/// <summary>
/// Raises the PaintBackground event
/// </summary>
/// <param name="e">A PaintCellEventArgs that contains the event data</param>
protected override void OnPaintBackground(PaintCellEventArgs e)
{
base.OnPaintBackground(e);
// don't bother going any further if the Cell is null
if (e.Cell == null)
{
return;
}
// get the button state
ButtonRendererData rendererData = this.GetButtonRendererData(e.Cell);
PushButtonStates state = rendererData.ButtonState;
// if the cell has focus and is in its normal state,
// make the button look like a default button
if (state == PushButtonStates.Normal && e.Focused)
{
state = PushButtonStates.Default;
}
// if the table is not enabled, make sure the button is disabled
if (!e.Enabled)
{
state = PushButtonStates.Disabled;
}
// draw the button
ThemeManager.DrawButton(e.Graphics, this.CalcButtonBounds(), state);
}
/// <summary>
/// Raises the MouseEnter event
/// </summary>
/// <param name="e">A CellMouseEventArgs that contains the event data</param>
public override void OnMouseEnter(CellMouseEventArgs e)
{
base.OnMouseEnter(e);
// get the button renderer data
ButtonRendererData rendererData = this.GetButtonRendererData(e.Cell);
// if the mouse is inside the button, make sure it is "hot"
if (this.CalcButtonBounds().Contains(e.X, e.Y))
{
if (rendererData.ButtonState != PushButtonStates.Hot)
{
rendererData.ButtonState = PushButtonStates.Hot;
e.Table.Invalidate(e.CellRect);
}
}
// the mouse isn't inside the button, so it is in its normal state
else
{
if (rendererData.ButtonState != PushButtonStates.Normal)
{
rendererData.ButtonState = PushButtonStates.Normal;
e.Table.Invalidate(e.CellRect);
}
}
}
/// <summary>
/// Gets the ButtonCellRenderer specific data used by the Renderer from
/// the specified Cell
/// </summary>
/// <param name="cell">The Cell to get the ButtonCellRenderer data for</param>
/// <returns>The ButtonCellRenderer data for the specified Cell</returns>
protected ButtonRendererData GetButtonRendererData(Cell cell)
{
object rendererData = this.GetRendererData(cell);
if (rendererData == null || !(rendererData is ButtonRendererData))
{
rendererData = new ButtonRendererData();
this.SetRendererData(cell, rendererData);
}
return((ButtonRendererData)rendererData);
}
/// <summary>
/// Raises the MouseLeave event
/// </summary>
/// <param name="e">A CellMouseEventArgs that contains the event data</param>
public override void OnMouseLeave(CellMouseEventArgs e)
{
base.OnMouseLeave(e);
// get the button renderer data
ButtonRendererData rendererData = this.GetButtonRendererData(e.Cell);
// make sure the button is in its normal state
if (rendererData.ButtonState != PushButtonStates.Normal)
{
rendererData.ButtonState = PushButtonStates.Normal;
e.Table.Invalidate(e.CellRect);
}
}
/// <summary>
/// Raises the KeyDown event
/// </summary>
/// <param name="e">A CellKeyEventArgs that contains the event data</param>
public override void OnKeyDown(CellKeyEventArgs e)
{
base.OnKeyDown(e);
// get the button renderer data
ButtonRendererData rendererData = this.GetButtonRendererData(e.Cell);
//
if (e.KeyData == Keys.Enter || e.KeyData == Keys.Space)
{
rendererData.ButtonState = PushButtonStates.Pressed;
e.Table.Invalidate(e.CellRect);
}
}
/// <summary>
/// Raises the KeyUp event
/// </summary>
/// <param name="e">A CellKeyEventArgs that contains the event data</param>
public override void OnKeyUp(CellKeyEventArgs e)
{
base.OnKeyUp(e);
// get the button renderer data
ButtonRendererData rendererData = this.GetButtonRendererData(e.Cell);
//
if (e.KeyData == Keys.Enter || e.KeyData == Keys.Space)
{
rendererData.ButtonState = PushButtonStates.Normal;
e.Table.Invalidate(e.CellRect);
e.Table.OnCellButtonClicked(new CellButtonEventArgs(e.Cell, e.Column, e.Row));
}
}
/// <summary>
/// Raises the MouseUp event
/// </summary>
/// <param name="e">A CellMouseEventArgs that contains the event data</param>
public override void OnMouseUp(CellMouseEventArgs e)
{
base.OnMouseUp(e);
// get the button renderer data
ButtonRendererData rendererData = this.GetButtonRendererData(e.Cell);
// check for the left mouse button
if (e.Button == MouseButtons.Left)
{
Rectangle buttonRect = this.CalcButtonBounds();
// if the mouse pointer is over the button, make sure
// the button is "hot"
if (buttonRect.Contains(e.X, e.Y))
{
rendererData.ButtonState = PushButtonStates.Hot;
e.Table.Invalidate(e.CellRect);
// check if the click started inside the button. if
// it did, Raise the tables CellButtonClicked event
if (buttonRect.Contains(rendererData.ClickPoint))
{
e.Table.OnCellButtonClicked(new CellButtonEventArgs(e.Cell, e.Column, e.Row));
}
}
else
{
// the mouse was released somewhere outside of the button,
// so make set the button back to its normal state
if (rendererData.ButtonState != PushButtonStates.Normal)
{
rendererData.ButtonState = PushButtonStates.Normal;
e.Table.Invalidate(e.CellRect);
}
}
}
// reset the click point
rendererData.ClickPoint = Point.Empty;
}
/// <summary>
/// Raises the MouseDown event
/// </summary>
/// <param name="e">A CellMouseEventArgs that contains the event data</param>
public override void OnMouseDown(CellMouseEventArgs e)
{
base.OnMouseDown(e);
// get the button renderer data
ButtonRendererData rendererData = this.GetButtonRendererData(e.Cell);
// check if the left mouse button is pressed
if (e.Button == MouseButtons.Left)
{
// record where the click started
rendererData.ClickPoint = new Point(e.X, e.Y);
// if the click was inside the button, set the button state to pressed
if (this.CalcButtonBounds().Contains(rendererData.ClickPoint))
{
rendererData.ButtonState = PushButtonStates.Pressed;
e.Table.Invalidate(e.CellRect);
}
}
}
/// <summary>
/// Gets the ButtonCellRenderer specific data used by the Renderer from
/// the specified Cell
/// </summary>
/// <param name="cell">The Cell to get the ButtonCellRenderer data for</param>
/// <returns>The ButtonCellRenderer data for the specified Cell</returns>
protected ButtonRendererData GetButtonRendererData(Cell cell)
{
object rendererData = this.GetRendererData(cell);
if (rendererData == null || !(rendererData is ButtonRendererData))
{
rendererData = new ButtonRendererData();
this.SetRendererData(cell, rendererData);
}
return (ButtonRendererData) rendererData;
}
/// <summary>
/// Raises the MouseMove event
/// </summary>
/// <param name="e">A CellMouseEventArgs that contains the event data</param>
public override void OnMouseMove(CellMouseEventArgs e)
{
base.OnMouseMove(e);
// get the button renderer data
ButtonRendererData rendererData = this.GetButtonRendererData(e.Cell);
Rectangle buttonRect = this.CalcButtonBounds();
// check if the left mouse button is pressed
if (e.Button == MouseButtons.Left)
{
// check if the mouse press originated in the button area
if (buttonRect.Contains(rendererData.ClickPoint))
{
// check if the mouse is currently in the button
if (buttonRect.Contains(e.X, e.Y))
{
// make sure the button is pressed
if (rendererData.ButtonState != PushButtonStates.Pressed)
{
rendererData.ButtonState = PushButtonStates.Pressed;
e.Table.Invalidate(e.CellRect);
}
}
else
{
// the mouse isn't inside the button so make sure it is "hot"
if (rendererData.ButtonState != PushButtonStates.Hot)
{
rendererData.ButtonState = PushButtonStates.Hot;
e.Table.Invalidate(e.CellRect);
}
}
}
}
else
{
// check if the mouse is currently in the button
if (buttonRect.Contains(e.X, e.Y))
{
// the mouse is inside the button so make sure it is "hot"
if (rendererData.ButtonState != PushButtonStates.Hot)
{
rendererData.ButtonState = PushButtonStates.Hot;
e.Table.Invalidate(e.CellRect);
}
}
else
{
// not inside the button so make sure it is in its normal state
if (rendererData.ButtonState != PushButtonStates.Normal)
{
rendererData.ButtonState = PushButtonStates.Normal;
e.Table.Invalidate(e.CellRect);
}
}
}
}