Don't complain under MicroWindows if a wxDC's HDC is NULL - it happens

[wxWidgets.git] / src / common / gdicmn.cpp

diff --git a/src/common/gdicmn.cpp b/src/common/gdicmn.cpp
index a9481d6f49b51fd8269cecfcc98153f916ae6353..239278c28ee1ab66cf59b55a5234f74642fb7767 100644 (file)
--- a/src/common/gdicmn.cpp
+++ b/src/common/gdicmn.cpp
@@ -113,6 +113,29 @@ wxRect wxRect::operator + (const wxRect& rect) const
     return wxRect(x1, y1, x2-x1, y2-y1);
 }
 
+wxRect& wxRect::Inflate(wxCoord dx, wxCoord dy)
+{
+    x -= dx;
+    y -= dy;
+    width += 2*dx;
+    height += 2*dy;
+
+    // check that we didn't make the rectangle invalid by accident (you almost
+    // never want to have negative coords and never want negative size)
+    if ( x < 0 )
+        x = 0;
+    if ( y < 0 )
+        y = 0;
+
+    // what else can we do?
+    if ( width < 0 )
+        width = 0;
+    if ( height < 0 )
+        height = 0;
+
+    return *this;
+}
+
 bool wxRect::Inside(int cx, int cy) const
 {
     return ( (cx >= x) && (cy >= y)
@@ -121,6 +144,40 @@ bool wxRect::Inside(int cx, int cy) const
           );
 }
 
+wxRect& wxRect::Intersect(const wxRect& rect)
+{
+    int x2 = GetRight(),
+        y2 = GetBottom();
+
+    if ( x < rect.x )
+        x = rect.x;
+    if ( y < rect.y )
+        y = rect.y;
+    if ( x2 > rect.GetRight() )
+        x2 = rect.GetRight();
+    if ( y2 > rect.GetBottom() )
+        y2 = rect.GetBottom();
+
+    width = x2 - x + 1;
+    height = y2 - y + 1;
+
+    if ( width <= 0 || height <= 0 )
+    {
+        width =
+        height = 0;
+    }
+
+    return *this;
+}
+
+bool wxRect::Intersects(const wxRect& rect) const
+{
+    wxRect r = Intersect(rect);
+
+    // if there is no intersection, both width and height are 0
+    return r.width != 0;
+}
+
 wxColourDatabase::wxColourDatabase (int type) : wxList (type)
 {
 }
@@ -283,6 +340,9 @@ wxColour *wxColourDatabase::FindColour(const wxString& colour)
 #ifdef __WXPM__
   return NULL;
 #endif
+#ifdef __WXMGL__
+  return NULL;
+#endif
 
 // TODO for other implementations. This should really go into
 // platform-specific directories.
@@ -520,27 +580,35 @@ void wxPenList::RemovePen (wxPen * pen)
 
 wxPen *wxPenList::FindOrCreatePen (const wxColour& colour, int width, int style)
 {
-  for (wxNode * node = First (); node; node = node->Next ())
+    for (wxNode * node = First (); node; node = node->Next ())
     {
-      wxPen *each_pen = (wxPen *) node->Data ();
-      if (each_pen &&
-          each_pen->GetVisible() &&
-          each_pen->GetWidth () == width &&
-          each_pen->GetStyle () == style &&
-          each_pen->GetColour ().Red () == colour.Red () &&
-          each_pen->GetColour ().Green () == colour.Green () &&
-          each_pen->GetColour ().Blue () == colour.Blue ())
-        return each_pen;
+        wxPen *each_pen = (wxPen *) node->Data ();
+        if (each_pen &&
+                each_pen->GetVisible() &&
+                each_pen->GetWidth () == width &&
+                each_pen->GetStyle () == style &&
+                each_pen->GetColour ().Red () == colour.Red () &&
+                each_pen->GetColour ().Green () == colour.Green () &&
+                each_pen->GetColour ().Blue () == colour.Blue ())
+            return each_pen;
+    }
+
+    wxPen *pen = new wxPen (colour, width, style);
+    if ( !pen->Ok() )
+    {
+        // don't save the invalid pens in the list
+        delete pen;
+
+        return NULL;
     }
-  wxPen *pen = new wxPen (colour, width, style);
 
-  // Yes, we can return a pointer to this in a later FindOrCreatePen call,
-  // because we created it within FindOrCreatePen. Safeguards against
-  // returning a pointer to an automatic variable and hanging on to it
-  // (dangling pointer).
-  pen->SetVisible(TRUE);
+    // Yes, we can return a pointer to this in a later FindOrCreatePen call,
+    // because we created it within FindOrCreatePen. Safeguards against
+    // returning a pointer to an automatic variable and hanging on to it
+    // (dangling pointer).
+    pen->SetVisible(TRUE);
 
-  return pen;
+    return pen;
 }
 
 wxBrushList::~wxBrushList ()
@@ -563,27 +631,35 @@ void wxBrushList::AddBrush (wxBrush * brush)
 
 wxBrush *wxBrushList::FindOrCreateBrush (const wxColour& colour, int style)
 {
-  for (wxNode * node = First (); node; node = node->Next ())
+    for (wxNode * node = First (); node; node = node->Next ())
     {
-      wxBrush *each_brush = (wxBrush *) node->Data ();
-      if (each_brush &&
-          each_brush->GetVisible() &&
-          each_brush->GetStyle () == style &&
-          each_brush->GetColour ().Red () == colour.Red () &&
-          each_brush->GetColour ().Green () == colour.Green () &&
-          each_brush->GetColour ().Blue () == colour.Blue ())
-        return each_brush;
+        wxBrush *each_brush = (wxBrush *) node->Data ();
+        if (each_brush &&
+                each_brush->GetVisible() &&
+                each_brush->GetStyle () == style &&
+                each_brush->GetColour ().Red () == colour.Red () &&
+                each_brush->GetColour ().Green () == colour.Green () &&
+                each_brush->GetColour ().Blue () == colour.Blue ())
+            return each_brush;
     }
 
-  // Yes, we can return a pointer to this in a later FindOrCreateBrush call,
-  // because we created it within FindOrCreateBrush. Safeguards against
-  // returning a pointer to an automatic variable and hanging on to it
-  // (dangling pointer).
-  wxBrush *brush = new wxBrush (colour, style);
+    wxBrush *brush = new wxBrush (colour, style);
 
-  brush->SetVisible(TRUE);
+    if ( !brush->Ok() )
+    {
+        // don't put the brushes we failed to create into the list
+        delete brush;
+
+        return NULL;
+    }
 
-  return brush;
+    brush->SetVisible(TRUE);
+
+    // Yes, we can return a pointer to this in a later FindOrCreateBrush call,
+    // because we created it within FindOrCreateBrush. Safeguards against
+    // returning a pointer to an automatic variable and hanging on to it
+    // (dangling pointer).
+    return brush;
 }
 
 void wxBrushList::RemoveBrush (wxBrush * brush)
@@ -707,6 +783,13 @@ wxSize wxGetDisplaySize()
     return wxSize(x, y);
 }
 
+wxRect wxGetClientDisplayRect()
+{
+    int x, y, width, height;
+    wxClientDisplayRect(&x, &y, &width, &height);  // call plat-specific version
+    return wxRect(x, y, width, height);
+}
+
 wxSize wxGetDisplaySizeMM()
 {
     int x, y;