Ensure there is valid context for DrawRectangle

[wxWidgets.git] / src / generic / dragimgg.cpp

diff --git a/src/generic/dragimgg.cpp b/src/generic/dragimgg.cpp
index ddc94cc7c5fe433212ff49f41ba1795a01a595ed..d861987d170cd3b8b28245facdcfa0bfd319ff9c 100644 (file)
--- a/src/generic/dragimgg.cpp
+++ b/src/generic/dragimgg.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        dragimgg.cpp
+// Name:        src/generic/dragimgg.cpp

 // Purpose:     Generic wxDragImage implementation
 // Author:      Julian Smart
 // Modified by:
 // Purpose:     Generic wxDragImage implementation
 // Author:      Julian Smart
 // Modified by:


@@ -17,39 +17,30 @@
 // headers
 // ----------------------------------------------------------------------------
 
 // headers
 // ----------------------------------------------------------------------------
 

-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-#pragma implementation "dragimgg.h"
-#endif
-

 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__

-#pragma hdrstop
+    #pragma hdrstop

 #endif
 
 #if wxUSE_DRAGIMAGE
 
 #ifndef WX_PRECOMP
 #endif
 
 #if wxUSE_DRAGIMAGE
 
 #ifndef WX_PRECOMP

-#include <stdio.h>
-#include "wx/setup.h"
-#include "wx/window.h"
-#include "wx/frame.h"
-#include "wx/dcclient.h"
-#include "wx/dcscreen.h"
-#include "wx/dcmemory.h"
-#include "wx/settings.h"
+    #include <stdio.h>
+    #include "wx/window.h"
+    #include "wx/frame.h"
+    #include "wx/dcclient.h"
+    #include "wx/dcscreen.h"
+    #include "wx/dcmemory.h"
+    #include "wx/settings.h"
+    #include "wx/intl.h"
+    #include "wx/log.h"
+    #include "wx/image.h"

 #endif
 
 #endif
 

-#include "wx/log.h"
-#include "wx/intl.h"
-

 #define wxUSE_IMAGE_IN_DRAGIMAGE 1
 
 #define wxUSE_IMAGE_IN_DRAGIMAGE 1
 

-#if wxUSE_IMAGE_IN_DRAGIMAGE
-#include "wx/image.h"
-#endif
-

 #include "wx/generic/dragimgg.h"
 
 // ----------------------------------------------------------------------------
 #include "wx/generic/dragimgg.h"
 
 // ----------------------------------------------------------------------------


@@ -78,11 +69,64 @@ void wxGenericDragImage::Init()
 {
     m_isDirty = false;
     m_isShown = false;
 {
     m_isDirty = false;
     m_isShown = false;

-    m_windowDC = (wxDC*) NULL;
-    m_window = (wxWindow*) NULL;
+    m_windowDC = NULL;
+    m_window = NULL;

     m_fullScreen = false;
     m_fullScreen = false;

-    m_pBackingBitmap = (wxBitmap*) NULL;
+#ifdef wxHAS_NATIVE_OVERLAY
+    m_dcOverlay = NULL;
+#else
+    m_pBackingBitmap = NULL;
+#endif
+}
+
+#if WXWIN_COMPATIBILITY_2_6
+wxGenericDragImage::wxGenericDragImage(const wxCursor& cursor, const wxPoint& WXUNUSED(cursorHotspot))
+{
+    Init();
+    Create(cursor);
+}
+
+wxGenericDragImage::wxGenericDragImage(const wxBitmap& image, const wxCursor& cursor, const wxPoint& WXUNUSED(cursorHotspot))
+{
+    Init();
+
+    Create(image, cursor);
+}
+
+wxGenericDragImage::wxGenericDragImage(const wxIcon& image, const wxCursor& cursor, const wxPoint& WXUNUSED(cursorHotspot))
+{
+    Init();
+
+    Create(image, cursor);
+}
+
+wxGenericDragImage::wxGenericDragImage(const wxString& str, const wxCursor& cursor, const wxPoint& WXUNUSED(cursorHotspot))
+{
+    Init();
+
+    Create(str, cursor);
+}
+
+bool wxGenericDragImage::Create(const wxCursor& cursor, const wxPoint& WXUNUSED(cursorHotspot))
+{
+    return Create(cursor);
+}
+
+bool wxGenericDragImage::Create(const wxBitmap& image, const wxCursor& cursor, const wxPoint& WXUNUSED(cursorHotspot))
+{
+    return Create(image, cursor);
+}
+
+bool wxGenericDragImage::Create(const wxIcon& image, const wxCursor& cursor, const wxPoint& WXUNUSED(cursorHotspot))
+{
+    return Create(image, cursor);
+}
+
+bool wxGenericDragImage::Create(const wxString& str, const wxCursor& cursor, const wxPoint& WXUNUSED(cursorHotspot))
+{
+    return Create(str, cursor);

 }
 }

+#endif // WXWIN_COMPATIBILITY_2_6

 
 // Attributes
 ////////////////////////////////////////////////////////////////////////////
 
 // Attributes
 ////////////////////////////////////////////////////////////////////////////


@@ -128,7 +172,7 @@ bool wxGenericDragImage::Create(const wxString& str, const wxCursor& cursor)
 {
     wxFont font(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 
 {
     wxFont font(wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT));
 

-    long w, h;
+    wxCoord w = 0, h = 0;

     wxScreenDC dc;
     dc.SetFont(font);
     dc.GetTextExtent(str, & w, & h);
     wxScreenDC dc;
     dc.SetFont(font);
     dc.GetTextExtent(str, & w, & h);


@@ -143,7 +187,7 @@ bool wxGenericDragImage::Create(const wxString& str, const wxCursor& cursor)
     dc2.SetFont(font);
     dc2.SetBackground(* wxWHITE_BRUSH);
     dc2.Clear();
     dc2.SetFont(font);
     dc2.SetBackground(* wxWHITE_BRUSH);
     dc2.Clear();

-    dc2.SetBackgroundMode(wxTRANSPARENT);
+    dc2.SetBackgroundMode(wxBRUSHSTYLE_TRANSPARENT);

     dc2.SetTextForeground(* wxLIGHT_GREY);
     dc2.DrawText(str, 0, 0);
     dc2.DrawText(str, 1, 0);
     dc2.SetTextForeground(* wxLIGHT_GREY);
     dc2.DrawText(str, 0, 0);
     dc2.DrawText(str, 1, 0);


@@ -158,7 +202,7 @@ bool wxGenericDragImage::Create(const wxString& str, const wxCursor& cursor)
 
     dc2.SelectObject(wxNullBitmap);
 
 
     dc2.SelectObject(wxNullBitmap);
 

-#if wxUSE_IMAGE_IN_DRAGIMAGE
+#if wxUSE_IMAGE_IN_DRAGIMAGE && (!defined(__WXMSW__) || wxUSE_WXDIB)

     // Make the bitmap masked
     wxImage image = bitmap.ConvertToImage();
     image.SetMaskColour(255, 255, 255);
     // Make the bitmap masked
     wxImage image = bitmap.ConvertToImage();
     image.SetMaskColour(255, 255, 255);


@@ -192,7 +236,7 @@ bool wxGenericDragImage::BeginDrag(const wxPoint& hotspot,
                                    bool fullScreen,
                                    wxRect* rect)
 {
                                    bool fullScreen,
                                    wxRect* rect)
 {

-    wxASSERT_MSG( (window != 0), wxT("Window must not be null in BeginDrag."));
+    wxCHECK_MSG( window, false, wxT("Window must not be null in BeginDrag."));

 
     // The image should be offset by this amount
     m_offset = hotspot;
 
     // The image should be offset by this amount
     m_offset = hotspot;


@@ -203,19 +247,16 @@ bool wxGenericDragImage::BeginDrag(const wxPoint& hotspot,
         m_boundingRect = * rect;
 
     m_isDirty = false;
         m_boundingRect = * rect;
 
     m_isDirty = false;

-    m_isDirty = false;
+    m_isShown = false;

 
 

-    if (window)
+    if (m_cursor.IsOk())

     {
     {

-        window->CaptureMouse();
-
-        if (m_cursor.Ok())
-        {
-            m_oldCursor = window->GetCursor();
-            window->SetCursor(m_cursor);
-        }
+        m_oldCursor = window->GetCursor();
+        window->SetCursor(m_cursor);

     }
 
     }
 

+    window->CaptureMouse();
+

     // Make a copy of the window so we can repair damage done as the image is
     // dragged.
 
     // Make a copy of the window so we can repair damage done as the image is
     // dragged.
 


@@ -244,10 +285,12 @@ bool wxGenericDragImage::BeginDrag(const wxPoint& hotspot,
         }
     }
 
         }
     }
 

+#ifndef wxHAS_NATIVE_OVERLAY

     wxBitmap* backing = (m_pBackingBitmap ? m_pBackingBitmap : (wxBitmap*) & m_backingBitmap);
 
     wxBitmap* backing = (m_pBackingBitmap ? m_pBackingBitmap : (wxBitmap*) & m_backingBitmap);
 

-    if (!backing->Ok() || (backing->GetWidth() < clientSize.x || backing->GetHeight() < clientSize.y))
+    if (!backing->IsOk() || (backing->GetWidth() < clientSize.x || backing->GetHeight() < clientSize.y))

         (*backing) = wxBitmap(clientSize.x, clientSize.y);
         (*backing) = wxBitmap(clientSize.x, clientSize.y);

+#endif // !wxHAS_NATIVE_OVERLAY

 
     if (!m_fullScreen)
     {
 
     if (!m_fullScreen)
     {


@@ -281,7 +324,7 @@ bool wxGenericDragImage::BeginDrag(const wxPoint& hotspot, wxWindow* window, wxW
 
     wxSize sz = fullScreenRect->GetSize();
 
 
     wxSize sz = fullScreenRect->GetSize();
 

-    if (fullScreenRect->GetParent() && !fullScreenRect->IsKindOf(CLASSINFO(wxFrame)))
+    if (fullScreenRect->GetParent() && !wxDynamicCast(fullScreenRect, wxFrame))

         fullScreenRect->GetParent()->ClientToScreen(& x, & y);
 
     rect.x = x; rect.y = y;
         fullScreenRect->GetParent()->ClientToScreen(& x, & y);
 
     rect.x = x; rect.y = y;


@@ -302,7 +345,7 @@ bool wxGenericDragImage::EndDrag()
 #endif
             m_window->ReleaseMouse();
 
 #endif
             m_window->ReleaseMouse();
 

-        if (m_cursor.Ok() && m_oldCursor.Ok())
+        if (m_cursor.IsOk() && m_oldCursor.IsOk())

         {
             m_window->SetCursor(m_oldCursor);
         }
         {
             m_window->SetCursor(m_oldCursor);
         }


@@ -310,12 +353,17 @@ bool wxGenericDragImage::EndDrag()
 
     if (m_windowDC)
     {
 
     if (m_windowDC)
     {

+#ifdef wxHAS_NATIVE_OVERLAY
+        m_overlay.Reset();
+#else

         m_windowDC->DestroyClippingRegion();
         m_windowDC->DestroyClippingRegion();

-        delete m_windowDC;
-        m_windowDC = (wxDC*) NULL;
+#endif
+        wxDELETE(m_windowDC);

     }
 
     }
 

+#ifndef wxHAS_NATIVE_OVERLAY

     m_repairBitmap = wxNullBitmap;
     m_repairBitmap = wxNullBitmap;

+#endif

 
     return true;
 }
 
     return true;
 }


@@ -324,7 +372,7 @@ bool wxGenericDragImage::EndDrag()
 // is non-NULL, or in screen coordinates if NULL.
 bool wxGenericDragImage::Move(const wxPoint& pt)
 {
 // is non-NULL, or in screen coordinates if NULL.
 bool wxGenericDragImage::Move(const wxPoint& pt)
 {

-    wxASSERT_MSG( (m_windowDC != (wxDC*) NULL), wxT("No window DC in wxGenericDragImage::Move()") );
+    wxASSERT_MSG( (m_windowDC != NULL), wxT("No window DC in wxGenericDragImage::Move()") );

 
     wxPoint pt2(pt);
     if (m_fullScreen)
 
     wxPoint pt2(pt);
     if (m_fullScreen)


@@ -348,7 +396,7 @@ bool wxGenericDragImage::Move(const wxPoint& pt)
 
 bool wxGenericDragImage::Show()
 {
 
 bool wxGenericDragImage::Show()
 {

-    wxASSERT_MSG( (m_windowDC != (wxDC*) NULL), wxT("No window DC in wxGenericDragImage::Show()") );
+    wxASSERT_MSG( (m_windowDC != NULL), wxT("No window DC in wxGenericDragImage::Show()") );

 
     // Show at the current position
 
 
     // Show at the current position
 


@@ -357,6 +405,7 @@ bool wxGenericDragImage::Show()
         // This is where we restore the backing bitmap, in case
         // something has changed on the window.
 
         // This is where we restore the backing bitmap, in case
         // something has changed on the window.
 

+#ifndef wxHAS_NATIVE_OVERLAY

         wxBitmap* backing = (m_pBackingBitmap ? m_pBackingBitmap : (wxBitmap*) & m_backingBitmap);
         wxMemoryDC memDC;
         memDC.SelectObject(* backing);
         wxBitmap* backing = (m_pBackingBitmap ? m_pBackingBitmap : (wxBitmap*) & m_backingBitmap);
         wxMemoryDC memDC;
         memDC.SelectObject(* backing);


@@ -365,6 +414,7 @@ bool wxGenericDragImage::Show()
 
         //memDC.Blit(0, 0, m_boundingRect.width, m_boundingRect.height, m_windowDC, m_boundingRect.x, m_boundingRect.y);
         memDC.SelectObject(wxNullBitmap);
 
         //memDC.Blit(0, 0, m_boundingRect.width, m_boundingRect.height, m_windowDC, m_boundingRect.x, m_boundingRect.y);
         memDC.SelectObject(wxNullBitmap);

+#endif // !wxHAS_NATIVE_OVERLAY

 
         RedrawImage(m_position - m_offset, m_position - m_offset, false, true);
     }
 
         RedrawImage(m_position - m_offset, m_position - m_offset, false, true);
     }


@@ -384,7 +434,7 @@ bool wxGenericDragImage::UpdateBackingFromWindow(wxDC& windowDC, wxMemoryDC& des
 
 bool wxGenericDragImage::Hide()
 {
 
 bool wxGenericDragImage::Hide()
 {

-    wxASSERT_MSG( (m_windowDC != (wxDC*) NULL), wxT("No window DC in wxGenericDragImage::Hide()") );
+    wxASSERT_MSG( (m_windowDC != NULL), wxT("No window DC in wxGenericDragImage::Hide()") );

 
     // Repair the old position
 
 
     // Repair the old position
 


@@ -400,14 +450,24 @@ bool wxGenericDragImage::Hide()
 }
 
 // More efficient: erase and redraw simultaneously if possible
 }
 
 // More efficient: erase and redraw simultaneously if possible

-bool wxGenericDragImage::RedrawImage(const wxPoint& oldPos, const wxPoint& newPos,
+bool wxGenericDragImage::RedrawImage(const wxPoint& oldPos,
+                                     const wxPoint& newPos,

                                      bool eraseOld, bool drawNew)
 {
     if (!m_windowDC)
         return false;
 
                                      bool eraseOld, bool drawNew)
 {
     if (!m_windowDC)
         return false;
 

+#ifdef wxHAS_NATIVE_OVERLAY
+    wxUnusedVar(oldPos);
+
+    wxDCOverlay dcoverlay( m_overlay, (wxWindowDC*) m_windowDC ) ;
+    if ( eraseOld )
+        dcoverlay.Clear() ;
+    if (drawNew)
+        DoDrawImage(*m_windowDC, newPos);
+#else // !wxHAS_NATIVE_OVERLAY

     wxBitmap* backing = (m_pBackingBitmap ? m_pBackingBitmap : (wxBitmap*) & m_backingBitmap);
     wxBitmap* backing = (m_pBackingBitmap ? m_pBackingBitmap : (wxBitmap*) & m_backingBitmap);

-    if (!backing->Ok())
+    if (!backing->IsOk())

         return false;
 
     wxRect oldRect(GetImageRect(oldPos));
         return false;
 
     wxRect oldRect(GetImageRect(oldPos));


@@ -439,7 +499,7 @@ bool wxGenericDragImage::RedrawImage(const wxPoint& oldPos, const wxPoint& newPo
     // keep reallocating all the time.
     int excess = 50;
 
     // keep reallocating all the time.
     int excess = 50;
 

-    if (!m_repairBitmap.Ok() || (m_repairBitmap.GetWidth() < fullRect.GetWidth() || m_repairBitmap.GetHeight() < fullRect.GetHeight()))
+    if (!m_repairBitmap.IsOk() || (m_repairBitmap.GetWidth() < fullRect.GetWidth() || m_repairBitmap.GetHeight() < fullRect.GetHeight()))

     {
         m_repairBitmap = wxBitmap(fullRect.GetWidth() + excess, fullRect.GetHeight() + excess);
     }
     {
         m_repairBitmap = wxBitmap(fullRect.GetWidth() + excess, fullRect.GetHeight() + excess);
     }


@@ -471,6 +531,7 @@ bool wxGenericDragImage::RedrawImage(const wxPoint& oldPos, const wxPoint& newPo
 
     memDCTemp.SelectObject(wxNullBitmap);
     memDC.SelectObject(wxNullBitmap);
 
     memDCTemp.SelectObject(wxNullBitmap);
     memDC.SelectObject(wxNullBitmap);

+#endif // wxHAS_NATIVE_OVERLAY/!wxHAS_NATIVE_OVERLAY

 
     return true;
 }
 
     return true;
 }


@@ -478,12 +539,12 @@ bool wxGenericDragImage::RedrawImage(const wxPoint& oldPos, const wxPoint& newPo
 // Override this if you are using a virtual image (drawing your own image)
 bool wxGenericDragImage::DoDrawImage(wxDC& dc, const wxPoint& pos) const
 {
 // Override this if you are using a virtual image (drawing your own image)
 bool wxGenericDragImage::DoDrawImage(wxDC& dc, const wxPoint& pos) const
 {

-    if (m_bitmap.Ok())
+    if (m_bitmap.IsOk())

     {
         dc.DrawBitmap(m_bitmap, pos.x, pos.y, (m_bitmap.GetMask() != 0));
         return true;
     }
     {
         dc.DrawBitmap(m_bitmap, pos.x, pos.y, (m_bitmap.GetMask() != 0));
         return true;
     }

-    else if (m_icon.Ok())
+    else if (m_icon.IsOk())

     {
         dc.DrawIcon(m_icon, pos.x, pos.y);
         return true;
     {
         dc.DrawIcon(m_icon, pos.x, pos.y);
         return true;


@@ -495,11 +556,11 @@ bool wxGenericDragImage::DoDrawImage(wxDC& dc, const wxPoint& pos) const
 // Override this if you are using a virtual image (drawing your own image)
 wxRect wxGenericDragImage::GetImageRect(const wxPoint& pos) const
 {
 // Override this if you are using a virtual image (drawing your own image)
 wxRect wxGenericDragImage::GetImageRect(const wxPoint& pos) const
 {

-    if (m_bitmap.Ok())
+    if (m_bitmap.IsOk())

     {
         return wxRect(pos.x, pos.y, m_bitmap.GetWidth(), m_bitmap.GetHeight());
     }
     {
         return wxRect(pos.x, pos.y, m_bitmap.GetWidth(), m_bitmap.GetHeight());
     }

-    else if (m_icon.Ok())
+    else if (m_icon.IsOk())

     {
         return wxRect(pos.x, pos.y, m_icon.GetWidth(), m_icon.GetHeight());
     }
     {
         return wxRect(pos.x, pos.y, m_icon.GetWidth(), m_icon.GetHeight());
     }