Theme Editor: Implemented resizing in RBMovable subclasses. Implementation is still somewhat crash-prone, but mostly works at this point

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27729 a1c6a512-1295-4272-9138-f99709370657

utils/themeeditor/graphics/rbalbumart.cpp

@@ -28,23 +28,17 @@
 RBAlbumArt::RBAlbumArt(QGraphicsItem *parent, int x, int y, int maxWidth,
                        int maxHeight, int artWidth, int artHeight,
                        ParseTreeNode* node, char hAlign, char vAlign)
-                           : RBMovable(parent), size(0, 0, maxWidth,
-                                                     maxHeight),
-                           artWidth(artWidth), artHeight(artHeight),
-                           hAlign(hAlign), vAlign(vAlign),
+                           : RBMovable(parent),artWidth(artWidth),
+                           artHeight(artHeight), hAlign(hAlign), vAlign(vAlign),
                            texture(":/render/albumart.png"), node(node)
 {
+    size = QRectF(0, 0, maxWidth, maxHeight);
     setFlag(ItemSendsGeometryChanges, false);
 
     setPos(x, y);
     hide();
 }
 
-QRectF RBAlbumArt::boundingRect() const
-{
-    return size;
-}
-
 void RBAlbumArt::paint(QPainter *painter,
                        const QStyleOptionGraphicsItem *option, QWidget *widget)
 {

utils/themeeditor/graphics/rbalbumart.h

@@ -35,7 +35,6 @@ public:
                int artWidth, int artHeight, ParseTreeNode* node,
                char hAlign = 'c', char vAlign = 'c');
 
-    QRectF boundingRect() const;
     void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
                QWidget *widget);
 
@@ -48,7 +47,6 @@ protected:
     void saveGeometry();
 
 private:
-    QRectF size;
     int artWidth;
     int artHeight;
     char hAlign;

utils/themeeditor/graphics/rbimage.cpp

@@ -79,11 +79,6 @@ RBImage::~RBImage()
         delete image;
 }
 
-QRectF RBImage::boundingRect() const
-{
-    return size;
-}
-
 void RBImage::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
                     QWidget *widget)
 {

utils/themeeditor/graphics/rbimage.h

@@ -37,7 +37,6 @@ public:
     RBImage(const RBImage& other, QGraphicsItem* parent);
     virtual ~RBImage();
 
-    QRectF boundingRect() const;
     void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
                QWidget *widget);
 
@@ -62,8 +61,6 @@ private:
     int tiles;
     int currentTile;
 
-    QRectF size;
-
     ParseTreeNode* node;
 
 };

utils/themeeditor/graphics/rbmovable.cpp

@@ -19,13 +19,16 @@
  *
  ****************************************************************************/
 
+#include <QGraphicsSceneMouseEvent>
 #include <QPainter>
 #include <QDebug>
 
 #include "rbmovable.h"
 
+const double RBMovable::handleSize = 7;
+
 RBMovable::RBMovable(QGraphicsItem* parent)
-    : QGraphicsItem(parent), geomChanged(false)
+    : QGraphicsItem(parent), dragMode(None)
 {
     setFlags(ItemIsMovable | ItemIsSelectable | ItemSendsGeometryChanges);
 }
@@ -45,6 +48,11 @@ void RBMovable::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
         pen.setColor(Qt::green);
         painter->setPen(pen);
         painter->drawRect(boundingRect());
+
+        painter->fillRect(topLeftHandle(), Qt::green);
+        painter->fillRect(topRightHandle(), Qt::green);
+        painter->fillRect(bottomLeftHandle(), Qt::green);
+        painter->fillRect(bottomRightHandle(), Qt::green);
     }
 }
 
@@ -61,7 +69,6 @@ QVariant RBMovable::itemChange(GraphicsItemChange change, const QVariant &value)
         pos.setY(qMax(0., pos.y()));
         pos.setY(qMin(pos.y(), bound.height() - boundingRect().height()));
 
-        geomChanged = true;
 
         return pos;
     }
@@ -71,15 +78,223 @@ QVariant RBMovable::itemChange(GraphicsItemChange change, const QVariant &value)
 
 void RBMovable::mousePressEvent(QGraphicsSceneMouseEvent *event)
 {
+    if(!isSelected())
+    {
         QGraphicsItem::mousePressEvent(event);
+        return;
+    }
+
+    if(topLeftHandle().contains(event->pos()))
+    {
+        dragStartClick = event->pos() + pos();
+        dragStartPos = pos();
+        dragStartSize = boundingRect();
+
+        dWidthMin = -1. * pos().x();
+        dWidthMax = boundingRect().width() - childrenBoundingRect().right();
+
+        dHeightMin = -1. * pos().y();
+        dHeightMax = boundingRect().height() - childrenBoundingRect().bottom();
+
+        dragMode = TopLeft;
+    }
+    else if(topRightHandle().contains(event->pos()))
+    {
+        dragStartClick = event->pos() + pos();
+        dragStartPos = pos();
+        dragStartSize = boundingRect();
+
+        dWidthMin = childrenBoundingRect().width() - boundingRect().width();
+        dWidthMin = qMax(dWidthMin, -1. * size.width());
+        dWidthMax = parentItem()->boundingRect().width()
+                    - boundingRect().width() - pos().x();
+
+        dHeightMin = -1. * pos().y();
+        dHeightMax = boundingRect().height() - childrenBoundingRect().bottom();
+        dHeightMax = qMin(dHeightMax, boundingRect().height());
+
+        dragMode = TopRight;
+    }
+    else if(bottomLeftHandle().contains(event->pos()))
+    {
+        dragStartClick = event->pos() + pos();
+        dragStartPos = pos();
+        dragStartSize = boundingRect();
+
+        dWidthMin = -1. * pos().x();
+        dWidthMax = boundingRect().width() - childrenBoundingRect().right();
+        dWidthMax = qMin(dWidthMax, size.width());
+
+        dHeightMin = -1. * (boundingRect().height()
+                            - childrenBoundingRect().bottom());
+        dHeightMin = qMax(dHeightMin, -1. * boundingRect().height());
+
+        dragMode = BottomLeft;
+    }
+    else if(bottomRightHandle().contains(event->pos()))
+    {
+        dragStartClick = event->pos() + pos();
+        dragStartPos = pos();
+        dragStartSize = boundingRect();
+
+        dWidthMin = -1. * (boundingRect().width()
+                           - childrenBoundingRect().right());
+        dWidthMin = qMax(dWidthMin, -1. * boundingRect().width());
+        dWidthMax = parentItem()->boundingRect().width() -
+                    boundingRect().width() - pos().x();
+
+        dHeightMin = -1. * (boundingRect().height()
+                            - childrenBoundingRect().bottom());
+        dHeightMin = qMax(dHeightMin, -1. * boundingRect().height());
+        dHeightMax = parentItem()->boundingRect().height() -
+                     boundingRect().height() - pos().y();
+
+        dragMode = BottomRight;
+    }
+    else
+    {
+        QGraphicsItem::mousePressEvent(event);
+    }
+}
+
+void RBMovable::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
+{
+
+    QPointF absPos;
+    QPointF dPos;
+    QPointF dMouse;
+    switch(dragMode)
+    {
+    case None:
+        QGraphicsItem::mouseMoveEvent(event);
+        break;
+
+    case TopLeft:
+        /* Dragging from the top left corner */
+        absPos = event->pos() + pos();
+        dMouse = absPos - dragStartClick;
+
+        dPos.setX(qMin(dMouse.x(), dWidthMax));
+        dPos.setX(qMax(dPos.x(), dWidthMin));
+
+        dPos.setY(qMin(dMouse.y(), dHeightMax));
+        dPos.setY(qMax(dPos.y(), dHeightMin));
+
+        prepareGeometryChange();
+
+        setPos(dragStartPos + dPos);
+
+        size.setWidth(dragStartSize.width() - dPos.x());
+        size.setHeight(dragStartSize.height() - dPos.y());
+
+        break;
+
+    case TopRight:
+        /* Dragging from the top right corner */
+        absPos = event->pos() + pos();
+        dMouse = absPos - dragStartClick;
+
+        dPos.setX(qMin(dMouse.x(), dWidthMax));
+        dPos.setX(qMax(dPos.x(), dWidthMin));
+
+        dPos.setY(qMin(dMouse.y(), dHeightMax));
+        dPos.setY(qMax(dPos.y(), dHeightMin));
+
+        prepareGeometryChange();
+
+        setPos(dragStartPos.x(), dragStartPos.y() + dPos.y());
+
+        size.setWidth(dragStartSize.width() + dPos.x());
+        size.setHeight(dragStartSize.height() - dPos.y());
+
+        break;
+
+    case BottomLeft:
+        /* Dragging from the bottom left corner */
+        absPos = event->pos() + pos();
+        dMouse = absPos - dragStartClick;
+
+        dPos.setX(qMin(dMouse.x(), dWidthMax));
+        dPos.setX(qMax(dPos.x(), dWidthMin));
+
+        dPos.setY(qMin(dMouse.y(), dHeightMax));
+        dPos.setY(qMax(dPos.y(), dHeightMin));
+
+        prepareGeometryChange();
+        setPos(dragStartPos.x() + dPos.x(), dragStartPos.y());
+        size.setHeight(dragStartSize.height() + dPos.y());
+        size.setWidth(dragStartSize.width() - dPos.x());
+
+        break;
+
+    case BottomRight:
+        /* Dragging from the bottom right corner */
+        absPos = event->pos() + pos();
+        dMouse = absPos - dragStartClick;
+
+        dPos.setX(qMin(dMouse.x(), dWidthMax));
+        dPos.setX(qMax(dPos.x(), dWidthMin));
+
+        dPos.setY(qMin(dMouse.y(), dHeightMax));
+        dPos.setY(qMax(dPos.y(), dHeightMin));
+
+        prepareGeometryChange();
+
+        size.setWidth(dragStartSize.width() + dPos.x());
+        size.setHeight(dragStartSize.height() + dPos.y());
+
+        break;
+    }
 }
 
 void RBMovable::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 {
     QGraphicsItem::mouseReleaseEvent(event);
+
+    dragMode = None;
+
     if(isSelected())
     {
         saveGeometry();
-        geomChanged = false;
     }
 }
+
+QRectF RBMovable::topLeftHandle()
+{
+    QRectF bounds = boundingRect();
+    double width = qMin(bounds.width() / 2. - .5, handleSize);
+    double height = qMin(bounds.height() / 2. - .5, handleSize);
+    double size = qMin(width, height);
+
+    return QRectF(0, 0, size, size);
+}
+
+QRectF RBMovable::topRightHandle()
+{
+    QRectF bounds = boundingRect();
+    double width = qMin(bounds.width() / 2. - .5, handleSize);
+    double height = qMin(bounds.height() / 2. - .5, handleSize);
+    double size = qMin(width, height);
+
+    return QRectF(bounds.width() - size, 0, size, size);
+}
+
+QRectF RBMovable::bottomLeftHandle()
+{
+    QRectF bounds = boundingRect();
+    double width = qMin(bounds.width() / 2. - .5, handleSize);
+    double height = qMin(bounds.height() / 2. - .5, handleSize);
+    double size = qMin(width, height);
+
+    return QRectF(0, bounds.height() - size, size, size);
+}
+
+QRectF RBMovable::bottomRightHandle()
+{
+    QRectF bounds = boundingRect();
+    double width = qMin(bounds.width() / 2. - .5, handleSize);
+    double height = qMin(bounds.height() / 2. - .5, handleSize);
+    double size = qMin(width, height);
+
+    return QRectF(bounds.width() - size, bounds.height() - size, size, size);
+}

utils/themeeditor/graphics/rbmovable.h

@@ -42,15 +42,41 @@ public:
     virtual void paint(QPainter *painter,
                        const QStyleOptionGraphicsItem *option, QWidget *widget);
     virtual void mousePressEvent(QGraphicsSceneMouseEvent *event);
+    virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
     virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
 
+    virtual QRectF boundingRect() const{ return size; }
+
 protected:
     virtual QVariant itemChange(GraphicsItemChange change,
                                 const QVariant &value);
     /* Responsible for updating the parse tree */
     virtual void saveGeometry() = 0;
 
-    bool geomChanged;
+    QRectF size;
+
+private:
+    static const double handleSize;
+
+    QRectF topLeftHandle();
+    QRectF topRightHandle();
+    QRectF bottomLeftHandle();
+    QRectF bottomRightHandle();
+
+    enum{
+        None,
+        TopLeft,
+        TopRight,
+        BottomLeft,
+        BottomRight
+    } dragMode;
+    QPointF dragStartPos;
+    QRectF dragStartSize;
+    QPointF dragStartClick;
+    double dHeightMin;
+    double dHeightMax;
+    double dWidthMin;
+    double dWidthMax;
 
 };
 

utils/themeeditor/graphics/rbprogressbar.cpp

@@ -103,11 +103,6 @@ RBProgressBar::~RBProgressBar()
         delete bitmap;
 }
 
-QRectF RBProgressBar::boundingRect() const
-{
-    return size;
-}
-
 void RBProgressBar::paint(QPainter *painter,
                            const QStyleOptionGraphicsItem *option,
                            QWidget *widget)

utils/themeeditor/graphics/rbprogressbar.h

@@ -40,7 +40,6 @@ public:
                   ParseTreeNode* node, bool pv = 0);
     virtual ~RBProgressBar();
 
-    QRectF boundingRect() const;
     void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
                QWidget *widget);
 
@@ -50,7 +49,6 @@ protected:
 private:
     QPixmap* bitmap;
     QColor color;
-    QRectF size;
     QRectF renderSize;
 
     ParseTreeNode* node;

utils/themeeditor/graphics/rbviewport.cpp

@@ -161,11 +161,6 @@ QPainterPath RBViewport::shape() const
     return retval;
 }
 
-QRectF RBViewport::boundingRect() const
-{
-    return size;
-}
-
 void RBViewport::paint(QPainter *painter,
                        const QStyleOptionGraphicsItem *option, QWidget *widget)
 {

utils/themeeditor/graphics/rbviewport.h

@@ -51,7 +51,6 @@ public:
     virtual ~RBViewport();
 
     QPainterPath shape() const;
-    QRectF boundingRect() const;
     void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
                QWidget *widget);
 
@@ -91,7 +90,6 @@ private:
     void alignCenter();
     void alignRight();
 
-    QRectF size;
     RBFont* font;
     QColor foreground;
     QColor background;