PICKER_WIN32 gtk_color_picker_win32_get_type ()
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G_DECLARE_FINAL_TYPE (GtkColorPickerWin32, gtk_color_picker_win32, GTK, COLOR_PICKER_WIN32, GObject)
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GDK_AVAILABLE_IN_ALL
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GtkColorPicker * gtk_color_picker_win32_new (void);
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G_END_DECLS
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#endif /* __GTK_COLOR_PICKER_WIN32_H__ */
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@ -793,7 +793,10 @@ if os_win32
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])
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gtk_sources += gtk_win32_print_sources
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gtk_sources += ['gtkimcontextime.c']
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gtk_sources += [
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'gtkcolorpickerwin32.c',
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'gtkimcontextime.c'
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]
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if cc.has_header_symbol('windows.h', 'IPrintDialogCallback')
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cdata.set('HAVE_IPRINTDIALOGCALLBACK', 1)
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