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// SPDX-License-Identifier: GPL-2.0-or-later
/** @file
* Collection of shorthands to deal with GDK events.
*/
/* Authors:
* Krzysztof Kosiński <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 "display/sp-canvas.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;
}
unsigned combine_key_events(guint keyval, gint mask)
{
GdkEvent *event_next;
gint i = 0;
event_next = gdk_event_get();
// while the next event is also a key notify with the same keyval and mask,
while (event_next && (event_next->type == GDK_KEY_PRESS || event_next->type == GDK_KEY_RELEASE)
&& event_next->key.keyval == keyval
&& (!mask || event_next->key.state & mask)) {
if (event_next->type == GDK_KEY_PRESS)
i ++;
// kill it
gdk_event_free(event_next);
// get next
event_next = gdk_event_get();
}
// otherwise, put it back onto the queue
if (event_next) gdk_event_put(event_next);
return i;
}
unsigned combine_motion_events(SPCanvas *canvas, GdkEventMotion &event, gint mask)
{
if (canvas == nullptr) {
return false;
}
GdkEvent *event_next;
gint i = 0;
event.x -= canvas->_x0;
event.y -= canvas->_y0;
event_next = gdk_event_get();
// while the next event is also a motion notify
while (event_next && (event_next->type == GDK_MOTION_NOTIFY)
&& (!mask || event_next->motion.state & mask))
{
if (event_next->motion.device == event.device) {
GdkEventMotion &next = event_next->motion;
event.send_event = next.send_event;
event.time = next.time;
event.x = next.x;
event.y = next.y;
event.state = next.state;
event.is_hint = next.is_hint;
event.x_root = next.x_root;
event.y_root = next.y_root;
if (event.axes && next.axes) {
memcpy(event.axes, next.axes, gdk_device_get_n_axes(event.device));
}
}
// kill it
gdk_event_free(event_next);
event_next = gdk_event_get();
i++;
}
// otherwise, put it back onto the queue
if (event_next) {
gdk_event_put(event_next);
}
event.x += canvas->_x0;
event.y += canvas->_y0;
return i;
}
/** 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 :
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