void iupPlot::DrawBackground(cdCanvas* canvas) const
{
cdCanvasOrigin(canvas, 0, 0);
cdCanvasClip(canvas, CD_CLIPOFF);
cdCanvasSetForeground(canvas, mBack.mColor);
cdCanvasBox(canvas, mViewportBack.mX, mViewportBack.mX + mViewportBack.mWidth - 1, mViewportBack.mY, mViewportBack.mY + mViewportBack.mHeight - 1);
}
void iupPlot::DrawInactive(cdCanvas* canvas) const
{
cdCanvasOrigin(canvas, 0, 0);
cdCanvasClip(canvas, CD_CLIPOFF);
long inactive_color = cdEncodeAlpha(CD_GRAY, 96);
cdCanvasSetForeground(canvas, inactive_color);
cdCanvasBox(canvas, mViewportBack.mX, mViewportBack.mX + mViewportBack.mWidth - 1, mViewportBack.mY, mViewportBack.mY + mViewportBack.mHeight - 1);
}
void cdCanvasRestoreState(cdCanvas* canvas, cdState* state)
{
assert(canvas);
assert(state);
if (!state || !_cdCheckCanvas(canvas)) return;
/* clippling must be done in low level because origin and invert y axis */
canvas->clip_poly_n = state->clip_poly_n;
if (canvas->clip_poly)
{
free(canvas->clip_poly);
canvas->clip_poly = NULL;
}
if (canvas->clip_fpoly)
{
free(canvas->clip_fpoly);
canvas->clip_fpoly = NULL;
}
if (state->clip_poly)
{
int size = state->clip_poly_n*sizeof(cdPoint);
canvas->clip_poly = (cdPoint*)malloc(size);
memcpy(canvas->clip_poly, state->clip_poly, size);
}
if (state->clip_fpoly)
{
int size = state->clip_poly_n*sizeof(cdfPoint);
canvas->clip_fpoly = (cdfPoint*)malloc(size);
memcpy(canvas->clip_fpoly, state->clip_fpoly, size);
}
cdCanvasClip(canvas, CD_CLIPOFF);
if (canvas->clip_fpoly)
canvas->cxFPoly(canvas->ctxcanvas, CD_CLIP, state->clip_fpoly, state->clip_poly_n);
else if (canvas->clip_poly)
canvas->cxPoly(canvas->ctxcanvas, CD_CLIP, state->clip_poly, state->clip_poly_n);
cdCanvasClipArea(canvas, state->clip_rect.xmin, state->clip_rect.xmax, state->clip_rect.ymin, state->clip_rect.ymax);
if (canvas->cxFClipArea)
canvas->cxFClipArea(canvas->ctxcanvas, state->clip_frect.xmin, state->clip_frect.xmax, state->clip_frect.ymin, state->clip_frect.ymax);
else if (canvas->cxClipArea)
canvas->cxClipArea(canvas->ctxcanvas, state->clip_rect.xmin, state->clip_rect.xmax, state->clip_rect.ymin, state->clip_rect.ymax);
cdCanvasClip(canvas, state->clip_mode);
/* regular attributes */
cdCanvasSetBackground(canvas, state->background);
cdCanvasSetForeground(canvas, state->foreground);
cdCanvasBackOpacity(canvas, state->back_opacity);
cdCanvasWriteMode(canvas, state->write_mode);
cdCanvasLineStyle(canvas, state->line_style);
cdCanvasLineWidth(canvas, state->line_width);
cdCanvasLineCap(canvas, state->line_cap);
cdCanvasLineJoin(canvas, state->line_join);
cdCanvasFillMode(canvas, state->fill_mode);
cdCanvasLineStyleDashes(canvas, state->line_dashes, state->line_dashes_count);
cdCanvasHatch(canvas, state->hatch_style);
if (state->stipple) cdCanvasStipple(canvas, state->stipple_w, state->stipple_h, state->stipple);
if (state->pattern) cdCanvasPattern(canvas, state->pattern_w, state->pattern_h, state->pattern);
cdCanvasInteriorStyle(canvas, state->interior_style);
if (state->native_font[0])
cdCanvasNativeFont(canvas, state->native_font);
else
cdCanvasFont(canvas, state->font_type_face, state->font_style, state->font_size);
cdCanvasTextAlignment(canvas, state->text_alignment);
cdCanvasTextOrientation(canvas, state->text_orientation);
cdCanvasMarkType(canvas, state->mark_type);
cdCanvasMarkSize(canvas, state->mark_size);
cdCanvasOrigin(canvas, state->origin.x, state->origin.y);
if (state->use_matrix)
cdCanvasTransform(canvas, state->matrix);
wdCanvasWindow(canvas, state->window.xmin, state->window.xmax, state->window.ymin, state->window.ymax);
wdCanvasViewport(canvas, state->viewport.xmin, state->viewport.xmax, state->viewport.ymin, state->viewport.ymax);
cdCanvasSimulate(canvas, state->sim_mode);
/* complex clipping regions are not saved */
/* driver internal attributes are not saved */
}
bool iupPlot::Render(cdCanvas* canvas)
{
if (!mRedraw)
return true;
// Shift the drawing area to the plot viewport
cdCanvasOrigin(canvas, mViewport.mX, mViewport.mY);
// There are no additional transformations set in the CD canvas,
// all transformations are done here.
cdCanvasClip(canvas, CD_CLIPAREA);
// Draw the background, axis and grid restricted only by the viewport
cdCanvasClipArea(canvas, 0, mViewport.mWidth - 1, 0, mViewport.mHeight - 1);
// draw entire plot viewport
DrawBackground(canvas);
if (!mDataSetListCount)
return true;
cdCanvasNativeFont(canvas, IupGetAttribute(ih, "FONT"));
ConfigureAxis();
if (!CalculateAxisRange())
return false;
if (!CheckRange(mAxisX))
return false;
if (!CheckRange(mAxisY))
return false;
CalculateTitlePos();
// Must be before calculate margins
CalculateTickSize(canvas, mAxisX.mTick);
CalculateTickSize(canvas, mAxisY.mTick);
CalculateMargins(canvas);
iupPlotRect theDatasetArea;
theDatasetArea.mX = mBack.mMargin.mLeft;
theDatasetArea.mY = mBack.mMargin.mBottom;
theDatasetArea.mWidth = mViewport.mWidth - mBack.mMargin.mLeft - mBack.mMargin.mRight;
theDatasetArea.mHeight = mViewport.mHeight - mBack.mMargin.mTop - mBack.mMargin.mBottom;
if (!CalculateTickSpacing(theDatasetArea, canvas))
return false;
if (!CalculateXTransformation(theDatasetArea))
return false;
if (!CalculateYTransformation(theDatasetArea))
return false;
IFnC pre_cb = (IFnC)IupGetCallback(ih, "PREDRAW_CB");
if (pre_cb)
pre_cb(ih, canvas);
if (mBack.GetImage())
DrawBackgroundImage(canvas);
if (!mGrid.DrawX(mAxisX.mTickIter, mAxisX.mTrafo, theDatasetArea, canvas))
return false;
if (mGrid.mShowX)
mGridMinor.DrawX(mAxisX.mTickIter, mAxisX.mTrafo, theDatasetArea, canvas);
if (!mGrid.DrawY(mAxisY.mTickIter, mAxisY.mTrafo, theDatasetArea, canvas))
return false;
if (mGrid.mShowY)
mGridMinor.DrawY(mAxisY.mTickIter, mAxisY.mTrafo, theDatasetArea, canvas);
if (!mAxisX.DrawX(theDatasetArea, canvas, mAxisY))
return false;
if (!mAxisY.DrawY(theDatasetArea, canvas, mAxisX))
return false;
if (mBox.mShow)
mBox.Draw(theDatasetArea, canvas);
// draw the datasets, legend, crosshair and selection restricted to the dataset area
cdCanvasClipArea(canvas, theDatasetArea.mX, theDatasetArea.mX + theDatasetArea.mWidth - 1, theDatasetArea.mY, theDatasetArea.mY + theDatasetArea.mHeight - 1);
IFniiddi drawsample_cb = (IFniiddi)IupGetCallback(ih, "DRAWSAMPLE_CB");
for (int ds = 0; ds < mDataSetListCount; ds++)
{
iupPlotDataSet* dataset = mDataSetList[ds];
if (drawsample_cb)
{
iupPlotSampleNotify inNotify = { ih, ds, drawsample_cb };
dataset->DrawData(mAxisX.mTrafo, mAxisY.mTrafo, canvas, &inNotify);
}
else
dataset->DrawData(mAxisX.mTrafo, mAxisY.mTrafo, canvas, NULL);
}
if (mCrossHairH)
DrawCrossHairH(theDatasetArea, canvas);
else if (mCrossHairV)
DrawCrossHairV(theDatasetArea, canvas);
if (mShowSelectionBand)
{
if (mSelectionBand.mX < theDatasetArea.mX)
{
mSelectionBand.mWidth = mSelectionBand.mX + mSelectionBand.mWidth - theDatasetArea.mX;
mSelectionBand.mX = theDatasetArea.mX;
}
if (mSelectionBand.mY < theDatasetArea.mY)
{
mSelectionBand.mHeight = mSelectionBand.mY + mSelectionBand.mHeight - theDatasetArea.mY;
mSelectionBand.mY = theDatasetArea.mY;
}
if (mSelectionBand.mX + mSelectionBand.mWidth > theDatasetArea.mX + theDatasetArea.mWidth)
mSelectionBand.mWidth = theDatasetArea.mX + theDatasetArea.mWidth - mSelectionBand.mX;
if (mSelectionBand.mY + mSelectionBand.mHeight > theDatasetArea.mY + theDatasetArea.mHeight)
mSelectionBand.mHeight = theDatasetArea.mY + theDatasetArea.mHeight - mSelectionBand.mY;
mBox.Draw(mSelectionBand, canvas);
}
IFnC post_cb = (IFnC)IupGetCallback(ih, "POSTDRAW_CB");
if (post_cb)
post_cb(ih, canvas);
if (!DrawLegend(theDatasetArea, canvas, mLegend.mPos))
return false;
// Draw title restricted only by the viewport
cdCanvasClipArea(canvas, 0, mViewport.mWidth - 1, 0, mViewport.mHeight - 1);
DrawTitle(canvas);
if (!IupGetInt(ih, "ACTIVE"))
DrawInactive(canvas);
mRedraw = false;
return true;
}
