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-rw-r--r--src/ui/tool/event-utils.cpp93
1 files changed, 93 insertions, 0 deletions
diff --git a/src/ui/tool/event-utils.cpp b/src/ui/tool/event-utils.cpp
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * Collection of shorthands to deal with GDK events.
+ */
+/* Authors:
+ * Krzysztof KosiƄski <tweenk.pl@gmail.com>
+ *
+ * Copyright (C) 2009 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <cstring>
+#include <gdk/gdk.h>
+#include <gdk/gdkkeysyms.h>
+#include <gdkmm/display.h>
+#include "ui/tool/event-utils.h"
+
+namespace Inkscape {
+namespace UI {
+
+
+guint shortcut_key(GdkEventKey const &event)
+{
+ guint shortcut_key = 0;
+ gdk_keymap_translate_keyboard_state(
+ Gdk::Display::get_default()->get_keymap(),
+ event.hardware_keycode,
+ (GdkModifierType) event.state,
+ 0 /*event->key.group*/,
+ &shortcut_key, nullptr, nullptr, nullptr);
+ return shortcut_key;
+}
+
+/** Returns the modifier state valid after this event. Use this when you process events
+ * that change the modifier state. Currently handles only Shift, Ctrl, Alt. */
+unsigned state_after_event(GdkEvent *event)
+{
+ unsigned state = 0;
+ switch (event->type) {
+ case GDK_KEY_PRESS:
+ state = event->key.state;
+ switch(shortcut_key(event->key)) {
+ case GDK_KEY_Shift_L:
+ case GDK_KEY_Shift_R:
+ state |= GDK_SHIFT_MASK;
+ break;
+ case GDK_KEY_Control_L:
+ case GDK_KEY_Control_R:
+ state |= GDK_CONTROL_MASK;
+ break;
+ case GDK_KEY_Alt_L:
+ case GDK_KEY_Alt_R:
+ state |= GDK_MOD1_MASK;
+ break;
+ default: break;
+ }
+ break;
+ case GDK_KEY_RELEASE:
+ state = event->key.state;
+ switch(shortcut_key(event->key)) {
+ case GDK_KEY_Shift_L:
+ case GDK_KEY_Shift_R:
+ state &= ~GDK_SHIFT_MASK;
+ break;
+ case GDK_KEY_Control_L:
+ case GDK_KEY_Control_R:
+ state &= ~GDK_CONTROL_MASK;
+ break;
+ case GDK_KEY_Alt_L:
+ case GDK_KEY_Alt_R:
+ state &= ~GDK_MOD1_MASK;
+ break;
+ default: break;
+ }
+ break;
+ default: break;
+ }
+ return state;
+}
+
+} // namespace UI
+} // namespace Inkscape
+
+/*
+ Local Variables:
+ mode:c++
+ c-file-style:"stroustrup"
+ c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+ indent-tabs-mode:nil
+ fill-column:99
+ End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :