Hi,
I am having difficulties creating a derived class for
DisabledDataGridViewTextBoxColumn and cell when the VisualStyle is not
supported. Basically I am down to either using ControlPaint or Graphics
to achieve this. But with Graphics, I am not sure how I can make them
diabled.
Below are my codes:
class DataGridViewDisabledTextBoxColumn : DataGridViewTextBoxColumn
{
public DataGridViewDisabledTextBoxColumn() {
this.CellTemplate = new DataGridViewDisabledTextBoxCell();
}
}
public class DataGridViewDisabledTextBoxCell :
DataGridViewTextBoxCell {
private bool enabledValue;
public bool Enabled {
get {
return enabledValue;
}
set {
enabledValue = value;
}
}
// Override the Clone method so that the Enabled property is
copied.
public override object Clone() {
DataGridViewDisabledTextBoxCell cell =
(DataGridViewDisabledTextBoxCell)base.Clone();
cell.Enabled = this.Enabled;
return cell;
}
// By default, enable the textbox cell.
public DataGridViewDisabledTextBoxCell() {
this.enabledValue = true;
}
protected override void Paint(Graphics graphics,
Rectangle clipBounds, Rectangle cellBounds, int rowIndex,
DataGridViewElementStates elementState, object value,
object formattedValue, string errorText,
DataGridViewCellStyle cellStyle,
DataGridViewAdvancedBorderStyle advancedBorderStyle,
DataGridViewPaintParts paintParts) {
// The button cell is disabled, so paint the border,
// background, and disabled button for the cell.
if (!this.enabledValue) {
// Draw the cell background, if specified.
if ((paintParts & DataGridViewPaintParts.Background) ==
DataGridViewPaintParts.Background) {
SolidBrush cellBackground =
new SolidBrush(cellStyle.BackColor);
graphics.FillRectangle(cellBackground, cellBounds);
cellBackground.Dispose();
}
// Draw the cell borders, if specified.
if ((paintParts & DataGridViewPaintParts.Border) ==
DataGridViewPaintParts.Border) {
PaintBorder(graphics, clipBounds, cellBounds,
cellStyle,
advancedBorderStyle);
}
// Calculate the area in which to draw the textbox.
Rectangle textBoxArea = cellBounds;
Rectangle textBoxAdjustment =
this.BorderWidths(advancedBorderStyle);
textBoxArea.X += textBoxAdjustment.X;
textBoxArea.Y += textBoxAdjustment.Y;
textBoxArea.Height -= textBoxAdjustment.Height;
textBoxArea.Width -= textBoxAdjustment.Width;
// Draw the disabled textbox
if
(System.Windows.Forms.VisualStyles.VisualStyleRenderer.IsSupported &&
Application.RenderWithVisualStyles) {
if
(System.Windows.Forms.VisualStyles.VisualStyleRenderer.IsElementDefined(System.Windows.Forms.VisualStyles.VisualStyleElement.Button.PushButton.Normal))
{
TextBoxRenderer.DrawTextBox(graphics,
textBoxArea, System.Windows.Forms.VisualStyles.TextBoxState.Disabled);
// Draw the disabled text.
if (this.FormattedValue is String) {
TextRenderer.DrawText(graphics,
(string)this.FormattedValue,
this.DataGridView.Font,
textBoxArea, SystemColors.GrayText);
}
}
} else {
Brush brsh = new SolidBrush(Color.Gray);
Brush brFill = new SolidBrush(Color.LightGray);
Pen p = new Pen(brsh,1);
graphics.DrawRectangle(p, textBoxArea);
graphics.FillRectangle(brFill, textBoxArea);
graphics.DrawString((string)this.FormattedValue,
this.DataGridView.Font, brsh, textBoxArea);
}
} else {
base.Paint(graphics, clipBounds, cellBounds,
rowIndex,
elementState, value, formattedValue, errorText,
cellStyle, advancedBorderStyle, paintParts);
}
}
}
I would appreciate if anyone can point me out here.
Thanks,
Sunny