在 DatagridviewCell 内的图像上检测鼠标悬停

Question

我创建了一个自定义 DataGridView 列，它通过派生自 DataGridViewTextBoxCell 类来承载图像和文本。

我希望能够检测鼠标光标何时仅位于单元格的图像部分上。

我尝试为每个在 Paint() 方法中设置为图像边界的单元格创建一个 Rectangle 对象，并确定光标位置是否包含在 OnMouseMove() 处理程序的边界矩形中，但这没有工作。

  protected override void Paint(Graphics graphics, Rectangle clipBounds,
        Rectangle cellBounds, int rowIndex, DataGridViewElementStates cellState,
        object value, object formattedValue, string errorText,
        DataGridViewCellStyle cellStyle,
        DataGridViewAdvancedBorderStyle advancedBorderStyle,
        DataGridViewPaintParts paintParts)
    {
        // Paint the base content
        base.Paint(graphics, clipBounds, cellBounds, rowIndex, cellState,
           value, formattedValue, errorText, cellStyle,
           advancedBorderStyle, paintParts);

        if (this.Image != null)
        {
            imgBoundsRect = new Rectangle(cellBounds.Location, this.Image.Size);
            // Draw the image clipped to the cell.
            System.Drawing.Drawing2D.GraphicsContainer container = graphics.BeginContainer();

            graphics.SetClip(cellBounds);
            graphics.DrawImageUnscaled(this.Image, cellBounds);

            graphics.EndContainer(container);
        }
    }

    protected override void OnMouseMove(DataGridViewCellMouseEventArgs e)
    {
        base.OnMouseMove(e);
        Console.WriteLine(e.Location);
        if (imgBoundsRect.Contains(e.Location))
        {
            this.ToolTipText = "View Doc";
        }
    }

Answer 1

这并不能回答您的问题，但由于它适用于 DataGridViewImageCell，因此我决定将其作为参考。

您的代码看起来非常相似。确保将imgBoundsRect 的Location 保留在(0,0)，就像CellMouseMove 中的鼠标坐标一样！

private void dataGridView1_CellMouseMove(object sender, DataGridViewCellMouseEventArgs e)
{
    if (e.ColumnIndex < 0 || e.RowIndex < 0) return;
    DataGridViewImageCell iCell = 
                     dataGridView1[e.ColumnIndex, e.RowIndex] as DataGridViewImageCell;

    Text = "MISS";
    if (iCell != null)
    {
        Image img = iCell.FormattedValue as Image;
        Rectangle irect = new Rectangle(0, 0, img.Width, img.Height);
        Point relLoc = e.Location;
        if (irect.Contains(relLoc)) Text = "HIT";
    }
}