From 3980f7382b6f5a936cacae984146885d8fb2fb74 Mon Sep 17 00:00:00 2001
From: mkr <mkr@opencascade.com>
Date: Tue, 3 Apr 2007 09:00:07 +0000
Subject: [PATCH] Bloc node presentation in expanded mode (without Gate ports
 and background color). Resize Bloc, move its content.

---
 src/QxGraph/QxGraph_ActiveItem.h   |  8 ++++
 src/QxGraph/QxGraph_CanvasView.cxx | 76 ++++++++++++++++++++++++++++--
 2 files changed, 79 insertions(+), 5 deletions(-)

diff --git a/src/QxGraph/QxGraph_ActiveItem.h b/src/QxGraph/QxGraph_ActiveItem.h
index 5443e189a..9b2085ae4 100644
--- a/src/QxGraph/QxGraph_ActiveItem.h
+++ b/src/QxGraph/QxGraph_ActiveItem.h
@@ -21,6 +21,8 @@
 
 #include "QxGraph.h"
 
+#include <qpoint.h>
+
 class QXGRAPH_EXPORT QxGraph_ActiveItem
 {
  public:
@@ -31,6 +33,12 @@ class QXGRAPH_EXPORT QxGraph_ActiveItem
   virtual void beforeMoving() = 0;
   virtual void afterMoving() = 0;
 
+  virtual bool isResizable(QPoint thePoint, int& theCursorType) { return false; }
+  virtual bool isResizing() { return false; }
+  virtual void beforeResizing(int theCursorType) {}
+  virtual void resize(QPoint thePoint) {}
+  virtual void afterResizing() {}
+
   virtual void hilight() = 0;
   virtual void select() = 0;
   virtual void showPopup() = 0;
diff --git a/src/QxGraph/QxGraph_CanvasView.cxx b/src/QxGraph/QxGraph_CanvasView.cxx
index 6b99e370c..8ceeb499e 100644
--- a/src/QxGraph/QxGraph_CanvasView.cxx
+++ b/src/QxGraph/QxGraph_CanvasView.cxx
@@ -177,7 +177,14 @@ void QxGraph_CanvasView::contentsMousePressEvent(QMouseEvent* theEvent)
     // to move items on canvas view
     for (QCanvasItemList::Iterator it = aList.begin(); it != aList.end(); ++it) {
       QxGraph_ActiveItem* anActItem = dynamic_cast<QxGraph_ActiveItem*>( *it );
-      if ( anActItem && anActItem->isMoveable() )
+      int aCursorType;
+      if ( anActItem && anActItem->isResizable(myPoint,aCursorType) )
+      { // resize itself only active items if it is resizable
+	anActItem->beforeResizing(aCursorType);
+	myCurrentItem = *it;
+	return;
+      }
+      else if ( anActItem && anActItem->isMoveable() )
       { // move itself only active items if it is moveable
 	anActItem->beforeMoving();
 	myCurrentItem = *it;
@@ -240,11 +247,19 @@ void QxGraph_CanvasView::contentsMouseMoveEvent(QMouseEvent* theEvent)
   }
 
   if ( myCurrentItem )
-  { // to move items on canvas view
+  {
+    QxGraph_ActiveItem* anActItem = dynamic_cast<QxGraph_ActiveItem*>( myCurrentItem );
+    if ( anActItem && anActItem->isResizing() )
+    { // to resize items on canvas view
+      anActItem->resize(aPoint);
+      return;
+    }
+
+    // to move items on canvas view
     if ( myCurrentItem->x() && myCurrentItem->y() ) {
       double cx = myCurrentItem->x() - myPoint.x();
       double cy = myCurrentItem->y() - myPoint.y();
-      
+	
       if (aPoint.x()+cx < 0) aPoint.setX(-(int)cx);
       if (aPoint.y()+cy < 0) aPoint.setY(-(int)cy);
     }
@@ -252,7 +267,7 @@ void QxGraph_CanvasView::contentsMouseMoveEvent(QMouseEvent* theEvent)
 			  aPoint.y() - myPoint.y());
     myPoint = aPoint;
     canvas()->update();
-
+    
     // scroll contents if mouse is outside
     QRect r(contentsX(), contentsY(), visibleWidth(), visibleHeight());
     if (!r.contains(theEvent->pos())) {
@@ -269,6 +284,51 @@ void QxGraph_CanvasView::contentsMouseMoveEvent(QMouseEvent* theEvent)
     
     return;
   }
+  else
+  {
+    QCanvasItemList aList = canvas()->collisions(aPoint);
+    // to set resize cursor if needed
+    for (QCanvasItemList::Iterator it = aList.begin(); it != aList.end(); ++it) {
+      QxGraph_ActiveItem* anActItem = dynamic_cast<QxGraph_ActiveItem*>( *it );
+      int aCursorType;
+      if ( anActItem && anActItem->isResizable(aPoint,aCursorType) )
+      { // set resize cursor
+	QCursor resizeCursor;
+	switch (aCursorType)
+	  {
+	  case 1: //left
+	  case 3: //right
+	    resizeCursor = QCursor(Qt::SizeHorCursor);
+	    break;
+	  case 2: //top
+	  case 4: //bottom
+	    resizeCursor = QCursor(Qt::SizeVerCursor); 
+	    break;
+	  case 5: //left-top
+	  case 7: //right-bottom
+	    resizeCursor = QCursor(Qt::SizeFDiagCursor);
+	    break;
+	  case 6: //right-top
+	  case 8: //left-bottom
+	    resizeCursor = QCursor(Qt::SizeBDiagCursor); 
+	    break;
+	  default : 
+	    resizeCursor = QCursor(Qt::ArrowCursor);
+	    break;
+	  }
+	setCursor(resizeCursor);
+	return;
+      }
+      else
+      { // reset old cursor
+	setCursor(QCursor(Qt::ArrowCursor));
+	return;
+      }
+    }
+    if ( cursor().shape() == Qt::SizeVerCursor || cursor().shape() == Qt::SizeHorCursor
+	 || cursor().shape() == Qt::SizeBDiagCursor || cursor().shape() == Qt::SizeFDiagCursor)
+      setCursor(QCursor(Qt::ArrowCursor));
+  }
 }
 
 void QxGraph_CanvasView::contentsMouseReleaseEvent(QMouseEvent* theEvent)
@@ -278,7 +338,13 @@ void QxGraph_CanvasView::contentsMouseReleaseEvent(QMouseEvent* theEvent)
   if (myCurrentItem)
   { // to move items on canvas view    
     QxGraph_ActiveItem* anActItem = dynamic_cast<QxGraph_ActiveItem*>( myCurrentItem );
-    if ( anActItem && anActItem->isMoveable() )
+    if ( anActItem && anActItem->isResizing() )
+    {
+      anActItem->afterResizing();
+      // reset old cursor
+      setCursor(QCursor(Qt::ArrowCursor));
+    }
+    else if ( anActItem && anActItem->isMoveable() )
       anActItem->afterMoving();
   }
   myCurrentItem = 0;
-- 
2.39.2