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DrawRotatedText() for MSW

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4844 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin 1999-12-06 17:40:39 +00:00
parent 2182e26fa3
commit 4314ec480e
2 changed files with 103 additions and 29 deletions
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3
include/wx/msw/dc.h
View File

@ -197,6 +197,9 @@ protected:
virtual void DoDrawSpline(wxList *points);
#endif // wxUSE_SPLINES
// common part of DoDrawText() and DoDrawRotatedText()
void DrawAnyText(const wxString& text, wxCoord x, wxCoord y);
// MSW-specific member variables
int m_windowExtX;
int m_windowExtY;

129
src/msw/dc.cpp
View File

@ -71,6 +71,18 @@ static const int VIEWPORT_EXTENT = 1000;
static const int MM_POINTS = 9;
static const int MM_METRIC = 10;
// usually this is defined in math.h
#ifndef M_PI
static const double M_PI = 3.14159265358979323846;
#endif // M_PI
// ---------------------------------------------------------------------------
// private functions
// ---------------------------------------------------------------------------
// convert degrees to radians
static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
// ===========================================================================
// implementation
// ===========================================================================
@ -538,15 +550,18 @@ void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,d
wxCoord x2 = (x+w);
wxCoord y2 = (y+h);
const double deg2rad = 3.14159265359 / 180.0;
int rx1 = XLOG2DEV(x+w/2);
int ry1 = YLOG2DEV(y+h/2);
int rx2 = rx1;
int ry2 = ry1;
rx1 += (int)(100.0 * abs(w) * cos(sa * deg2rad));
ry1 -= (int)(100.0 * abs(h) * m_signY * sin(sa * deg2rad));
rx2 += (int)(100.0 * abs(w) * cos(ea * deg2rad));
ry2 -= (int)(100.0 * abs(h) * m_signY * sin(ea * deg2rad));
sa = DegToRad(sa);
ea = DegToRad(ea);
rx1 += (int)(100.0 * abs(w) * cos(sa));
ry1 -= (int)(100.0 * abs(h) * m_signY * sin(sa));
rx2 += (int)(100.0 * abs(w) * cos(ea));
ry2 -= (int)(100.0 * abs(h) * m_signY * sin(ea));
// draw pie with NULL_PEN first and then outline otherwise a line is
// drawn from the start and end points to the centre
@ -625,41 +640,97 @@ void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask
void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
{
if (m_textForegroundColour.Ok())
SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
DWORD old_background = 0;
if (m_textBackgroundColour.Ok())
{
old_background = SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
}
if (m_backgroundMode == wxTRANSPARENT)
SetBkMode(GetHdc(), TRANSPARENT);
else
SetBkMode(GetHdc(), OPAQUE);
(void)TextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), WXSTRINGCAST text, wxStrlen(WXSTRINGCAST text));
if (m_textBackgroundColour.Ok())
(void)SetBkColor(GetHdc(), old_background);
// background colour is used only for DrawText, otherwise
// always TRANSPARENT, RR
SetBkMode(GetHdc(), TRANSPARENT);
DrawAnyText(text, x, y);
// update the bounding box
CalcBoundingBox(x, y);
wxCoord w, h;
GetTextExtent(text, &w, &h);
CalcBoundingBox((x + w), (y + h));
CalcBoundingBox(x + w, y + h);
}
void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
{
// prepare for drawing the text
if ( m_textForegroundColour.Ok() )
SetTextColor(GetHdc(), m_textForegroundColour.GetPixel());
DWORD old_background = 0;
if ( m_textBackgroundColour.Ok() )
{
old_background = SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
}
SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
: OPAQUE);
if ( ::TextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
text.c_str(), text.length()) != 0 )
{
wxLogLastError("TextOut");
}
// restore the old parameters (text foreground colour may be left because
// it never is set to anything else, but background should remain
// transparent even if we just drew an opaque string)
if ( m_textBackgroundColour.Ok() )
(void)SetBkColor(GetHdc(), old_background);
SetBkMode(GetHdc(), TRANSPARENT);
}
void wxDC::DoDrawRotatedText(const wxString& text,
wxCoord x, wxCoord y,
double angle)
{
wxFAIL_MSG( _T("TODO") );
if ( angle == 0.0 )
{
DoDrawText(text, x, y);
}
else
{
LOGFONT lf;
wxFillLogFont(&lf, &m_font);
// GDI wants the angle in tenth of degree
long angle10 = (long)(angle * 10);
lf.lfEscapement = angle10;
lf. lfOrientation = angle10;
HFONT hfont = ::CreateFontIndirect(&lf);
if ( !hfont )
{
wxLogLastError("CreateFont");
}
else
{
HFONT hfontOld = ::SelectObject(GetHdc(), hfont);
DrawAnyText(text, x, y);
(void)::SelectObject(GetHdc(), hfontOld);
}
// call the bounding box by adding all four vertices of the rectangle
// containing the text to it (simpler and probably not slower than
// determining which of them is really topmost/leftmost/...)
wxCoord w, h;
GetTextExtent(text, &w, &h);
double rad = DegToRad(angle);
// "upper left" and "upper right"
CalcBoundingBox(x, y);
CalcBoundingBox(x + w*cos(rad), y - h*sin(rad));
CalcBoundingBox(x + h*sin(rad), y + h*cos(rad));
// "bottom left" and "bottom right"
x += (wxCoord)(h*sin(rad));
y += (wxCoord)(h*cos(rad));
CalcBoundingBox(x, y);
CalcBoundingBox(x + h*sin(rad), y + h*cos(rad));
}
}
// ---------------------------------------------------------------------------