wxCocoa: Basic support for font underlining:

* Make wxWindow::SetFont call wxWindowBase::SetFont.
* Make wxDC::SetFont store the font in existing m_font.
* Make wxFont::GetUnderlined return the m_underlined flag.
* Implement underlining in wxDC::DoDrawText
Copyright 2007, Software 2000 Ltd.



git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@47598 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/cocoa/dc.h

@@ -83,7 +83,7 @@ public:
     virtual void StartPage(void) {};
     virtual void EndPage(void) {};
 
-    virtual void SetFont(const wxFont& font) {}
+    virtual void SetFont(const wxFont& font);
     virtual void SetPen(const wxPen& pen);
     virtual void SetBrush(const wxBrush& brush);
     virtual void SetBackground(const wxBrush& brush);

src/cocoa/dc.mm

@@ -315,11 +315,25 @@ void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
     NSPoint layoutLocation = [sm_cocoaNSLayoutManager locationForGlyphAtIndex:0];
     layoutLocation.x = 0.0;
     layoutLocation.y *= -1.0;
+
+    // Save the location as is for underlining
+    NSPoint underlineLocation = layoutLocation;
+
+    // Offset the location by the baseline for drawing the glyphs.
     layoutLocation.y += [[sm_cocoaNSLayoutManager typesetter] baselineOffsetInLayoutManager:sm_cocoaNSLayoutManager glyphIndex:0];
+
     if(m_backgroundMode==wxSOLID)
         [sm_cocoaNSLayoutManager drawBackgroundForGlyphRange:glyphRange  atPoint:NSZeroPoint];
     [sm_cocoaNSLayoutManager drawGlyphsForGlyphRange:glyphRange  atPoint:layoutLocation];
 
+    int underlineStyle = GetFont().GetUnderlined() ? NSUnderlineStyleSingle : NSUnderlineStyleNone;
+    NSRange lineGlyphRange;
+    NSRect lineRect = [sm_cocoaNSLayoutManager lineFragmentRectForGlyphAtIndex:0 effectiveRange:&lineGlyphRange];
+
+    [sm_cocoaNSLayoutManager underlineGlyphRange:glyphRange underlineType:underlineStyle
+        lineFragmentRect:lineRect lineFragmentGlyphRange:lineGlyphRange
+        containerOrigin:underlineLocation];
+
     [context restoreGraphicsState];
 }
 
@@ -386,6 +400,11 @@ void wxDC::DoDrawArc(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord xc,
 {
 }
 
+void wxDC::SetFont(const wxFont& font)
+{
+    m_font = font;
+}
+
 void wxDC::SetPen(const wxPen& pen)
 {
     m_pen = pen;

src/cocoa/font.cpp

@@ -60,7 +60,10 @@ int wxFont::GetPointSize() const
 
 bool wxFont::GetUnderlined() const
 {
-    return false;
+    if(M_FONTDATA)
+        return M_FONTDATA->m_underlined;
+    else
+        return false;
 }
 
 int wxFont::GetStyle() const

src/cocoa/window.mm

@@ -1031,8 +1031,8 @@ void wxWindow::DoSetVirtualSize( int x, int y )
 
 bool wxWindow::SetFont(const wxFont& font)
 {
-    // TODO
-    return true;
+    // FIXME: We may need to handle wx font inheritance.
+    return wxWindowBase::SetFont(font);
 }
 
 #if 0 // these are used when debugging the algorithm.