abstraction for style widget subjects

(bzr r4353)

1 files changed, 123 insertions, 0 deletions

diff --git a/src/ui/widget/style-subject.h b/src/ui/widget/style-subject.h
new file mode 100644
index 000000000..07ab64ab6
--- /dev/null
+++ b/src/ui/widget/style-subject.h
@@ -0,0 +1,123 @@
+/**
+ * \brief Abstraction for different style widget operands
+ *
+ * Copyright (C) 2007 MenTaLguY <mental@rydia.net>
+ *
+ * Released under GNU GPL.  Read the file 'COPYING' for more information.
+ */
+
+#ifndef SEEN_INKSCAPE_UI_WIDGET_STYLE_SUBJECT_H
+#define SEEN_INKSCAPE_UI_WIDGET_STYLE_SUBJECT_H
+
+#include "util/glib-list-iterators.h"
+#include "libnr/nr-maybe.h"
+#include "libnr/nr-rect.h"
+#include "sp-item.h"
+#include <sigc++/sigc++.h>
+
+class SPDesktop;
+class SPObject;
+class SPCSSAttr;
+class SPStyle;
+
+namespace Inkscape {
+class Selection;
+}
+
+namespace Inkscape {
+namespace UI {
+namespace Widget {
+
+class StyleSubject {
+public:
+    class Selection;
+    class CurrentLayer;
+
+    typedef Util::GSListConstIterator<SPObject *> iterator;
+
+    StyleSubject();
+    virtual ~StyleSubject();
+
+    void setDesktop(SPDesktop *desktop);
+    SPDesktop *getDesktop() const { return _desktop; }
+
+    virtual iterator begin() = 0;
+    virtual iterator end() { return iterator(NULL); }
+    virtual NR::Maybe<NR::Rect> getBounds(SPItem::BBoxType type = SPItem::APPROXIMATE_BBOX) = 0;
+    virtual int queryStyle(SPStyle *query, int property) = 0;
+    virtual void setCSS(SPCSSAttr *css) = 0;
+
+    sigc::connection connectChanged(sigc::signal<void>::slot_type slot) {
+        return _changed_signal.connect(slot);
+    }
+
+protected:
+    virtual void _afterDesktopSwitch(SPDesktop *desktop) {}
+    void _emitChanged() { _changed_signal.emit(); }
+
+private:
+    sigc::signal<void> _changed_signal;
+    SPDesktop *_desktop;
+};
+
+class StyleSubject::Selection : public StyleSubject {
+public:
+    Selection();
+    ~Selection();
+
+    virtual iterator begin();
+    virtual NR::Maybe<NR::Rect> getBounds(SPItem::BBoxType type = SPItem::APPROXIMATE_BBOX);
+    virtual int queryStyle(SPStyle *query, int property);
+    virtual void setCSS(SPCSSAttr *css);
+
+protected:
+    virtual void _afterDesktopSwitch(SPDesktop *desktop);
+
+private:
+    Inkscape::Selection *_getSelection() const;
+
+    sigc::connection _sel_changed;
+    sigc::connection _subsel_changed;
+    sigc::connection _sel_modified;
+};
+
+class StyleSubject::CurrentLayer : public StyleSubject {
+public:
+    CurrentLayer();
+    ~CurrentLayer();
+
+    virtual iterator begin();
+    virtual NR::Maybe<NR::Rect> getBounds(SPItem::BBoxType type = SPItem::APPROXIMATE_BBOX);
+    virtual int queryStyle(SPStyle *query, int property);
+    virtual void setCSS(SPCSSAttr *css);
+
+protected:
+    virtual void _afterDesktopSwitch(SPDesktop *desktop);
+
+private:
+    SPObject *_getLayer() const;
+    void _setLayer(SPObject *layer);
+    GSList *_getLayerSList() const;
+
+    sigc::connection _layer_switched;
+    sigc::connection _layer_release;
+    sigc::connection _layer_modified;
+    mutable GSList _element;
+};
+
+}
+}
+}
+
+#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:encoding=utf-8:textwidth=99 :