/// <summary>
/// 画线
/// </summary>
/// <param name="graphics"></param>
private void DrawLine(Graphics graphics)
{
try
{
graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
//字体
System.Drawing.Font font = new Font(FontFamily.GenericSansSerif, 20f);
this.ReDraw();
Domain.GraphicsPointData graphicsPointData = new Domain.GraphicsPointData()
{
Tool = DrawTool.Line,
X = this.startX,
Y = this.startY,
EndX = this.endX,
EndY = this.endY,
Color = brushColor,
BrushWidth = 2,
};
this.graphicsPath.Add(graphicsPointData);
//起止坐标点
PointF point1 = new PointF(this.startX, this.startY);
PointF point2 = new PointF(this.endX, this.endY);
//笔刷
{
using (Pen pen = new Pen(this.brushColor, 2))
{
graphics.DrawLine(pen, point1, point2);
}
}
this.pboxContainer.Image = image;
}
catch (OutOfMemoryException ex)
{
MessageBox.Show(ex.Message);
}
}
/// <summary>
/// 橡皮擦
/// </summary>
private void Eraser(float x, float y, float w, float h)
{
if (graphics != null)
{
Domain.GraphicsPointData graphicsPointData = new Domain.GraphicsPointData()
{
Tool = DrawTool.Eraser,
X = x,
Y = y,
EndX = x + w,
EndY = y + h,
Color = brushColor,
BrushWidth = 2,
Width = 15,
Height = 15,
};
this.graphicsPath.Add(graphicsPointData);
graphics.CompositingMode = CompositingMode.SourceCopy;
SolidBrush solidBrush = new SolidBrush(Color.Transparent);
graphics.FillRectangle(solidBrush, new RectangleF(x, y, w, h));
this.pboxContainer.Image = image;
}
}
/// <summary>
/// 重绘
/// </summary>
private void ReDraw()
{
foreach (var item in graphicsPath)
{
using (Pen pen = new Pen(item.Color, item.BrushWidth))
{
switch (item.Tool)
{
//线条 Domain.GraphicsPointData
case DrawTool.Line:
Domain.GraphicsPointData graphicsPointData = (Domain.GraphicsPointData)item;
graphics.DrawLine(pen, graphicsPointData.X, graphicsPointData.Y, graphicsPointData.EndX, graphicsPointData.EndY);
break;
//椭圆
case DrawTool.Eclips:
graphics.DrawEllipse(pen, item.X, item.Y, item.Width, item.Height);
break;
//矩形
case DrawTool.Rectangle:
graphics.DrawRectangle(pen, item.X, item.Y, item.Width, item.Height);
break;
//橡皮擦
case DrawTool.Eraser:
graphics.CompositingMode = CompositingMode.SourceCopy;
SolidBrush solidBrush = new SolidBrush(Color.Transparent);
graphics.FillRectangle(solidBrush, new RectangleF(item.X, item.Y, item.Width, item.Height));
this.pboxContainer.Image = image;
break;
}
pen.Dispose();
}
}
}
