void CChart2D::OnPaint()
{
CPaintDC dc(this); // device context for painting
CDC memPlotDC;
CBitmap *oldBitmap;
CBitmap m_plotBitmap;
// Check if background need to be redrawn
if (m_updateBackground)
{
_DrawBackground(&dc);
m_updateBackground = false;
}
memPlotDC.CreateCompatibleDC(&dc);
m_plotBitmap.CreateCompatibleBitmap(&dc, m_ctlRect.Width(), m_ctlRect.Height());
oldBitmap = (CBitmap*)memPlotDC.SelectObject(&m_plotBitmap);
// BitBlt background
memPlotDC.BitBlt(0, 0, m_ctlRect.Width(), m_ctlRect.Height(), &memBkDC,0,0,SRCCOPY);
_PlotSeries(&memPlotDC);
dc.BitBlt(0,0, m_ctlRect.Width(), m_ctlRect.Height(), &memPlotDC,0,0,SRCCOPY);
memPlotDC.SelectObject(oldBitmap);
}
// Draw-function: called by SCENE
void SliderX::draw(void)
{
if(!vertexBufferID)
return;
glEnable(GL_CULL_FACE);
glCullFace(GL_BACK);
// at first, draw the slider's background image.
_DrawBackground();
if(DimensionsSwitched) // then draw the colored slider-bar sized to it's actual value...
_DrawBar(4,ValueY,ValueY.MOVE);
else
_DrawBar(0,ValueX,ValueX.MOVE);
// than draw the slider's main-image-frame...
_DrawForeground();
glDisable(GL_CULL_FACE);
glDisable(GL_TEXTURE_2D);
}
