/// <summary>
/// OnMouseMove
/// </summary>
/// <remarks>
/// shows tolltip for image columns.
/// </remarks>
/// <param name="e"></param>
protected override void OnMouseMove(MouseEventArgs e)
{
// finds the point on the client side.
HitTestInfo info = HitTest(e.X, e.Y);
if (info.Type == HitTestType.Cell && (info.Row != tooltipSelectedRow || info.Column != tooltipSelectedColumn))
{
DataGridImageColumn imageColumn = this.TableStyles[0].GridColumnStyles[info.Column] as DataGridImageColumn;
if (imageColumn != null)
{
// forse redraw;
imageToolTip.Active = false;
imageToolTip.Active = true;
}
else
{
imageToolTip.Active = false;
}
tooltipSelectedRow = info.Row;
tooltipSelectedColumn = info.Column;
}
base.OnMouseMove(e);
}
/// <summary>
/// Inits the DataGridTableStyle according to the types of the columns.
/// </summary>
/// <param name="tableStyle">table style</param>
/// <param name="column">underline DataSource column</param>
private void InitDataTableColumnAndStyle(DataGridTableStyle tableStyle, DataColumn column)
{
//if column's name starts with # - then user DataGridColumnStyle should be used.
if (column.ColumnName[0] == TypeDelimiter)
{
string[] columnType = column.ColumnName.Split(TypeDelimiter);
if (columnType[1] == DBViewerConstants.ImageColumnType)
{
DataGridImageColumn imageColumn = new DataGridImageColumn();
column.ColumnName = columnType[2];
SetDataTableColumnStyleProperties(tableStyle, imageColumn, column);
}
else if (columnType[1] == DBViewerConstants.BinaryColumnType)
{
DataGridBinaryColumn binaryColumn = new DataGridBinaryColumn();
column.ColumnName = columnType[2];
SetDataTableColumnStyleProperties(tableStyle, binaryColumn, column);
EnableSave(binaryColumn);
}
}
else
{
DataGridTextBoxColumn textBoxColumn = new DataGridTextBoxColumn();
SetDataTableColumnStyleProperties(tableStyle, textBoxColumn, column);
EnableSave(textBoxColumn);
}
}
/// <summary>
/// OnDoubleClick
/// </summary>
/// <remarks>
/// 1. Shows the image from the DataSource in the <see cref="ImageViewer"/>.
/// 2. If the ImageViewer requests to save the loaded image, saves it the DataSource.
/// </remarks>
/// <param name="e"></param>
protected override void OnDoubleClick(EventArgs e)
{
base.OnDoubleClick(e);
// finds the point on the client side.
Point pt = this.PointToClient(Cursor.Position);
// test the point
HitTestInfo info = this.HitTest(pt);
if (info.Type == HitTestType.Cell)
{
// if it is DataGridImageColumn (column that represents image)
DataGridImageColumn style = this.TableStyles[0].GridColumnStyles[info.Column] as DataGridImageColumn;
if (style != null && info.Row < ((DataTable)this.DataSource).Rows.Count)
{
ImageViewer imageViewer = new ImageViewer();
imageViewer.Image = ExtractImageFromDataSource(info.Row, info.Column);
if (imageViewer.ShowDialog(this) == DialogResult.OK)
{
SaveImageToDataSource(imageViewer.Image, info.Row, info.Column);
}
imageViewer.Dispose();
}
}
}