First GSoC node tool commit to Bazaar

(bzr r8846.1.1)

1 files changed, 133 insertions, 0 deletions

diff --git a/src/ui/tool/selector.cpp b/src/ui/tool/selector.cpp
new file mode 100644
index 000000000..f95c9e064
--- /dev/null
+++ b/src/ui/tool/selector.cpp
@@ -0,0 +1,133 @@
+/** @file
+ * Selector component (click and rubberband)
+ */
+/* Authors:
+ *   Krzysztof Kosiński <tweenk.pl@gmail.com>
+ *
+ * Copyright (C) 2009 Authors
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#include "desktop.h"
+#include "desktop-handles.h"
+#include "display/sodipodi-ctrlrect.h"
+#include "event-context.h"
+#include "preferences.h"
+#include "ui/tool/control-point.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 fed */
+class SelectorPoint : public ControlPoint {
+public:
+    SelectorPoint(SPDesktop *d, SPCanvasGroup *group, Selector *s)
+        : ControlPoint(d, Geom::Point(0,0), Gtk::ANCHOR_CENTER, SP_CTRL_SHAPE_SQUARE,
+            1, &invisible_cset, group)
+        , _selector(s)
+        , _cancel(false)
+    {
+        setVisible(false);
+        _rubber = static_cast<CtrlRect*>(sp_canvas_item_new(sp_desktop_controls(_desktop),
+        SP_TYPE_CTRLRECT, NULL));
+        sp_canvas_item_hide(_rubber);
+
+        signal_clicked.connect(sigc::mem_fun(*this, &SelectorPoint::_clicked));
+        signal_grabbed.connect(
+            sigc::bind_return(
+                sigc::hide(
+                    sigc::mem_fun(*this, &SelectorPoint::_grabbed)),
+                false));
+        signal_dragged.connect(
+                sigc::hide<0>( sigc::hide(
+                    sigc::mem_fun(*this, &SelectorPoint::_dragged))));
+        signal_ungrabbed.connect(sigc::mem_fun(*this, &SelectorPoint::_ungrabbed));
+    }
+    ~SelectorPoint() {
+        gtk_object_destroy(_rubber);
+    }
+    SPDesktop *desktop() { return _desktop; }
+    bool event(GdkEvent *e) {
+        return _eventHandler(e);
+    }
+
+protected:
+    virtual bool _eventHandler(GdkEvent *event) {
+        if (event->type == GDK_KEY_PRESS && shortcut_key(event->key) == GDK_Escape &&
+            sp_canvas_item_is_visible(_rubber))
+        {
+            _cancel = true;
+            sp_canvas_item_hide(_rubber);
+            return true;
+        }
+        return ControlPoint::_eventHandler(event);
+    }
+
+private:
+    bool _clicked(GdkEventButton *event) {
+        if (event->button != 1) return false;
+        _selector->signal_point.emit(position(), event);
+        return true;
+    }
+    void _grabbed() {
+        _cancel = false;
+        _start = position();
+        sp_canvas_item_show(_rubber);
+    }
+    void _dragged(Geom::Point &new_pos) {
+        if (_cancel) return;
+        Geom::Rect sel(_start, new_pos);
+        _rubber->setRectangle(sel);
+    }
+    void _ungrabbed(GdkEventButton *event) {
+        if (_cancel) return;
+        sp_canvas_item_hide(_rubber);
+        Geom::Rect sel(_start, position());
+        _selector->signal_area.emit(sel, event);
+    }
+    CtrlRect *_rubber;
+    Selector *_selector;
+    Geom::Point _start;
+    bool _cancel;
+};
+
+
+Selector::Selector(SPDesktop *d)
+    : Manipulator(d)
+    , _dragger(new SelectorPoint(d, sp_desktop_controls(d), this))
+{
+    _dragger->setVisible(false);
+}
+
+Selector::~Selector()
+{
+    delete _dragger;
+}
+
+bool Selector::event(GdkEvent *event)
+{
+    switch (event->type) {
+    case GDK_BUTTON_PRESS:
+        _dragger->setPosition(_desktop->w2d(event_point(event->motion)));
+        break;
+    default: break;
+    }
+    return _dragger->event(event);
+}
+
+} // 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:encoding=utf-8:textwidth=99 :