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-rw-r--r--src/ui/tool/modifier-tracker.cpp94
1 files changed, 94 insertions, 0 deletions
diff --git a/src/ui/tool/modifier-tracker.cpp b/src/ui/tool/modifier-tracker.cpp
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * Fine-grained modifier tracker for event handling.
+ */
+/* Authors:
+ * Krzysztof KosiƄski <tweenk.pl@gmail.com>
+ *
+ * Copyright (C) 2009 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <gdk/gdk.h>
+#include <gdk/gdkkeysyms.h>
+#include "ui/tool/event-utils.h"
+#include "ui/tool/modifier-tracker.h"
+
+namespace Inkscape {
+namespace UI {
+
+ModifierTracker::ModifierTracker()
+ : _left_shift(false)
+ , _right_shift(false)
+ , _left_ctrl(false)
+ , _right_ctrl(false)
+ , _left_alt(false)
+ , _right_alt(false)
+{}
+
+bool ModifierTracker::event(GdkEvent *event)
+{
+ switch (event->type) {
+ case GDK_KEY_PRESS:
+ switch (shortcut_key(event->key)) {
+ case GDK_KEY_Shift_L:
+ _left_shift = true;
+ break;
+ case GDK_KEY_Shift_R:
+ _right_shift = true;
+ break;
+ case GDK_KEY_Control_L:
+ _left_ctrl = true;
+ break;
+ case GDK_KEY_Control_R:
+ _right_ctrl = true;
+ break;
+ case GDK_KEY_Alt_L:
+ _left_alt = true;
+ break;
+ case GDK_KEY_Alt_R:
+ _right_alt = true;
+ break;
+ }
+ break;
+ case GDK_KEY_RELEASE:
+ switch (shortcut_key(event->key)) {
+ case GDK_KEY_Shift_L:
+ _left_shift = false;
+ break;
+ case GDK_KEY_Shift_R:
+ _right_shift = false;
+ break;
+ case GDK_KEY_Control_L:
+ _left_ctrl = false;
+ break;
+ case GDK_KEY_Control_R:
+ _right_ctrl = false;
+ break;
+ case GDK_KEY_Alt_L:
+ _left_alt = false;
+ break;
+ case GDK_KEY_Alt_R:
+ _right_alt = false;
+ break;
+ }
+ break;
+ default: break;
+ }
+
+ return false;
+}
+
+} // 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 :