private double xPosition(TextVisual visual)
{
if (GridType == GridType.RowHeader) {
return 0.0;
}
return Points.xPosition(visual.Column);
}
private double yPosition(TextVisual visual)
{
if (GridType == GridType.ColumnHeader) {
return 0.0;
}
return Points.yPosition(visual.Row);
}
private void DrawCells(GridRange newViewport, IGrid<string> data)
{
var orgGrid = _visualGrid;
_visualGrid = new Grid<TextVisual>(
newViewport,
(r, c) => {
if (_dataViewport.Contains(r, c)) {
return orgGrid[r, c];
}
var visual = new TextVisual();
visual.Row = r;
visual.Column = c;
visual.Text = data[r, c];
visual.Typeface = Typeface;
visual.FontSize = FontSize * (96.0 / 72.0); // TODO: test in High DPI
return visual;
});
_visualChildren.Clear();
foreach (int c in newViewport.Columns.GetEnumerable()) {
foreach (int r in newViewport.Rows.GetEnumerable()) {
var visual = _visualGrid[r, c];
double width = Points.GetWidth(c) - GridLineThickness;
double height = Points.GetHeight(r) - GridLineThickness;
if (visual.Draw(new Size(width, height))) {
Points.SetWidth(c, Math.Max(width, visual.Size.Width + GridLineThickness));
Points.SetHeight(r, Math.Max(height, visual.Size.Height + GridLineThickness));
}
_visualChildren.Add(_visualGrid[r, c]);
}
}
foreach (int c in newViewport.Columns.GetEnumerable()) {
foreach (int r in newViewport.Rows.GetEnumerable()) {
var visual = _visualGrid[r, c];
var transform = visual.Transform as TranslateTransform;
if (transform == null) {
visual.Transform = new TranslateTransform(xPosition(visual), yPosition(visual));
} else {
transform.X = xPosition(visual);
transform.Y = yPosition(visual);
}
}
}
_dataViewport = newViewport;
// special handling for Row/Column header's size: this will layout system (measure/arrange) to know the size of component properly.
if (GridType == GridType.ColumnHeader && RowCount > 0) {
Height = Points.GetHeight(0);
} else if (GridType == GridType.RowHeader && ColumnCount > 0) {
Width = Points.GetWidth(0);
}
}