Amebis/wxWidgets
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

1. many DrawRotatedText() corrections (gtk)

Browse Source 
2. compilation fix for window.cpp (!HAVE_XIM)
3. mentioned wxGTK slider limitations in the docs


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4866 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
1999-12-08 08:19:45 +00:00
parent c717373949
commit 9a8c762076
8 changed files with 201 additions and 140 deletions
Download Patch File Download Diff File Expand all files Collapse all files

138
src/gtk1/dcclient.cpp
View File

@@ -41,6 +41,15 @@ static GdkPixmap **hatch_bitmap = (GdkPixmap **) NULL;
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
//-----------------------------------------------------------------------------
@@ -85,25 +94,6 @@ void gdk_draw_bitmap (GdkDrawable *drawable,
1 );
}
/*
* compare two doubles and return the larger rounded
* to the nearest int
*/
static int roundmax(double a, double b)
{
return (int)((a > b ? a : b) + 0.5);
}
/*
* compare two doubles and return the smaller rounded
* to the nearest int
*/
static int roundmin(double a, double b)
{
return (int)((a < b ? a : b) - 0.5);
}
//-----------------------------------------------------------------------------
// wxWindowDC
//-----------------------------------------------------------------------------
@@ -830,13 +820,12 @@ void wxWindowDC::DoDrawRotatedText( const wxString &text, wxCoord x, wxCoord y,
wxCHECK_RET( font, wxT("invalid font") );
// x = XLOG2DEV(x);
// y = YLOG2DEV(y);
// the size of the text
int w = gdk_string_width( font, text.mbc_str() );
int h = font->ascent + font->descent;
int cx = gdk_string_width( font, text.mbc_str() );
int cy = font->ascent + font->descent;
wxBitmap src(cx, cy);
// draw the string normally
wxBitmap src(w, h);
wxMemoryDC dc;
dc.SelectObject(src);
dc.SetFont(GetFont());
@@ -845,52 +834,87 @@ void wxWindowDC::DoDrawRotatedText( const wxString &text, wxCoord x, wxCoord y,
dc.Clear();
dc.DrawText(text, 0, 0);
dc.SetFont(wxNullFont);
dc.SelectObject(wxNullBitmap);
// Calculate the size of the rotated bounding box.
double dx = cos(angle / 180.0 * M_PI);
double dy = sin(angle / 180.0 * M_PI);
double x4 = -cy * dy;
double y4 = cy * dx;
double x3 = cx * dx;
double y3 = cx * dy;
double x2 = x3 + x4;
double y2 = y3 + y4;
double x1 = x;
double y1 = y;
double rad = DegToRad(angle);
double dx = cos(rad),
dy = sin(rad);
// Create image from the source bitmap after writing the text into it.
wxImage image(src);
// 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;
int minx = roundmin(0, roundmin(x4, roundmin(x2, x3)));
int miny = roundmin(0, roundmin(y4, roundmin(y2, y3)));
int maxx = roundmax(0, roundmax(x4, roundmax(x2, x3)));
int maxy = roundmax(0, roundmax(y4, roundmax(y2, y3)));
// 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);
// This rotates counterclockwise around the top left corner.
for (int rx = minx; rx < maxx; rx++)
// 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 (int ry = miny; ry < maxy; ry++)
for ( wxCoord srcY = 0; srcY < h; srcY++ )
{
// transform dest coords to source coords
int sx = (int) (rx * dx + ry * dy + 0.5);
int sy = (int) (ry * dx - rx * dy + 0.5);
if (sx >= 0 && sx < cx && sy >= 0 && sy < cy)
// 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) )
{
// draw black pixels, ignore white ones (i.e. transparent b/g)
if (image.GetRed(sx, sy) == 0)
// change colour if needed
if ( textPixel != textColSet )
{
DrawPoint(x1 + maxx - rx, cy + y1 - ry);
}
else
{
// Background
//DrawPoint(x1 + maxx - rx, cy + y1 + maxy - ry);
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) );
}
}
}
// TODO call CalcBoundingBox()
// 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,