SANKORE-475

Improve the rendering of the magnifier

src/board/UBBoardController.cpp

@@ -664,6 +664,7 @@ void UBBoardController::zoom(const qreal ratio, QPointF scenePoint)
     UBApplication::applicationController->adjustDisplayView();
 
     emit controlViewportChanged();
+    mActiveScene->setBackgroundZoomFactor(mControlView->transform().m11());
 }
 
 
@@ -1163,7 +1164,7 @@ void UBBoardController::setActiveDocumentScene(UBDocumentProxy* pDocumentProxy,
 
         mControlView->setScene(mActiveScene);
         mDisplayView->setScene(mActiveScene);
-
+        mActiveScene->setBackgroundZoomFactor(mControlView->transform().m11());
         pDocumentProxy->setDefaultDocumentSize(mActiveScene->nominalSize());
         updatePageSizeState();
 
@@ -1564,7 +1565,7 @@ void UBBoardController::updateSystemScaleFactor()
     mControlView->setTransform(scalingTransform);
     mControlView->horizontalScrollBar()->setValue(viewState.horizontalPosition);
     mControlView->verticalScrollBar()->setValue(viewState.verticalPostition);
-}
+    mActiveScene->setBackgroundZoomFactor(mControlView->transform().m11());}
 
 
 void UBBoardController::setWidePageSize(bool checked)

src/desktop/UBDesktopAnnotationController.cpp

@@ -88,6 +88,7 @@ UBDesktopAnnotationController::UBDesktopAnnotationController(QObject *parent)
 
     mTransparentDrawingScene = new UBGraphicsScene(0);
     mTransparentDrawingView->setScene(mTransparentDrawingScene);
+    mTransparentDrawingScene->setDrawingMode(true);
 
 //    mRightPalette = UBApplication::boardController->paletteManager()->createDesktopRightPalette(mTransparentDrawingView);
     //mRightPalette = new UBRightPalette(mTransparentDrawingView);

src/domain/UBGraphicsScene.cpp

@@ -135,6 +135,7 @@ UBGraphicsScene::UBGraphicsScene(UBDocumentProxy* parent)
     , enableUndoRedoStack(true)
     , magniferControlViewWidget(0)
     , magniferDisplayViewWidget(0)
+    , mIsDesktopMode(false)
 
 {
 
@@ -160,8 +161,6 @@ UBGraphicsScene::UBGraphicsScene(UBDocumentProxy* parent)
 
 UBGraphicsScene::~UBGraphicsScene()
 {
-    DisposeMagnifierQWidgets();
-
     if (mCurrentStroke)
         if (mCurrentStroke->polygons().empty())
             delete mCurrentStroke;
@@ -711,6 +710,15 @@ void UBGraphicsScene::setBackground(bool pIsDark, bool pIsCrossed)
     }
 }
 
+void UBGraphicsScene::setBackgroundZoomFactor(qreal zoom)
+{
+    mZoomFactor = zoom;
+}
+
+void UBGraphicsScene::setDrawingMode(bool bModeDesktop)
+{
+    mIsDesktopMode = bModeDesktop;
+}
 
 void UBGraphicsScene::recolorAllItems()
 {
@@ -1854,6 +1862,58 @@ void UBGraphicsScene::drawItems (QPainter * painter, int numItems,
     }
 }
 
+void UBGraphicsScene::drawBackground(QPainter *painter, const QRectF &rect)
+{
+    if (mIsDesktopMode)
+    {
+        QGraphicsScene::drawBackground (painter, rect);
+        return;
+    }
+    bool darkBackground = isDarkBackground ();
+
+    if (darkBackground)
+    {
+      painter->fillRect (rect, QBrush (QColor (Qt::black)));
+    }
+    else
+    {
+      painter->fillRect (rect, QBrush (QColor (Qt::white)));
+    }
+
+    if (mZoomFactor > 0.5)
+    {
+        QColor bgCrossColor;
+
+        if (darkBackground)
+            bgCrossColor = UBSettings::crossDarkBackground;
+        else
+            bgCrossColor = UBSettings::crossLightBackground;
+        if (mZoomFactor < 1.0)
+        {
+            int alpha = 255 * mZoomFactor / 2;
+            bgCrossColor.setAlpha (alpha); // fade the crossing on small zooms
+        }
+
+        painter->setPen (bgCrossColor);
+
+        if (isCrossedBackground())
+        {
+            qreal firstY = ((int) (rect.y () / UBSettings::crossSize)) * UBSettings::crossSize;
+
+            for (qreal yPos = firstY; yPos < rect.y () + rect.height (); yPos += UBSettings::crossSize)
+            {
+                painter->drawLine (rect.x (), yPos, rect.x () + rect.width (), yPos);
+            }
+
+            qreal firstX = ((int) (rect.x () / UBSettings::crossSize)) * UBSettings::crossSize;
+
+            for (qreal xPos = firstX; xPos < rect.x () + rect.width (); xPos += UBSettings::crossSize)
+            {
+                painter->drawLine (xPos, rect.y (), xPos, rect.y () + rect.height ());
+            }
+        }
+    }
+}
 
 void UBGraphicsScene::keyReleaseEvent(QKeyEvent * keyEvent)
 {

src/domain/UBGraphicsScene.h

@@ -288,7 +288,8 @@ class UBGraphicsScene: public UBCoreGraphicsScene, public UBItem
         void hideEraser();
 
         void setBackground(bool pIsDark, bool pIsCrossed);
-
+        void setBackgroundZoomFactor(qreal zoom);
+        void setDrawingMode(bool bModeDesktop);
         void deselectAllItems();
 
         UBGraphicsPixmapItem* addPixmap(const QPixmap& pPixmap, const QPointF& pPos = QPointF(0,0), qreal scaleFactor = 1.0, bool pUseAnimation = false);
@@ -331,6 +332,8 @@ class UBGraphicsScene: public UBCoreGraphicsScene, public UBItem
 
         QGraphicsItem* rootItem(QGraphicsItem* item) const;
 
+        virtual void drawBackground(QPainter *painter, const QRectF &rect);
+
     private:
         void setDocumentUpdated();
         void createEraiser();
@@ -348,6 +351,8 @@ class UBGraphicsScene: public UBCoreGraphicsScene, public UBItem
 
         bool mDarkBackground;
         bool mCrossedBackground;
+        bool mIsDesktopMode;
+        qreal mZoomFactor;
 
         bool mIsModified;
 

src/gui/UBMagnifer.cpp

@@ -19,6 +19,7 @@
 #include "core/UBApplication.h"
 #include "board/UBBoardController.h"
 #include "domain/UBGraphicsScene.h"
+#include "board/UBBoardView.h"
 
 #include "core/memcheck.h"
 
@@ -27,7 +28,6 @@ UBMagnifier::UBMagnifier(QWidget *parent, bool isInteractive)
     : QWidget(parent, parent ? Qt::Widget : Qt::Tool | (Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint | Qt::X11BypassWindowManagerHint))
     , mShouldMoveWidget(false)
     , mShouldResizeWidget(false)
-    , inTimer(false)
     , borderPen(Qt::darkGray)
     , gView(0)
     , mView(0)
@@ -70,16 +70,11 @@ UBMagnifier::UBMagnifier(QWidget *parent, bool isInteractive)
 #endif
     }
 
+    connect(&mRefreshTimer, SIGNAL(timeout()), this, SLOT(slot_refresh()));
 }
 
 UBMagnifier::~UBMagnifier()
 {
-    if (timerUpdate != 0)
-    {
-        killTimer(timerUpdate);
-        timerUpdate = 0;
-    }
-
     if(sClosePixmap)
     {
         delete sClosePixmap;
@@ -285,12 +280,8 @@ void UBMagnifier::mouseReleaseEvent(QMouseEvent * event)
 
 }
 
-void UBMagnifier::timerEvent(QTimerEvent *e)
+void UBMagnifier::slot_refresh()
 {
-    if(inTimer) return;
-    if (e->timerId() == timerUpdate)
-    {
-        inTimer = true;
     if(!(updPointGrab.isNull())) 
         grabPoint(updPointGrab);
 
@@ -307,28 +298,37 @@ void UBMagnifier::timerEvent(QTimerEvent *e)
             isCusrsorAlreadyStored = false;
             setCursor(mOldCursor);
         }
-
-        }
-
-        inTimer = false;
     }
 }
 
 void UBMagnifier::grabPoint()
 {
+    QMatrix transM = UBApplication::boardController->controlView()->matrix();
     QPointF itemPos = gView->mapFromGlobal(updPointGrab);
 
-    qreal zWidth = size().width() / params.zoom;
+    qreal zWidth = width() / (params.zoom * transM.m11());
     qreal zWidthHalf = zWidth / 2;
-    qreal zHeight = size().height() / params.zoom;
+    qreal zHeight = height() / (params.zoom * transM.m22());
     qreal zHeightHalf = zHeight / 2;
     
-    int x = itemPos.x() - zWidthHalf;
-    int y = itemPos.y() - zHeightHalf;
 
-    QPixmap newPixMap(QSize(zWidth,zHeight));
+    QPointF pfScLtF(UBApplication::boardController->controlView()->mapToScene(QPoint(itemPos.x(), itemPos.y())));
-    ((QWidget*)gView)->render(&newPixMap, QPoint(0, 0), QRegion(x, y, zWidth, zHeight));
+   
-    UBApplication::boardController->activeScene()->update();
+    
+    QRect magnifierRect = rect();
+
+    float x = pfScLtF.x() - zWidthHalf;
+    float y = pfScLtF.y() - zHeightHalf;
+
+    QPointF leftTop(x,y);
+    QPointF rightBottom(x + zWidth, y + zHeight);  
+    QRectF srcRect(leftTop, rightBottom);
+
+    QPixmap newPixMap(QSize(width(), height()));
+    QPainter painter(&newPixMap);
+
+    UBApplication::boardController->activeScene()->render(&painter, QRectF(0,0,width(),height()), srcRect);
+    painter.end();
     
     pMap.fill(Qt::transparent);
     pMap = newPixMap.scaled(QSize(width(), height()));
@@ -339,28 +339,43 @@ void UBMagnifier::grabPoint()
 
 void UBMagnifier::grabPoint(const QPoint &pGrab)
 {
+    QMatrix transM = UBApplication::boardController->controlView()->matrix();
     updPointGrab = pGrab;
     QPointF itemPos = gView->mapFromGlobal(pGrab);
 
-    qreal zWidth = size().width() / params.zoom;
+    qreal zWidth = width() / (params.zoom * transM.m11());
     qreal zWidthHalf = zWidth / 2;
-    qreal zHeight = size().height() / params.zoom;
+    qreal zHeight = height() / (params.zoom * transM.m22());
     qreal zHeightHalf = zHeight / 2;
     
-    int x = itemPos.x() - zWidthHalf;
-    int y = itemPos.y() - zHeightHalf;
 
-    QPixmap newPixMap(QSize(zWidth,zHeight));
+    QPointF pfScLtF(UBApplication::boardController->controlView()->mapToScene(QPoint(itemPos.x(), itemPos.y())));
-    ((QWidget*)gView)->render(&newPixMap, QPoint(0, 0), QRegion(x, y, zWidth, zHeight));
-    UBApplication::boardController->activeScene()->update();
    
-    pMap.fill(Qt::transparent);
+    
-    pMap = newPixMap.scaled(QSize(width(), height()));
+    QRect magnifierRect = rect();
+
+    float x = pfScLtF.x() - zWidthHalf;
+    float y = pfScLtF.y() - zHeightHalf;
+
+    QPointF leftTop(x,y);
+    QPointF rightBottom(x + zWidth, y + zHeight);  
+    QRectF srcRect(leftTop, rightBottom);
+
+    QPixmap newPixMap(QSize(width(), height()));
+    QPainter painter(&newPixMap);
+
+    UBApplication::boardController->activeScene()->render(&painter, QRectF(0,0,width(),height()), srcRect);   
+    painter.end();
+    
+   // pMap.fill(Qt::transparent);
+    pMap = newPixMap;
     pMap.setMask(bmpMask);
 
     update();
 }
 
+
+
 // from global
 void UBMagnifier::grabNMove(const QPoint &pGrab, const QPoint &pMove, bool needGrab, bool needMove)
 {
@@ -380,9 +395,8 @@ void UBMagnifier::grabNMove(const QPoint &pGrab, const QPoint &pMove, bool needG
 
 void UBMagnifier::setGrabView(QWidget *view)
 {   
-    if (timerUpdate != 0)
-        killTimer(timerUpdate);
     gView = view;
-    timerUpdate = startTimer(200);
+    mRefreshTimer.setInterval(40);
+    mRefreshTimer.start();
 }
 

src/gui/UBMagnifer.h

@@ -54,9 +54,11 @@ signals:
     void magnifierZoomOut_Signal();
     void magnifierResized_Signal(qreal newPercentSize);
     
+public slots:
+    void slot_refresh();
+
 protected:
     void paintEvent(QPaintEvent *);
-    void timerEvent(QTimerEvent *);
 
     virtual void mousePressEvent ( QMouseEvent * event );
     virtual void mouseMoveEvent ( QMouseEvent * event );
@@ -78,10 +80,9 @@ protected:
     QCursor mResizeCursor;
 
 private:
-    bool inTimer;
+    QTimer mRefreshTimer;
     bool m_isInteractive;
 
-    int timerUpdate;
     QPoint updPointGrab;
     QPoint updPointMove;