public void Render(Graphics g)
{
g.Clear(Color.White);
g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
if (lineNumbering)
{
g.FillRectangle(Brushes.AliceBlue, lineNumberArea);
g.DrawLine(Pens.DodgerBlue, lineNumberArea.Right, lineNumberArea.Top, lineNumberArea.Right, lineNumberArea.Bottom);
}
int line = viewPosn.Line;
int numLines = NumVisibleLines;
List <SubLine> subLines;
int extraSubLines = viewPosn.SubLine;;
int i = 0;
Line l = null;
while (i < numLines && line < doc.NumLines)
{
l = doc[line];
if (line >= doc.NumLines)
{
return;
}
int subLineIndex = 0;
if (lineNumbering && extraSubLines == 0)
{
TextRenderer.DrawText(g, (line + 1).ToString(), FontInfo.Default.Font, lineNumberRects[i], Color.DodgerBlue, tffr);
}
subLines = l.VisibleSubLines;
while (i < numLines && subLineIndex < subLines.Count)
{
if (extraSubLines-- > 0)
{
subLineIndex++;
}
else
{
SubLine sl = subLines[subLineIndex++];
sl.Render(g, rects[i++], viewPosn.Column, getSelectionArea(line, sl));
}
}
extraSubLines = 0;
line++;
}
}
private Point getSelectionArea(int LineNum, SubLine SubLine)
{
if (Selection == null || Selection.IsEmpty)
{
return(Point.Empty);
}
if (Selection.End.LineNumber < LineNum)
{
return(Point.Empty);
}
if (Selection.Start.LineNumber > LineNum)
{
return(Point.Empty);
}
if (Selection.Start.LineNumber < LineNum && Selection.End.LineNumber > LineNum)
{
return(new Point(0, int.MaxValue / 2));
}
if (Selection.Start.LineNumber < LineNum)
{
return(new Point(0, Selection.End.ColumnNumber - SubLine.Start));
}
if (Selection.End.LineNumber > LineNum)
{
return(new Point(Math.Max(0, Selection.Start.ColumnNumber - SubLine.Start), int.MaxValue / 2));
}
if (selection.End.ColumnNumber <= SubLine.Start)
{
return(Point.Empty);
}
return(new Point(Math.Max(0, Selection.Start.ColumnNumber - SubLine.Start), Selection.End.ColumnNumber - Math.Max(SubLine.Start, Selection.Start.ColumnNumber)));
}
public QTextBox(Font Font, StringComparer Comparer)
{
InitializeComponent(); // NOP
this.SuspendLayout();
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.Name = "QTextBox";
this.DoubleBuffered = true;
this.BackColor = Color.White;
FontInfo.SetFont(Font);
ki = new KeywordInfo(comparer = Comparer);
SubLine.SetKeywordInfo(ki);
Line.SetKeywordInfo(ki);
currentView = new View(new Document(4), this);
curDoc = currentView.Document;
EventManager.ViewChanged += () =>
{
vsb.SetValue(currentView.FirstVisibleLine);
this.Invalidate();
};
EventManager.DocumentChanged += () => { if (DocumentChanged != null)
{
DocumentChanged.Invoke(this, EventArgs.Empty);
}
};
EventManager.CaretLocationChanged += () => { if (CaretLocationChanged != null)
{
CaretLocationChanged.Invoke(currentView.CaretDocLoc);
}
};
EventManager.SelectionChanged += () => { if (SelectionChanged != null)
{
SelectionChanged.Invoke(this, EventArgs.Empty);
}
};
EventManager.NumLinesChanged += updateMaxLinesChanged;
EventManager.LongestLineChanged += updateForLongestLine;
vsb = new QVScrollBar(SCROLL_BAR_WIDTH);
this.Controls.Add(vsb);
vsb.ValChanged += (e) =>
{
switch (e.Delta)
{
case -1:
if (!currentView.ScrollView(-1))
{
e.Accept = false;
}
break;
case 1:
if (!currentView.ScrollView(1))
{
e.Accept = false;
}
break;
default:
currentView.FirstVisibleLine = vsb.Value;
break;
}
};
hsb = new QHScrollBar(SCROLL_BAR_WIDTH);
this.Controls.Add(hsb);
hsb.ValueChanged += (s, e) =>
{
currentView.FirstVisibleColumn = hsb.Value;
this.Invalidate();
};
hsb.Visible = false;
this.ResumeLayout(false);
ViewEnvironment.NumColumnsPerLineChanged += setMetrics;
FontInfo.FontMetricsChanged += setMetrics;
EventManager.DocumentChangedChanged += () => { if (this.DocumentChangedChanged != null)
{
DocumentChangedChanged.Invoke(this, EventArgs.Empty);
}
};
this.Size = new System.Drawing.Size(492, 313);
}
