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谢谢!
下面我提供了一些示例代码来回答您的问题。我对 3 和 4 的回答是基本示例,您必须计算正确的值以在应用程序中进行绘制和缩放。
private void button1_Click(object sender, EventArgs e)
{
setupChart();
}
private void setupChart()
{
// 1.
foreach (System.Windows.Forms.DataVisualization.Charting.Legend legend in chart1.Legends)
legend.Enabled = false;
// 2.
chart1.Series[0].BorderWidth = 5;
chart1.ChartAreas[0].AxisX.MajorGrid.Enabled = false;
chart1.ChartAreas[0].AxisY.MajorGrid.Enabled = false;
// 3.
chart1.Paint += new PaintEventHandler(chart1_Paint);
// 4.
chart1.MouseWheel += new MouseEventHandler(chart1_MouseWheel);
//chart must have focus for MouseWheel event to fire
chart1.Focus();
}
private void chart1_Paint(object sender, PaintEventArgs e)
{
//basic example of painting
//determine size of area to paint
Size areaSize = new Size(50, 50);
//determine location to paint
Point point = new Point(100, 450);
e.Graphics.FillRectangle(new SolidBrush(Color.Gray),
point.X, point.Y, areaSize.Width, areaSize.Height);
}
private void chart1_MouseWheel(object sender, MouseEventArgs e)
{
//basic example of zooming in and out
if (e.Delta > 0)
{
chart1.ChartAreas[0].AxisX.ScaleView.Zoom(
chart1.ChartAreas[0].AxisX.ScaleView.ViewMinimum / 2,
chart1.ChartAreas[0].AxisX.ScaleView.ViewMaximum / 2);
chart1.ChartAreas[0].AxisY.ScaleView.Zoom(
chart1.ChartAreas[0].AxisY.ScaleView.ViewMinimum / 2,
chart1.ChartAreas[0].AxisY.ScaleView.ViewMaximum / 2);
}
else
{
if (chart1.ChartAreas[0].AxisX.ScaleView.ViewMaximum <
chart1.ChartAreas[0].AxisX.Maximum ||
chart1.ChartAreas[0].AxisX.ScaleView.ViewMinimum >
chart1.ChartAreas[0].AxisX.Minimum)
{
chart1.ChartAreas[0].AxisX.ScaleView.Zoom(
chart1.ChartAreas[0].AxisX.ScaleView.ViewMinimum * 2,
chart1.ChartAreas[0].AxisX.ScaleView.ViewMaximum * 2);
chart1.ChartAreas[0].AxisY.ScaleView.Zoom(
chart1.ChartAreas[0].AxisY.ScaleView.ViewMinimum * 2,
chart1.ChartAreas[0].AxisY.ScaleView.ViewMaximum * 2);
}
else
{
chart1.ChartAreas[0].AxisX.ScaleView.ZoomReset();
chart1.ChartAreas[0].AxisY.ScaleView.ZoomReset();
}
}
}