* UILineChart：增加鼠标框选放大，可多次放大，右键点击恢复一次，双击恢复默认
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@ -17,6 +17,7 @@
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* 创建日期: 2020-10-01
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*
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* 2020-10-01: V2.2.8 完成曲线图表
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* 2021-04-06: V3.0.2 增加鼠标框选放大，可多次放大，右键点击恢复一次，双击恢复默认
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******************************************************************************/
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using System;
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@ -272,13 +273,32 @@ namespace Sunny.UI
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}
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SizeF sfName = g.MeasureString(Option.YAxis.Name, SubFont);
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int xx = (int)(DrawOrigin.X - Option.YAxis.AxisTick.Length - widthMax - sfName.Height);
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int yy = (int)(Option.Grid.Top + (DrawSize.Height - sfName.Width) / 2);
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g.DrawString(Option.YAxis.Name, SubFont, ChartStyle.ForeColor, new Point(xx, yy),
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new StringFormat() { Alignment = StringAlignment.Center }, 270);
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float xx = DrawOrigin.X - Option.YAxis.AxisTick.Length - widthMax - sfName.Width;
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float yy = Option.Grid.Top + (DrawSize.Height - sfName.Height) / 2.0f;
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DrawStringRotateAtCenter(g, Option.YAxis.Name, SubFont, ChartStyle.ForeColor, new PointF(xx + sfName.Width / 2.0f, yy + sfName.Height / 2.0f), 270);
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}
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}
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public void DrawStringRotateAtCenter(Graphics graphics, string text, Font font, Color color, PointF centerPoint, int angle)
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{
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SizeF sf = graphics.MeasureString(text, font);
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float x1 = centerPoint.X - sf.Width / 2.0f;
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float y1 = centerPoint.Y - sf.Height / 2.0f;
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// 把画板的原点(默认是左上角)定位移到文字中心
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graphics.TranslateTransform(x1 + sf.Width / 2, y1 + sf.Height / 2);
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// 旋转画板
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graphics.RotateTransform(angle);
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// 回退画板x,y轴移动过的距离
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graphics.TranslateTransform(-(x1 + sf.Width / 2), -(y1 + sf.Height / 2));
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graphics.DrawString(text, font, new SolidBrush(Color.Black), x1, y1);
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//恢复
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graphics.TranslateTransform(x1 + sf.Width / 2, y1 + sf.Height / 2);
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graphics.RotateTransform(-angle);
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graphics.TranslateTransform(-(x1 + sf.Width / 2), -(y1 + sf.Height / 2));
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}
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protected virtual void DrawSeries(Graphics g, Color color, UILineSeries series)
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{
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if (series.Points.Count == 0)
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@ -669,13 +689,18 @@ namespace Sunny.UI
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protected override void OnMouseDown(MouseEventArgs e)
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{
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base.OnMouseDown(e);
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if (IsZoom) return;
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if (e.Button == MouseButtons.Left && e.X > Option.Grid.Left && e.X < Width - Option.Grid.Right &&
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e.Y > Option.Grid.Top && e.Y < Height - Option.Grid.Bottom)
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{
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IsMouseDown = true;
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StartPoint = StopPoint = e.Location;
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}
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if (e.Button == MouseButtons.Right)
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{
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ZoomBack();
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}
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}
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protected override void OnMouseUp(MouseEventArgs e)
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@ -690,56 +715,104 @@ namespace Sunny.UI
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}
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private bool IsZoom;
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private bool XMinAuto, XMaxAuto, YMinAuto, YMaxAuto;
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private double XMin, XMax, YMin, YMax;
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private readonly List<ZoomArea> ZoomAreas = new List<ZoomArea>();
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private ZoomArea BaseArea;
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private void CreateBaseArea()
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{
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IsZoom = true;
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if (BaseArea == null)
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{
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BaseArea = new ZoomArea();
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BaseArea.XMin = XScale.Min;
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BaseArea.XMax = XScale.Max;
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BaseArea.YMin = YScale.Min;
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BaseArea.YMax = YScale.Max;
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BaseArea.XMinAuto = Option.XAxis.MinAuto;
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BaseArea.XMaxAuto = Option.XAxis.MaxAuto;
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BaseArea.YMinAuto = Option.YAxis.MinAuto;
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BaseArea.YMaxAuto = Option.YAxis.MaxAuto;
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}
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}
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private void Zoom()
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{
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if (Math.Abs(StartPoint.X - StopPoint.X) < 10 || Math.Abs(StartPoint.Y - StopPoint.Y) < 10) return;
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if (Math.Abs(StartPoint.X - StopPoint.X) < 6 && Math.Abs(StartPoint.Y - StopPoint.Y) < 6) return;
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IsZoom = true;
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CreateBaseArea();
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XMin = Option.XAxis.Min;
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XMax = Option.XAxis.Max;
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YMin = Option.YAxis.Min;
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YMax = Option.YAxis.Max;
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XMinAuto = Option.XAxis.MinAuto;
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XMaxAuto = Option.XAxis.MaxAuto;
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YMinAuto = Option.YAxis.MinAuto;
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YMaxAuto = Option.YAxis.MaxAuto;
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var zoomArea = new ZoomArea();
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zoomArea.XMin = XScale.CalcXPos(Math.Min(StartPoint.X, StopPoint.X), DrawOrigin.X, DrawSize.Width);
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zoomArea.XMax = XScale.CalcXPos(Math.Max(StartPoint.X, StopPoint.X), DrawOrigin.X, DrawSize.Width);
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zoomArea.YMax = YScale.CalcYPos(Math.Min(StartPoint.Y, StopPoint.Y), DrawOrigin.Y, DrawSize.Height);
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zoomArea.YMin = YScale.CalcYPos(Math.Max(StartPoint.Y, StopPoint.Y), DrawOrigin.Y, DrawSize.Height);
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AddZoomArea(zoomArea);
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}
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public const double MinInterval = 0.000005;
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public const double MaxInterval = int.MaxValue;
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private void AddZoomArea(ZoomArea zoomArea)
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{
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if (zoomArea.XMax - zoomArea.XMin <= MinInterval) return;
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if (zoomArea.YMax - zoomArea.YMin <= MinInterval) return;
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if (zoomArea.XMax - zoomArea.XMin >= MaxInterval) return;
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if (zoomArea.YMax - zoomArea.YMin >= MaxInterval) return;
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ZoomAreas.Add(zoomArea);
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Zoom(zoomArea);
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}
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private void Zoom(ZoomArea zoomArea)
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{
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Option.XAxis.Min = zoomArea.XMin;
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Option.XAxis.Max = zoomArea.XMax;
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Option.YAxis.Max = zoomArea.YMax;
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Option.YAxis.Min = zoomArea.YMin;
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Option.XAxis.MinAuto = zoomArea.XMinAuto;
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Option.XAxis.MaxAuto = zoomArea.XMaxAuto;
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Option.YAxis.MinAuto = zoomArea.YMinAuto;
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Option.YAxis.MaxAuto = zoomArea.YMaxAuto;
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double xmin = XScale.CalcXPos(Math.Min(StartPoint.X, StopPoint.X), DrawOrigin.X, DrawSize.Width);
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double xmax = XScale.CalcXPos(Math.Max(StartPoint.X, StopPoint.X), DrawOrigin.X, DrawSize.Width);
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double ymax = YScale.CalcYPos(Math.Min(StartPoint.Y, StopPoint.Y), DrawOrigin.Y, DrawSize.Height);
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double ymin = YScale.CalcYPos(Math.Max(StartPoint.Y, StopPoint.Y), DrawOrigin.Y, DrawSize.Height);
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Option.XAxis.Min = xmin;
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Option.XAxis.Max = xmax;
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Option.YAxis.Min = ymin;
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Option.YAxis.Max = ymax;
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Option.XAxis.MinAuto = false;
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Option.XAxis.MaxAuto = false;
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Option.YAxis.MinAuto = false;
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Option.YAxis.MaxAuto = false;
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CalcData();
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Invalidate();
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}
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private void ZoomNormal()
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public void ZoomNormal()
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{
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IsZoom = false;
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if (!IsZoom) return;
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Option.XAxis.Min = XMin;
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Option.XAxis.Max = XMax;
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Option.YAxis.Min = YMin;
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Option.YAxis.Max = YMax;
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Option.XAxis.MinAuto = XMinAuto;
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Option.XAxis.MaxAuto = XMaxAuto;
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Option.YAxis.MinAuto = YMinAuto;
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Option.YAxis.MaxAuto = YMaxAuto;
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IsZoom = false;
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Option.XAxis.Min = BaseArea.XMin;
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Option.XAxis.Max = BaseArea.XMax;
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Option.YAxis.Min = BaseArea.YMin;
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Option.YAxis.Max = BaseArea.YMax;
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Option.XAxis.MinAuto = BaseArea.XMinAuto;
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Option.XAxis.MaxAuto = BaseArea.XMaxAuto;
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Option.YAxis.MinAuto = BaseArea.YMinAuto;
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Option.YAxis.MaxAuto = BaseArea.YMaxAuto;
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BaseArea = null;
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CalcData();
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Invalidate();
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}
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private void ZoomBack()
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{
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if (!IsZoom) return;
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if (ZoomAreas.Count > 1)
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{
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ZoomAreas.RemoveAt(ZoomAreas.Count - 1);
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Zoom(ZoomAreas[ZoomAreas.Count - 1]);
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}
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else
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{
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ZoomAreas.Clear();
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ZoomNormal();
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}
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}
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protected override void OnMouseLeave(EventArgs e)
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{
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base.OnMouseLeave(e);
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@ -764,13 +837,10 @@ namespace Sunny.UI
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}
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}
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protected override void OnMouseClick(MouseEventArgs e)
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protected override void OnMouseDoubleClick(MouseEventArgs e)
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{
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base.OnMouseClick(e);
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if (IsZoom)
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{
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ZoomNormal();
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}
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base.OnMouseDoubleClick(e);
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if (e.Button == MouseButtons.Left) ZoomNormal();
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}
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}
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}
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@ -185,5 +185,24 @@ namespace Sunny.UI
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}
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}
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public class ZoomArea
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{
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public bool XMinAuto { get; set; }
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public bool XMaxAuto { get; set; }
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public bool YMinAuto { get; set; }
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public bool YMaxAuto { get; set; }
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public bool Y2MinAuto { get; set; }
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public bool Y2MaxAuto { get; set; }
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public double XMin { get; set; }
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public double XMax { get; set; }
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public double YMin { get; set; }
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public double YMax { get; set; }
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public double Y2Min { get; set; }
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public double Y2Max { get; set; }
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public double XRange => XMax - XMin;
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public double YRange => YMax - YMin;
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public double Y2Range => Y2Max - Y2Min;
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}
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}
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