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// SPDX-License-Identifier: GPL-2.0-or-later
/** @file
* Affine transform handles component
*/
/* Authors:
* Krzysztof Kosiński <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.
*/
#ifndef SEEN_UI_TOOL_TRANSFORM_HANDLE_SET_H
#define SEEN_UI_TOOL_TRANSFORM_HANDLE_SET_H
#include <memory>
#include <gdk/gdk.h>
#include <2geom/forward.h>
#include "ui/tool/commit-events.h"
#include "ui/tool/manipulator.h"
#include "ui/tool/control-point.h"
#include "enums.h"
#include "snap-candidate.h"
class SPDesktop;
namespace Inkscape {
class CanvasItemGroup;
class CanvasItemRect;
namespace UI {
class RotateHandle;
class SkewHandle;
class ScaleCornerHandle;
class ScaleSideHandle;
class RotationCenter;
class TransformHandleSet : public Manipulator {
public:
enum Mode {
MODE_SCALE,
MODE_ROTATE_SKEW
};
TransformHandleSet(SPDesktop *d, Inkscape::CanvasItemGroup *th_group);
~TransformHandleSet() override;
bool event(Inkscape::UI::Tools::ToolBase *, GdkEvent *) override;
bool visible() const { return _visible; }
Mode mode() const { return _mode; }
Geom::Rect bounds() const;
void setVisible(bool v);
/** Sets the mode of transform handles (scale or rotate). */
void setMode(Mode m);
void setBounds(Geom::Rect const &, bool preserve_center = false);
bool transforming() { return _in_transform; }
ControlPoint const &rotationCenter() const;
ControlPoint &rotationCenter();
sigc::signal<void, Geom::Affine const &> signal_transform;
sigc::signal<void, CommitEvent> signal_commit;
private:
void _emitTransform(Geom::Affine const &);
void _setActiveHandle(ControlPoint *h);
void _clearActiveHandle();
/** Update the visibility of transformation handles according to settings and the dimensions
* of the bounding box. It hides the handles that would have no effect or lead to
* discontinuities. Additionally, side handles for which there is no space are not shown.
*/
void _updateVisibility(bool v);
// TODO unions must GO AWAY:
union {
ControlPoint *_handles[17];
struct {
ScaleCornerHandle *_scale_corners[4];
ScaleSideHandle *_scale_sides[4];
RotateHandle *_rot_corners[4];
SkewHandle *_skew_sides[4];
RotationCenter *_center;
};
};
ControlPoint *_active;
Inkscape::CanvasItemGroup *_transform_handle_group;
Inkscape::CanvasItemRect *_trans_outline;
Mode _mode;
bool _in_transform;
bool _visible;
friend class TransformHandle;
friend class RotationCenter;
};
/** Base class for node transform handles to simplify implementation. */
class TransformHandle : public ControlPoint
{
public:
TransformHandle(TransformHandleSet &th, SPAnchorType anchor, Inkscape::CanvasItemCtrlType type);
void getNextClosestPoint(bool reverse);
protected:
virtual void startTransform() {}
virtual void endTransform() {}
virtual Geom::Affine computeTransform(Geom::Point const &pos, GdkEventMotion *event) = 0;
virtual CommitEvent getCommitEvent() = 0;
Geom::Affine _last_transform;
Geom::Point _origin;
TransformHandleSet &_th;
std::vector<Inkscape::SnapCandidatePoint> _snap_points;
std::vector<Inkscape::SnapCandidatePoint> _unselected_points;
std::vector<Inkscape::SnapCandidatePoint> _all_snap_sources_sorted;
std::vector<Inkscape::SnapCandidatePoint>::iterator _all_snap_sources_iter;
private:
bool grabbed(GdkEventMotion *) override;
void dragged(Geom::Point &new_pos, GdkEventMotion *event) override;
void ungrabbed(GdkEventButton *) override;
static ColorSet thandle_cset;
};
} // namespace UI
} // namespace Inkscape
#endif
/*
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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