diff options
Diffstat (limited to '')
-rw-r--r-- | src/ui/tool/event-utils.cpp | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/src/ui/tool/event-utils.cpp b/src/ui/tool/event-utils.cpp new file mode 100644 index 0000000..f131d4f --- /dev/null +++ b/src/ui/tool/event-utils.cpp @@ -0,0 +1,93 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** @file + * Collection of shorthands to deal with GDK events. + */ +/* Authors: + * Krzysztof KosiĆski <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 : |