private void btOK_Click(object sender, EventArgs e)
{
bool inputValid = true;
//Sanity Check
if (!ValidateInput(txtXMin))
{
inputValid = false;
}
if (!ValidateInput(txtXMax))
{
inputValid = false;
}
if (!ValidateInput(txtYMin))
{
inputValid = false;
}
if (!ValidateInput(txtYMax))
{
inputValid = false;
}
if (!inputValid)
{
MessageBox.Show("Invalid input values!", this.Text,
MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
//Limit Check
double xStart = Convert.ToDouble(txtXMin.Text);
double xEnd = Convert.ToDouble(txtXMax.Text);
double yStart = Convert.ToDouble(txtYMin.Text);
double yEnd = Convert.ToDouble(txtYMax.Text);
//Perform ZOOM
double XMin = ptrXAxis.ValueToPixelPosition(xStart);
double XMax = ptrXAxis.ValueToPixelPosition(xEnd);
double YMin = ptrYAxis.ValueToPixelPosition(yStart);
double YMax = ptrYAxis.ValueToPixelPosition(yEnd);
ptrXAxis.ScaleView.Zoom(xStart, xEnd);
ptrYAxis.ScaleView.Zoom(yStart, yEnd);
//Swtich to next axis
ptrXAxis = (ptrXAxis == ptrChartArea.AxisX) ? ptrChartArea.AxisX2 : ptrChartArea.AxisX;
ptrYAxis = (ptrYAxis == ptrChartArea.AxisY) ? ptrChartArea.AxisY2 : ptrChartArea.AxisY;
ptrXAxis.ScaleView.Zoom(ptrXAxis.PixelPositionToValue(XMin), ptrXAxis.PixelPositionToValue(XMax));
ptrYAxis.ScaleView.Zoom(ptrYAxis.PixelPositionToValue(YMin), ptrYAxis.PixelPositionToValue(YMax));
DialogResult = DialogResult.OK;
}
/// <summary>
/// Converts an axis value to an absolute coordinate along an axis.
/// Measured in pixels.
/// This method only works in paint events.
/// </summary>
/// <param name="axisValue">
/// The axis value.
/// </param>
/// <returns>
/// A double value that represents the pixel position.
/// </returns>
public double ValueToPixelPosition(double axisValue)
{
return(axis.ValueToPixelPosition(axisValue));
}
