void FalagardMultiLineEditbox::render()
{
MultiLineEditbox* w = (MultiLineEditbox*)d_window;
// render general frame and stuff before we handle the text itself
cacheEditboxBaseImagery();
// Render edit box text
Rectf textarea(getTextRenderArea());
cacheTextLines(textarea);
// draw caret
if ((w->hasInputFocus() && !w->isReadOnly()) &&
(!d_blinkCaret || d_showCaret))
cacheCaretImagery(textarea);
}
void FalagardMultiLineEditbox::cacheTextLines(const Rectf& dest_area)
{
MultiLineEditbox* w = (MultiLineEditbox*)d_window;
// text is already formatted, we just grab the lines and render them with the required alignment.
Rectf drawArea(dest_area);
float vertScrollPos = w->getVertScrollbar()->getScrollPosition();
drawArea.offset(Vector2f(-w->getHorzScrollbar()->getScrollPosition(), -vertScrollPos));
const Font* fnt = w->getFont();
if (fnt)
{
// calculate final colours to use.
ColourRect colours;
const float alpha = w->getEffectiveAlpha();
ColourRect normalTextCol;
setColourRectToUnselectedTextColour(normalTextCol);
normalTextCol.modulateAlpha(alpha);
ColourRect selectTextCol;
setColourRectToSelectedTextColour(selectTextCol);
selectTextCol.modulateAlpha(alpha);
ColourRect selectBrushCol;
w->hasInputFocus() ? setColourRectToActiveSelectionColour(selectBrushCol) :
setColourRectToInactiveSelectionColour(selectBrushCol);
selectBrushCol.modulateAlpha(alpha);
const MultiLineEditbox::LineList& d_lines = w->getFormattedLines();
const size_t numLines = d_lines.size();
// calculate the range of visible lines
size_t sidx,eidx;
sidx = static_cast<size_t>(vertScrollPos / fnt->getLineSpacing());
eidx = 1 + sidx + static_cast<size_t>(dest_area.getHeight() / fnt->getLineSpacing());
eidx = ceguimin(eidx, numLines);
drawArea.d_min.d_y += fnt->getLineSpacing()*static_cast<float>(sidx);
// for each formatted line.
for (size_t i = sidx; i < eidx; ++i)
{
Rectf lineRect(drawArea);
const MultiLineEditbox::LineInfo& currLine = d_lines[i];
String lineText(w->getTextVisual().substr(currLine.d_startIdx, currLine.d_length));
// offset the font little down so that it's centered within its own spacing
const float old_top = lineRect.top();
lineRect.d_min.d_y += (fnt->getLineSpacing() - fnt->getFontHeight()) * 0.5f;
// if it is a simple 'no selection area' case
if ((currLine.d_startIdx >= w->getSelectionEndIndex()) ||
((currLine.d_startIdx + currLine.d_length) <= w->getSelectionStartIndex()) ||
(w->getSelectionBrushImage() == 0))
{
colours = normalTextCol;
// render the complete line.
fnt->drawText(w->getGeometryBuffer(), lineText,
lineRect.getPosition(), &dest_area, colours);
}
// we have at least some selection highlighting to do
else
{
// Start of actual rendering section.
String sect;
size_t sectIdx = 0, sectLen;
float selStartOffset = 0.0f, selAreaWidth = 0.0f;
// render any text prior to selected region of line.
if (currLine.d_startIdx < w->getSelectionStartIndex())
{
// calculate length of text section
sectLen = w->getSelectionStartIndex() - currLine.d_startIdx;
// get text for this section
sect = lineText.substr(sectIdx, sectLen);
sectIdx += sectLen;
// get the pixel offset to the beginning of the selection area highlight.
selStartOffset = fnt->getTextAdvance(sect);
// draw this portion of the text
colours = normalTextCol;
fnt->drawText(w->getGeometryBuffer(), sect,
lineRect.getPosition(), &dest_area, colours);
// set position ready for next portion of text
lineRect.d_min.d_x += selStartOffset;
}
// calculate the length of the selected section
sectLen = ceguimin(w->getSelectionEndIndex() - currLine.d_startIdx, currLine.d_length) - sectIdx;
// get the text for this section
sect = lineText.substr(sectIdx, sectLen);
sectIdx += sectLen;
// get the extent to use as the width of the selection area highlight
selAreaWidth = fnt->getTextAdvance(sect);
const float text_top = lineRect.top();
lineRect.top(old_top);
// calculate area for the selection brush on this line
lineRect.left(drawArea.left() + selStartOffset);
lineRect.right(lineRect.left() + selAreaWidth);
lineRect.bottom(lineRect.top() + fnt->getLineSpacing());
// render the selection area brush for this line
colours = selectBrushCol;
w->getSelectionBrushImage()->render(w->getGeometryBuffer(), lineRect, &dest_area, colours);
// draw the text for this section
colours = selectTextCol;
fnt->drawText(w->getGeometryBuffer(), sect,
lineRect.getPosition(), &dest_area, colours);
lineRect.top(text_top);
// render any text beyond selected region of line
if (sectIdx < currLine.d_length)
{
// update render position to the end of the selected area.
lineRect.d_min.d_x += selAreaWidth;
// calculate length of this section
sectLen = currLine.d_length - sectIdx;
// get the text for this section
sect = lineText.substr(sectIdx, sectLen);
// render the text for this section.
colours = normalTextCol;
fnt->drawText(w->getGeometryBuffer(), sect,
lineRect.getPosition(), &dest_area, colours);
}
}
// update master position for next line in paragraph.
drawArea.d_min.d_y += fnt->getLineSpacing();
}
}
}