X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/7beba2fc73283f5b750227459da57e66bcd475f5..07e829dc26b8b9d46a512c19290a7436c8f0e0e9:/src/gtk/dcclient.cpp

diff --git a/src/gtk/dcclient.cpp b/src/gtk/dcclient.cpp
index 722c2a664e..9248836046 100644
--- a/src/gtk/dcclient.cpp
+++ b/src/gtk/dcclient.cpp
@@ -15,10 +15,10 @@
 #include "wx/dcmemory.h"
 #include "wx/image.h"
 #include "wx/gtk/win_gtk.h"
-#include <math.h>               // for floating-point functions
 
-#include "gdk/gdk.h"
-#include "gtk/gtk.h"
+#include <math.h>               // for floating-point functions
+#include <gdk/gdk.h>
+#include <gtk/gtk.h>
 
 //-----------------------------------------------------------------------------
 // local data
@@ -39,7 +39,16 @@ static GdkPixmap **hatch_bitmap = (GdkPixmap **) NULL;
 // constants
 //-----------------------------------------------------------------------------
 
-#define RAD2DEG 57.2957795131
+const double RAD2DEG  = 180.0 / M_PI;
+
+// ----------------------------------------------------------------------------
+// private functions
+// ----------------------------------------------------------------------------
+
+static inline double dmax(double a, double b) { return a > b ? a : b; }
+static inline double dmin(double a, double b) { return a < b ? a : b; }
+
+static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
 
 //-----------------------------------------------------------------------------
 // temporary implementation of the missing GDK function
@@ -795,6 +804,119 @@ void wxWindowDC::DoDrawText( const wxString &text, wxCoord x, wxCoord y )
     CalcBoundingBox (x, y);
 }
 
+void wxWindowDC::DoDrawRotatedText( const wxString &text, wxCoord x, wxCoord y, double angle )
+{
+    if (angle == 0.0)
+    {
+        DrawText(text, x, y);
+        return;
+    }
+
+    wxCHECK_RET( Ok(), wxT("invalid window dc") );
+
+    if (!m_window) return;
+
+    GdkFont *font = m_font.GetInternalFont( m_scaleY );
+
+    wxCHECK_RET( font, wxT("invalid font") );
+
+    // the size of the text
+    wxCoord w = gdk_string_width( font, text.mbc_str() );
+    wxCoord h = font->ascent + font->descent;
+
+    // draw the string normally
+    wxBitmap src(w, h);
+    wxMemoryDC dc;
+    dc.SelectObject(src);
+    dc.SetFont(GetFont());
+    dc.SetBackground(*wxWHITE_BRUSH);
+    dc.SetBrush(*wxBLACK_BRUSH);
+    dc.Clear();
+    dc.DrawText(text, 0, 0);
+    dc.SetFont(wxNullFont);
+    dc.SelectObject(wxNullBitmap);
+
+    // Calculate the size of the rotated bounding box.
+    double rad = DegToRad(angle);
+    double dx = cos(rad),
+           dy = sin(rad);
+
+    // the rectngle vertices are counted clockwise with the first one being at
+    // (0, 0) (or, rather, at (x, y))
+    double x2 = w*dx,
+           y2 = -w*dy;      // y axis points to the bottom, hence minus
+    double x4 = h*dy,
+           y4 = h*dx;
+    double x3 = x4 + x2,
+           y3 = y4 + y2;
+
+    // calc max and min 
+    wxCoord maxX = (wxCoord)(dmax(x2, dmax(x3, x4)) + 0.5),
+            maxY = (wxCoord)(dmax(y2, dmax(y3, y4)) + 0.5),
+            minX = (wxCoord)(dmin(x2, dmin(x3, x4)) - 0.5),
+            minY = (wxCoord)(dmin(y2, dmin(y3, y4)) - 0.5);
+
+    // prepare to blit-with-rotate the bitmap to the DC
+    wxImage image(src);
+
+    GdkColor *colText = m_textForegroundColour.GetColor(),
+             *colBack = m_textBackgroundColour.GetColor();
+    
+    bool textColSet = TRUE;
+
+    unsigned char *data = image.GetData();
+
+    // paint pixel by pixel
+    for ( wxCoord srcX = 0; srcX < w; srcX++ )
+    {
+        for ( wxCoord srcY = 0; srcY < h; srcY++ )
+        {
+            // transform source coords to dest coords
+            double r = sqrt(srcX*srcX + srcY*srcY);
+            double angleOrig = atan2(srcY, srcX) - rad;
+            wxCoord dstX = (wxCoord)(r*cos(angleOrig) + 0.5),
+                    dstY = (wxCoord)(r*sin(angleOrig) + 0.5);
+
+            // black pixel?
+            bool textPixel = data[(srcY*w + srcX)*3] == 0;
+            if ( textPixel || (m_backgroundMode == wxSOLID) )
+            {
+                // change colour if needed
+                if ( textPixel != textColSet )
+                {
+                    gdk_gc_set_foreground( m_textGC, textPixel ? colText
+                                                               : colBack );
+
+                    textColSet = textPixel;
+                }
+
+                // don't use DrawPoint() because it uses the current pen
+                // colour, and we don't need it here
+                gdk_draw_point( m_window, m_textGC,
+                                XLOG2DEV(x + dstX), YLOG2DEV(y + dstY) );
+            }
+        }
+    }
+
+    // it would be better to draw with non underlined font and draw the line
+    // manually here (it would be more straight...)
+#if 0
+    if ( m_font.GetUnderlined() )
+    {
+        gdk_draw_line( m_window, m_textGC,
+                       XLOG2DEV(x + x4), YLOG2DEV(y + y4 + font->descent),
+                       XLOG2DEV(x + x3), YLOG2DEV(y + y3 + font->descent));
+    }
+#endif // 0
+
+    // restore the font colour
+    gdk_gc_set_foreground( m_textGC, colText );
+
+    // update the bounding box
+    CalcBoundingBox(x + minX, y + minY);
+    CalcBoundingBox(x + maxX, y + maxY);
+}
+
 void wxWindowDC::DoGetTextExtent(const wxString &string,
                                  wxCoord *width, wxCoord *height,
                                  wxCoord *descent, wxCoord *externalLeading,
@@ -813,7 +935,7 @@ void wxWindowDC::DoGetTextExtent(const wxString &string,
 wxCoord wxWindowDC::GetCharWidth() const
 {
     GdkFont *font = m_font.GetInternalFont( m_scaleY );
-    wxCHECK_MSG( font, -1, _T("invalid font") );
+    wxCHECK_MSG( font, -1, wxT("invalid font") );
 
     return wxCoord(gdk_string_width( font, "H" ) / m_scaleX);
 }
@@ -821,7 +943,7 @@ wxCoord wxWindowDC::GetCharWidth() const
 wxCoord wxWindowDC::GetCharHeight() const
 {
     GdkFont *font = m_font.GetInternalFont( m_scaleY );
-    wxCHECK_MSG( font, -1, _T("invalid font") );
+    wxCHECK_MSG( font, -1, wxT("invalid font") );
 
     return wxCoord((font->ascent + font->descent) / m_scaleY);
 }