added more files (unchanged) from wxUniv branch

[wxWidgets.git] / samples / dragimag / dragimag.cpp

diff --git a/samples/dragimag/dragimag.cpp b/samples/dragimag/dragimag.cpp
index 208dae675ed615ed9d0a650514e04b23297e7875..e803877a1e3c0f2df17d1c9535c139e12837b24a 100644 (file)
--- a/samples/dragimag/dragimag.cpp
+++ b/samples/dragimag/dragimag.cpp
@@ -131,10 +131,8 @@ void MyCanvas::OnMouseEvent(wxMouseEvent& event)
         if (!m_draggedShape || !m_dragImage)
             return;
 
-        wxPoint newPos(m_draggedShape->GetPosition().x + (event.GetPosition().x - m_dragStartPos.x),
-                           m_draggedShape->GetPosition().y + (event.GetPosition().y - m_dragStartPos.y));
-
-        m_draggedShape->SetPosition(newPos);
+        m_draggedShape->SetPosition(m_draggedShape->GetPosition()
+                                    + event.GetPosition() - m_dragStartPos);
 
         m_dragImage->Hide();
         m_dragImage->EndDrag();
@@ -165,9 +163,6 @@ void MyCanvas::OnMouseEvent(wxMouseEvent& event)
             if (dx <= tolerance && dy <= tolerance)
                 return;
 
-            wxPoint newPos(m_draggedShape->GetPosition().x + (event.GetPosition().x - m_dragStartPos.x),
-                           m_draggedShape->GetPosition().y + (event.GetPosition().y - m_dragStartPos.y));
-
             // Start the drag.
             m_dragMode = TEST_DRAG_DRAGGING;
 
@@ -184,58 +179,51 @@ void MyCanvas::OnMouseEvent(wxMouseEvent& event)
             {
                 case SHAPE_DRAG_BITMAP:
                 {
-                    wxPoint hotSpot(event.GetPosition().x - newPos.x, event.GetPosition().y - newPos.y);
-                    m_dragImage = new wxDragImage(m_draggedShape->GetBitmap(), wxCursor(wxCURSOR_HAND), hotSpot);
+                    m_dragImage = new wxDragImage(m_draggedShape->GetBitmap(), wxCursor(wxCURSOR_HAND));
                     break;
                 }
                 case SHAPE_DRAG_TEXT:
                 {
-                    wxPoint hotSpot(event.GetPosition().x - newPos.x, event.GetPosition().y - newPos.y);
-                    m_dragImage = new wxDragImage("Dragging some test text", wxCursor(wxCURSOR_HAND), hotSpot);
+                    m_dragImage = new wxDragImage("Dragging some test text", wxCursor(wxCURSOR_HAND));
                     break;
                 }
                 case SHAPE_DRAG_ICON:
                 {
-                    wxPoint hotSpot(event.GetPosition().x - newPos.x, event.GetPosition().y - newPos.y);
-
                     // Can anyone explain why this test is necessary,
                     // to prevent a gcc error?
 #ifdef __WXMOTIF__
-                   wxIcon icon(dragicon_xpm);
+                    wxIcon icon(dragicon_xpm);
 #else
-                   wxIcon icon(wxICON(dragicon));
+                    wxIcon icon(wxICON(dragicon));
 #endif
-
-                    m_dragImage = new wxDragImage(icon, wxCursor(wxCURSOR_HAND), hotSpot);
+                    
+                    m_dragImage = new wxDragImage(icon, wxCursor(wxCURSOR_HAND));
                     break;
                 }
             }
 
-            bool fullScreen = FALSE;
-            if (wxGetApp().GetUseScreen())
-            {
-                newPos = ClientToScreen(newPos);
-                fullScreen = TRUE;
-            }
+            bool fullScreen = wxGetApp().GetUseScreen();
 
-            bool retValue;
+            // The offset between the top-left of the shape image and the current shape position
+            wxPoint beginDragHotSpot = m_dragStartPos - m_draggedShape->GetPosition();
+            
+            // Now we do this inside the implementation: always assume
+            // coordinates relative to the capture window (client coordinates)
 
-            if (fullScreen)
-                // This line uses the whole screen...
-                retValue = m_dragImage->BeginDrag(wxPoint(0, 0), this, TRUE);
-                // while this line restricts dragging to the parent frame.
-                // retValue = m_dragImage->BeginDrag(wxPoint(0, 0), this, GetParent());
-            else
-                retValue = m_dragImage->BeginDrag(wxPoint(0, 0), this);
-
-            if (!retValue)
+            //if (fullScreen)
+            //    beginDragHotSpot -= ClientToScreen(wxPoint(0, 0));
+            
+            if (!m_dragImage->BeginDrag(beginDragHotSpot, this, fullScreen))
             {
                 delete m_dragImage;
                 m_dragImage = (wxDragImage*) NULL;
                 m_dragMode = TEST_DRAG_NONE;
+                
+            } else
+            {
+                m_dragImage->Move(event.GetPosition());
+                m_dragImage->Show();
             }
-            m_dragImage->Move(newPos);
-            m_dragImage->Show();
         }
         else if (m_dragMode == TEST_DRAG_DRAGGING)
         {
@@ -272,16 +260,8 @@ void MyCanvas::OnMouseEvent(wxMouseEvent& event)
                 m_currentlyHighlighted->Draw(clientDC, wxINVERT);
             }
 
-            wxPoint newPos(m_draggedShape->GetPosition().x + (event.GetPosition().x - m_dragStartPos.x),
-                           m_draggedShape->GetPosition().y + (event.GetPosition().y - m_dragStartPos.y));
-
-            if (wxGetApp().GetUseScreen())
-            {
-                newPos = ClientToScreen(newPos);
-            }
-
             // Move and show the image again
-            m_dragImage->Move(newPos);
+            m_dragImage->Move(event.GetPosition());
 
             if (mustUnhighlightOld || mustHighlightNew)
                  m_dragImage->Show();