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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:24:48 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:24:48 +0000
commitcca66b9ec4e494c1d919bff0f71a820d8afab1fa (patch)
tree146f39ded1c938019e1ed42d30923c2ac9e86789 /src/ui/tool/selector.cpp
parentInitial commit. (diff)
downloadinkscape-upstream.tar.xz
inkscape-upstream.zip
Adding upstream version 1.2.2.upstream/1.2.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--src/ui/tool/selector.cpp153
1 files changed, 153 insertions, 0 deletions
diff --git a/src/ui/tool/selector.cpp b/src/ui/tool/selector.cpp
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+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * Selector component (click and rubberband)
+ */
+/* Authors:
+ * Krzysztof KosiƄski <tweenk.pl@gmail.com>
+ * Jon A. Cruz <jon@joncruz.org>
+ *
+ * Copyright (C) 2009 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <gdk/gdkkeysyms.h>
+
+#include "control-point.h"
+#include "desktop.h"
+
+#include "display/control/canvas-item-rect.h"
+
+#include "ui/tools/tool-base.h"
+#include "ui/tool/event-utils.h"
+#include "ui/tool/selector.h"
+
+namespace Inkscape {
+namespace UI {
+
+/** A hidden control point used for rubberbanding and selection.
+ * It uses a clever hack: the canvas item is hidden and only receives events when they
+ * are passed to it using Selector's event() function. When left mouse button
+ * is pressed, it grabs events and handles drags and clicks in the usual way. */
+class SelectorPoint : public ControlPoint {
+public:
+ SelectorPoint(SPDesktop *d, Inkscape::CanvasItemGroup *group, Selector *s) :
+ ControlPoint(d, Geom::Point(0,0), SP_ANCHOR_CENTER,
+ Inkscape::CANVAS_ITEM_CTRL_TYPE_INVISIPOINT,
+ invisible_cset, group),
+ _selector(s),
+ _cancel(false)
+ {
+ _canvas_item_ctrl->set_name("CanvasItemCtrl:SelectorPoint");
+ setVisible(false);
+ _rubber = new Inkscape::CanvasItemRect(_desktop->getCanvasControls());
+ _rubber->set_name("CanavasItemRect:SelectorPoint:Rubberband");
+ _rubber->set_stroke(0x8080ffff);
+ _rubber->set_inverted(true);
+ _rubber->hide();
+ }
+
+ ~SelectorPoint() override {
+ delete _rubber;
+ }
+
+ SPDesktop *desktop() { return _desktop; }
+
+ bool event(Inkscape::UI::Tools::ToolBase *ec, GdkEvent *e) {
+ return _eventHandler(ec, e);
+ }
+
+protected:
+ bool _eventHandler(Inkscape::UI::Tools::ToolBase *event_context, GdkEvent *event) override {
+ if (event->type == GDK_KEY_PRESS &&
+ shortcut_key(event->key) == GDK_KEY_Escape &&
+ _rubber->is_visible() )
+ {
+ _cancel = true;
+ _rubber->hide();
+ return true;
+ }
+ return ControlPoint::_eventHandler(event_context, event);
+ }
+
+private:
+ bool grabbed(GdkEventMotion *) override {
+ _cancel = false;
+ _start = position();
+ _rubber->show();
+ return false;
+ }
+
+ void dragged(Geom::Point &new_pos, GdkEventMotion *) override {
+ if (_cancel) return;
+ Geom::Rect sel(_start, new_pos);
+ _rubber->set_rect(sel);
+ }
+
+ void ungrabbed(GdkEventButton *event) override {
+ if (_cancel) return;
+ _rubber->hide();
+ Geom::Rect sel(_start, position());
+ _selector->signal_area.emit(sel, event);
+ }
+
+ bool clicked(GdkEventButton *event) override {
+ if (event->button != 1) return false;
+ _selector->signal_point.emit(position(), event);
+ return true;
+ }
+
+ Inkscape::CanvasItemRect *_rubber;
+ Selector *_selector;
+ Geom::Point _start;
+ bool _cancel;
+};
+
+
+Selector::Selector(SPDesktop *desktop)
+ : Manipulator(desktop)
+ , _dragger(new SelectorPoint(desktop, desktop->getCanvasControls(), this))
+{
+ _dragger->setVisible(false);
+}
+
+Selector::~Selector()
+{
+ delete _dragger;
+}
+
+bool Selector::event(Inkscape::UI::Tools::ToolBase *event_context, GdkEvent *event)
+{
+ // The hidden control point will capture all events after it obtains the grab,
+ // but it relies on this function to initiate it. If we pass only first button
+ // press events here, it won't interfere with any other event handling.
+ switch (event->type) {
+ case GDK_BUTTON_PRESS:
+ // Do not pass button presses other than left button to the control point.
+ // This way middle click and right click can be handled in ToolBase.
+ if (event->button.button == 1 && !event_context->is_space_panning()) {
+ _dragger->setPosition(_desktop->w2d(event_point(event->motion)));
+ return _dragger->event(event_context, event);
+ }
+ break;
+ default: break;
+ }
+ return false;
+}
+
+bool Selector::doubleClicked() {
+ return _dragger->doubleClicked();
+}
+
+} // 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 :