Added old abandoned KDE3 version of the RoseGarden MIDI tool

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/applications/rosegarden@1097595 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 201 insertions, 0 deletions

diff --git a/src/gui/kdeext/QCanvasGroupableItem.h b/src/gui/kdeext/QCanvasGroupableItem.h
new file mode 100644
index 0000000..97d1917
--- /dev/null
+++ b/src/gui/kdeext/QCanvasGroupableItem.h
@@ -0,0 +1,201 @@
+// -*- c-basic-offset: 4 -*-
+
+/*
+    Rosegarden
+    A sequencer and musical notation editor.
+
+    This program is Copyright 2000-2008
+        Guillaume Laurent   <[email protected]>,
+        Chris Cannam        <[email protected]>,
+        Richard Bown        <[email protected]>
+
+    The moral right of the authors to claim authorship of this work
+    has been asserted.
+
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#ifndef QCANVASGROUPABLEITEM_H
+#define QCANVASGROUPABLEITEM_H
+
+#include <qcanvas.h>
+
+class QCanvasItemGroup;
+
+/**
+ * This class is meant to be inherited by QCanvasItem children to make
+ * them groupable.
+ *
+ * On destruction, the item will remove itself from the group it's
+ * attached to.
+ *
+ * @see QCanvasSpriteGroupable
+ * @see QCanvasLineGroupable
+ */
+class QCanvasGroupableItem
+{
+    friend class QCanvasItemGroup;
+
+public:
+
+    /**
+     * Create a groupable item, e.g. put the item in the specified
+     * QCanvasItemGroup. If withRelativeCoords is true, the item's
+     * position will be translated so that it's coordinates are
+     * relative to those of the item group.
+     *
+     * @see QCanvasItemGroup#addItemWithRelativeCoords()
+     */
+    QCanvasGroupableItem(QCanvasItem*, QCanvasItemGroup*,
+                         bool withRelativeCoords = false);
+
+    virtual ~QCanvasGroupableItem();
+
+    /// Returns the QCanvasItemGroup this groupable item belongs to
+    QCanvasItemGroup* group() { return m_group; }
+
+    /// Returns the QCanvasItemGroup this groupable item belongs to
+    const QCanvasItemGroup* group() const { return m_group; }
+
+    /// Returns the QCanvasItem which this groupable item wraps
+    QCanvasItem *item() { return m_item; }
+
+    /**
+     * Same as moveBy(), except that the move is done relative to the
+     * item group's coordinates
+     */
+    virtual void relativeMoveBy(double dx, double dy);
+
+protected:
+    /**
+     * Detach item from the item group - called by QCanvasItemGroup only
+     *
+     * Set m_group to 0, so that on destruction the item won't try to
+     * remove itself from the group
+     */
+    void detach();
+    
+private:
+    //--------------- Data members ---------------------------------
+
+    QCanvasItemGroup* m_group;
+    QCanvasItem*      m_item;
+
+};
+
+
+/**
+ * This class implements QCanvasItem groups
+ *
+ * An item group will keep its items in a fixed relative position when
+ * moved, just like in a drawing program where you can "bind" several
+ * items together so that they'll behave as a single item.
+ *
+ * Proper behavior requires collaboration from the QCanvasView,
+ * though. When about to move an item, the QCanvasView object should
+ * first check if it's not a groupable item, and if so fetch its
+ * QCanvasItemGroup and move it instead.
+ */
+class QCanvasItemGroup : public QCanvasItem
+{
+public: 
+    QCanvasItemGroup(QCanvas *);
+    virtual ~QCanvasItemGroup();
+
+    virtual void moveBy(double dx, double dy);
+    virtual void advance(int stage);
+    virtual bool collidesWith(const QCanvasItem*) const;
+    virtual void draw(QPainter&);
+    virtual void setVisible(bool yes);
+    virtual void setSelected(bool yes);
+    virtual void setEnabled(bool yes);
+    virtual void setActive(bool yes);
+    virtual int rtti() const;
+    virtual QRect boundingRect() const;
+    virtual QRect boundingRectAdvanced() const;
+
+    /**
+     * Add a new item to this group.
+     *
+     * The item's coordinates are kept as is.
+     *
+     * @see addItemWithRelativeCoords()
+     */
+    virtual void addItem(QCanvasItem *);
+
+    /**
+     * Add a new item to this group.
+     *
+     * The item's coordinates are considered relative to the group.
+     * For example, suppose you have a QCanvasItemGroup whose coords
+     * are 10,10. If you call addItemWithRelativeCoords() with an item
+     * whose coords are 5,5, the item is moved so that its coords
+     * will be 5,5 relative to the group (e.g. 15,15).
+     *
+     * @see addItem()
+     */
+    virtual void addItemWithRelativeCoords(QCanvasItem *);
+
+    /**
+     * Remove the specified item from the group
+     */
+    virtual void removeItem(QCanvasItem*);
+
+private:
+    virtual bool collidesWith(const QCanvasSprite*,
+                              const QCanvasPolygonalItem*,
+                              const QCanvasRectangle*,
+                              const QCanvasEllipse*,
+                              const QCanvasText* ) const;
+
+protected:
+    //--------------- Data members ---------------------------------
+
+    QCanvasItemList m_items;
+};
+
+
+/**
+ * A QCanvasLine which can be put in a QCanvasGroup
+ */
+class QCanvasLineGroupable : public QCanvasLine, public QCanvasGroupableItem
+{
+public: 
+    QCanvasLineGroupable(QCanvas *c, QCanvasItemGroup *g);
+};
+
+/**
+ * A QCanvasRectangle which can be put in a QCanvasGroup
+ */
+class QCanvasRectangleGroupable : public QCanvasRectangle, public QCanvasGroupableItem
+{
+public: 
+    QCanvasRectangleGroupable(QCanvas *c, QCanvasItemGroup *g);
+};
+
+/**
+ * A QCanvasText which can be put in a QCanvasGroup
+ */
+class QCanvasTextGroupable : public QCanvasText, public QCanvasGroupableItem
+{
+public: 
+    QCanvasTextGroupable(QCanvas *c, QCanvasItemGroup *g);
+    QCanvasTextGroupable(const QString&, QCanvas *c, QCanvasItemGroup *g);
+};
+
+/**
+ * A QCanvasSprite that can be put in a QCanvasGroup
+ */
+class QCanvasSpriteGroupable : public QCanvasSprite, public QCanvasGroupableItem
+{
+public:
+    QCanvasSpriteGroupable(QCanvasPixmapArray*,
+                           QCanvas*,
+                           QCanvasItemGroup*);
+};
+
+#endif