From 0375170befa46f3362b4a4df31ee09771e72d937 Mon Sep 17 00:00:00 2001
From: mzn <mzn@opencascade.com>
Date: Fri, 6 Apr 2007 11:30:14 +0000
Subject: [PATCH] Connect hilight and tooltip for QxGraph_ActiveItem.

---
 src/QxGraph/QxGraph_ActiveItem.h   |  4 ++-
 src/QxGraph/QxGraph_CanvasView.cxx | 57 ++++++++++++++++++++++++++++--
 src/QxGraph/QxGraph_CanvasView.h   | 16 +++++++++
 3 files changed, 73 insertions(+), 4 deletions(-)

diff --git a/src/QxGraph/QxGraph_ActiveItem.h b/src/QxGraph/QxGraph_ActiveItem.h
index 9b2085ae4..bddc1eeb4 100644
--- a/src/QxGraph/QxGraph_ActiveItem.h
+++ b/src/QxGraph/QxGraph_ActiveItem.h
@@ -39,9 +39,11 @@ class QXGRAPH_EXPORT QxGraph_ActiveItem
   virtual void resize(QPoint thePoint) {}
   virtual void afterResizing() {}
 
-  virtual void hilight() = 0;
+  virtual void hilight(const bool toHilight = true) = 0;
   virtual void select() = 0;
   virtual void showPopup() = 0;
+
+  virtual QString getToolTipText(const QPoint& theMousePos, QRect& theRect) const = 0;
 };
 
 #endif
diff --git a/src/QxGraph/QxGraph_CanvasView.cxx b/src/QxGraph/QxGraph_CanvasView.cxx
index 8ceeb499e..7a3df1dbe 100644
--- a/src/QxGraph/QxGraph_CanvasView.cxx
+++ b/src/QxGraph/QxGraph_CanvasView.cxx
@@ -27,7 +27,6 @@
 #include "QxGraph_Def.h"
 
 #include <qwmatrix.h>
-
 #include <math.h>
 
 const char* imageZoomCursor[] = { 
@@ -111,7 +110,8 @@ const char* imageCrossCursor[] = {
 */
 QxGraph_CanvasView::QxGraph_CanvasView(QxGraph_Canvas* theCanvas, QxGraph_ViewWindow* theViewWindow) :
   QCanvasView(theCanvas, theViewWindow),
-  myCurrentItem(0)
+  myCurrentItem(0),
+  myHilightedItem(0)
 {
   printf("Construct QxGraph_CanvasView\n");
   setName("QxGraph_CanvasView");
@@ -287,9 +287,25 @@ void QxGraph_CanvasView::contentsMouseMoveEvent(QMouseEvent* theEvent)
   else
   {
     QCanvasItemList aList = canvas()->collisions(aPoint);
-    // to set resize cursor if needed
+    // to set hilight and resize cursor if needed
+    bool isHilightPerformed = false;
+
     for (QCanvasItemList::Iterator it = aList.begin(); it != aList.end(); ++it) {
       QxGraph_ActiveItem* anActItem = dynamic_cast<QxGraph_ActiveItem*>( *it );
+
+      // hilight
+      if (!isHilightPerformed && anActItem) 
+	{
+	  if (anActItem != myHilightedItem) 
+	    {
+	      anActItem->hilight();
+	      if (myHilightedItem)
+		myHilightedItem->hilight(false);
+	      myHilightedItem = anActItem;
+	      isHilightPerformed = true;
+	    }
+	}
+      
       int aCursorType;
       if ( anActItem && anActItem->isResizable(aPoint,aCursorType) )
       { // set resize cursor
@@ -325,10 +341,21 @@ void QxGraph_CanvasView::contentsMouseMoveEvent(QMouseEvent* theEvent)
 	return;
       }
     }
+    
+    if (!isHilightPerformed && myHilightedItem)
+      {
+	myHilightedItem->hilight(false);
+	myHilightedItem = 0;
+      }
+
     if ( cursor().shape() == Qt::SizeVerCursor || cursor().shape() == Qt::SizeHorCursor
 	 || cursor().shape() == Qt::SizeBDiagCursor || cursor().shape() == Qt::SizeFDiagCursor)
       setCursor(QCursor(Qt::ArrowCursor));
   }
+
+  // show tooltip
+  QxGraph_ToolTip* aToolTip = new QxGraph_ToolTip(this);
+  aToolTip->maybeTip(aPoint);
 }
 
 void QxGraph_CanvasView::contentsMouseReleaseEvent(QMouseEvent* theEvent)
@@ -509,3 +536,27 @@ QxGraph_ViewWindow* QxGraph_CanvasView::getViewWindow() const
 {
   return dynamic_cast<QxGraph_ViewWindow*>( parent() );
 }
+
+/*!
+  Shows tooltip if necessary
+*/
+void QxGraph_ToolTip::maybeTip(const QPoint& theMousePos) {
+  QCanvasItemList aList = ((QCanvasView*)parentWidget())->canvas()->collisions(theMousePos);
+  
+  for (QCanvasItemList::Iterator it = aList.begin(); it != aList.end(); ++it) {
+    QxGraph_ActiveItem* anActItem = dynamic_cast<QxGraph_ActiveItem*>( *it );
+    if (anActItem)
+      {
+	QRect aRect;
+	QString aText = anActItem->getToolTipText(theMousePos, aRect);
+	int avX, avY;
+	QWMatrix aWM = ((QCanvasView*)parentWidget())->worldMatrix();
+	((QCanvasView*)parentWidget())->contentsToViewport((int)(aRect.left()*aWM.m11()), 
+							   (int)(aRect.top()*aWM.m22()), 
+							   avX, avY);
+	QRect aTipRect(avX, avY, (int)(aRect.width()*aWM.m11()), (int)(aRect.height()*aWM.m22()));
+	if (!aText.isEmpty())
+	  tip(aTipRect, aText);
+      }
+  }
+}
diff --git a/src/QxGraph/QxGraph_CanvasView.h b/src/QxGraph/QxGraph_CanvasView.h
index 2acf19f8c..a2e6ba381 100644
--- a/src/QxGraph/QxGraph_CanvasView.h
+++ b/src/QxGraph/QxGraph_CanvasView.h
@@ -28,9 +28,11 @@
 #include <qcanvas.h>
 #include <qcursor.h>
 #include <qtimer.h>
+#include <qtooltip.h>
 
 class QxGraph_Canvas;
 class QxGraph_ViewWindow;
+class QxGraph_ActiveItem;
 
 class QXGRAPH_EXPORT QxGraph_CanvasView : public QCanvasView {
   Q_OBJECT
@@ -76,6 +78,20 @@ class QXGRAPH_EXPORT QxGraph_CanvasView : public QCanvasView {
   QTimer*           myTimer;
   int               myDX;
   int               myDY;
+
+  // for hilight
+  QxGraph_ActiveItem* myHilightedItem;
+};
+
+
+class QxGraph_ToolTip: public QToolTip {
+  
+ public:
+  QxGraph_ToolTip(QWidget* theWidget, QToolTipGroup* theGroup = 0):
+    QToolTip(theWidget, theGroup) {}
+  ~QxGraph_ToolTip() { remove(parentWidget()); }
+    
+  virtual void maybeTip(const QPoint& theMousePos);
 };
 
 #endif
-- 
2.39.2