如何用鼠标移动C＃表格图例？

Question

I am creating a plotting program and I was wondering how to move a chart's legend with the mouse? So you would click on the legend and then you could move it anywhere inside the chart area.

Answer 1

Using manual double-buffering of the chart, draw the legend at the current mouse position (perhaps + (15,15)) on the back-buffer just prior to drawing the back buffer to the screen. You can also set an Alpha to make the legend semi-transparent until the user drops it.

Answer 2

You can create a little form without borders to build your legend or use a ToolTip item. Then you could move with mouseMove event:

    private void frmMain_MouseMove(object sender, MouseEventArgs e)
    {
        if (e.Button = System.Windows.Forms.MouseButtons.Left)
            ChangeLegendPosition(e.X, e.Y);
    }

Where ChangeLegendPosition is your function that updates your form/tooltip position.