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Edit Box - measure and draw lines

This commit is contained in:
Vadim Lopatin 2014-04-21 11:01:50 +04:00
parent e04d2ab7a5
commit d9162b7496
1 changed files with 45 additions and 5 deletions
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50
src/dlangui/widgets/editors.d
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@ -371,7 +371,7 @@ class EditLine : EditWidgetBase {
protected void measureText() {
FontRef font = font();
Point sz = font.textSize(text);
//Point sz = font.textSize(text);
_measuredText = text;
_measuredTextWidths.length = _measuredText.length;
int charsMeasured = font.measureText(_measuredText, _measuredTextWidths, int.max);
@ -499,8 +499,9 @@ class EditLine : EditWidgetBase {
/// single line editor
class EditBox : EditWidgetBase {
ScrollBar _hscrollbar;
ScrollBar _vscrollbar;
protected ScrollBar _hscrollbar;
protected ScrollBar _vscrollbar;
this(string ID, dstring initialContent = null) {
super(ID);
_content = new EditableContent(true); // multiline
@ -513,6 +514,38 @@ class EditBox : EditWidgetBase {
addChild(_vscrollbar);
}
protected int _lineHeight;
protected Point _scrollPos;
protected int _firstVisibleLine;
protected int _numVisibleLines; // number of lines visible in client area
protected dstring[] _visibleLines; // text for visible lines
protected int[][] _visibleLinesMeasurement; // char positions for visible lines
protected int[] _visibleLinesWidths; // width (in pixels) of visible lines
protected Point measureVisibleText() {
Point sz;
FontRef font = font();
_lineHeight = font.height;
_numVisibleLines = (_clientRc.height + _lineHeight - 1) / _lineHeight;
if (_firstVisibleLine + _numVisibleLines > _content.length)
_numVisibleLines = _content.length - _firstVisibleLine;
_visibleLines.length = _numVisibleLines;
_visibleLinesMeasurement.length = _numVisibleLines;
_visibleLinesWidths.length = _numVisibleLines;
for (int i = 0; i < _numVisibleLines; i++) {
_visibleLines[i] = _content[i];
_visibleLinesMeasurement[i].length = _visibleLines[i].length;
int charsMeasured = font.measureText(_visibleLines[i], _visibleLinesMeasurement[i], int.max);
_visibleLinesWidths[i] = charsMeasured > 0 ? _visibleLinesMeasurement[i][charsMeasured - 1] : 0;
if (sz.x < _visibleLinesWidths[i])
sz.x = _visibleLinesWidths[i]; // width - max from visible lines
}
sz.y = _lineHeight * _content.length; // height - for all lines
return sz;
}
override bool onContentChange(EditableContent content, EditOperation operation, ref TextRange rangeBefore, ref TextRange rangeAfter) {
//measureText();
_caretPos = rangeAfter.end;
@ -558,7 +591,7 @@ class EditBox : EditWidgetBase {
int hsbheight = _hscrollbar.measuredHeight;
int vsbwidth = _vscrollbar.measuredWidth;
//measureText();
Point textSz = Point(200, 150); // TODO
Point textSz = measureVisibleText();
measuredContent(parentWidth, parentHeight, textSz.x + vsbwidth, textSz.y + hsbheight);
}
@ -585,6 +618,7 @@ class EditBox : EditWidgetBase {
_clientRc = rc;
_clientRc.right -= vsbwidth;
_clientRc.bottom -= hsbheight;
Point textSz = measureVisibleText();
}
/// draw content
@ -601,7 +635,13 @@ class EditBox : EditWidgetBase {
//dstring txt = text;
//Point sz = font.textSize(txt);
//font.drawText(buf, rc.left, rc.top + sz.y / 10, txt, textColor);
buf.fillRect(_clientRc, 0x80E0E0FF);
for (int i = 0; i < _visibleLines.length; i++) {
dstring txt = _visibleLines[i];
if (txt.length > 0)
font.drawText(buf, rc.left, rc.top + i * _lineHeight, txt, textColor);
}
//buf.fillRect(_clientRc, 0x80E0E0FF); // testing clientRc
if (focused) {
// draw caret
Rect caretRc = textPosToClient(_caretPos);