Adding upstream version 1.2.2.upstream/1.2.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 208 insertions, 0 deletions

diff --git a/src/ui/knot/knot.h b/src/ui/knot/knot.h
new file mode 100644
index 0000000..59104e7
--- /dev/null
+++ b/src/ui/knot/knot.h
@@ -0,0 +1,208 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#ifndef SEEN_SP_KNOT_H
+#define SEEN_SP_KNOT_H
+
+/** \file
+ * Declarations for SPKnot: Desktop-bound visual control object.
+ */
+/*
+ * Authors:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *
+ * Copyright (C) 1999-2002 authors
+ * Copyright (C) 2001-2002 Ximian, Inc.
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <2geom/point.h>
+#include <sigc++/sigc++.h>
+#include <glibmm/ustring.h>
+#include <glibmm/refptr.h>
+#include <gdkmm/cursor.h>
+
+#include "knot-enums.h"
+#include "display/control/canvas-item-enums.h"
+#include "enums.h"
+
+class SPDesktop;
+class SPItem;
+
+typedef union _GdkEvent GdkEvent;
+typedef unsigned int guint32;
+
+#define SP_KNOT(obj) (dynamic_cast<SPKnot*>(static_cast<SPKnot*>(obj)))
+#define SP_IS_KNOT(obj) (dynamic_cast<const SPKnot*>(static_cast<const SPKnot*>(obj)) != NULL)
+
+namespace Inkscape {
+class CanvasItemCtrl;
+}
+
+/**
+ * Desktop-bound visual control object.
+ *
+ * A knot is a draggable object, with callbacks to change something by
+ * dragging it, visually represented by a canvas item (mostly square).
+ *
+ * See also KnotHolderEntity.
+ * See also ControlPoint (which does the same kind of things).
+ */
+class SPKnot {
+public:
+    SPKnot(SPDesktop *desktop, char const *tip, Inkscape::CanvasItemCtrlType type, Glib::ustring const & name = Glib::ustring("unknown"));
+    virtual ~SPKnot();
+
+    SPKnot(SPKnot const&) = delete;
+    SPKnot& operator=(SPKnot const&) = delete;
+
+    int ref_count; // FIXME encapsulation
+
+    SPDesktop *desktop  = nullptr;                  /**< Desktop we are on. */
+    Inkscape::CanvasItemCtrl *ctrl = nullptr;       /**< Our CanvasItemCtrl. */
+    SPItem *owner       = nullptr;                  /**< Optional Owner Item */
+    SPItem *sub_owner   = nullptr;                  /**< Optional SubOwner Item */
+    unsigned int flags  = SP_KNOT_VISIBLE;
+
+    unsigned int size   = 9;                        /**< Always square. Must be odd. */
+    bool size_set       = false;                    /**< Use default size unless explicitly set. */
+    double angle        = 0.0;                      /**< Angle of mesh handle. */
+    Geom::Point pos;                                /**< Our desktop coordinates. */
+    Geom::Point grabbed_rel_pos;                    /**< Grabbed relative position. */
+    Geom::Point drag_origin;                        /**< Origin of drag. */
+    SPAnchorType anchor = SP_ANCHOR_CENTER;         /**< Anchor. */
+
+    bool grabbed        = false;
+    bool moved          = false;
+    int  xp             = 0.0;                      /**< Where drag started */
+    int  yp             = 0.0;                      /**< Where drag started */
+    int  tolerance      = 0;
+    bool within_tolerance = false;
+    bool transform_escaped = false; // true iff resize or rotate was cancelled by esc.
+
+    Inkscape::CanvasItemCtrlShape shape = Inkscape::CANVAS_ITEM_CTRL_SHAPE_SQUARE;   /**< Shape type. */
+    bool shape_set      = false;                    /**< Use default shape unless explicitly set. */
+    Inkscape::CanvasItemCtrlMode mode = Inkscape::CANVAS_ITEM_CTRL_MODE_XOR;
+
+    guint32 fill[SP_KNOT_VISIBLE_STATES];
+    guint32 stroke[SP_KNOT_VISIBLE_STATES];
+    unsigned char *image[SP_KNOT_VISIBLE_STATES];
+    Glib::RefPtr<Gdk::Cursor> _cursors[SP_KNOT_VISIBLE_STATES];
+
+    void* pixbuf            = nullptr;
+    char *tip               = nullptr;
+
+    sigc::connection _event_connection;
+
+    double pressure         = 0.0;    /**< The tablet pen pressure when the knot is being dragged. */
+
+    // FIXME: signals should NOT need to emit the object they came from, the callee should
+    // be able to figure that out
+    sigc::signal<void, SPKnot *, unsigned int> click_signal;
+    sigc::signal<void, SPKnot*, unsigned int> doubleclicked_signal;
+    sigc::signal<void, SPKnot*, unsigned int> mousedown_signal;
+    sigc::signal<void, SPKnot*, unsigned int> grabbed_signal;
+    sigc::signal<void, SPKnot *, unsigned int> ungrabbed_signal;
+    sigc::signal<void, SPKnot *, Geom::Point const &, unsigned int> moved_signal;
+    sigc::signal<bool, SPKnot*, GdkEvent*> event_signal;
+
+    sigc::signal<bool, SPKnot*, Geom::Point*, unsigned int> request_signal;
+
+
+    //TODO: all the members above should eventualle become private, accessible via setters/getters
+    void setSize(unsigned int i);
+    void setShape(Inkscape::CanvasItemCtrlShape s);
+    void setAnchor(unsigned int i);
+    void setMode(Inkscape::CanvasItemCtrlMode m);
+    void setPixbuf(void* p);
+    void setAngle(double i);
+
+    void setFill(guint32 normal, guint32 mouseover, guint32 dragging, guint32 selected);
+    void setStroke(guint32 normal, guint32 mouseover, guint32 dragging, guint32 selected);
+    void setImage(unsigned char* normal, unsigned char* mouseover, unsigned char* dragging, unsigned char* selected);
+
+    void setCursor(SPKnotStateType type, Glib::RefPtr<Gdk::Cursor> cursor);
+
+    /**
+     * Show knot on its canvas.
+     */
+    void show();
+
+    /**
+     * Hide knot on its canvas.
+     */
+    void hide();
+
+    /**
+     * Set flag in knot, with side effects.
+     */
+    void setFlag(unsigned int flag, bool set);
+
+    /**
+     * Update knot's pixbuf and set its control state.
+     */
+    void updateCtrl();
+
+    /**
+     * Request or set new position for knot.
+     */
+    void requestPosition(Geom::Point const &pos, unsigned int state);
+
+    /**
+     * Update knot for dragging and tell canvas an item was grabbed.
+     */
+    void startDragging(Geom::Point const &p, int x, int y, guint32 etime);
+
+    /**
+     * Move knot to new position and emits "moved" signal.
+     */
+    void setPosition(Geom::Point const &p, unsigned int state);
+
+    /**
+     * Move knot to new position, without emitting a MOVED signal.
+     */
+    void moveto(Geom::Point const &p);
+    /**
+     * Select knot.
+     */
+    void selectKnot(bool select);
+
+    /**
+     * Returns position of knot.
+     */
+    Geom::Point position() const;
+
+    /**
+     * Event handler (from CanvasItem's).
+     */
+    bool eventHandler(GdkEvent *event);
+
+    bool is_visible()   const { return (flags & SP_KNOT_VISIBLE)   != 0; }
+    bool is_selected()  const { return (flags & SP_KNOT_SELECTED)  != 0; }
+    bool is_mouseover() const { return (flags & SP_KNOT_MOUSEOVER) != 0; }
+    bool is_dragging()  const { return (flags & SP_KNOT_DRAGGING)  != 0; }
+    bool is_grabbed()   const { return (flags & SP_KNOT_GRABBED)   != 0; }
+
+private:
+    /**
+     * Set knot control state (dragging/mouseover/normal).
+     */
+    void _setCtrlState();
+};
+
+void knot_ref(SPKnot* knot);
+void knot_unref(SPKnot* knot);
+
+void sp_knot_handler_request_position(GdkEvent *event, SPKnot *knot);
+
+#endif // SEEN_SP_KNOT_H
+
+/*
+  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 :