using System;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using Microsoft.Drawing;
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namespace Microsoft.Windows.Forms
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{
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public static partial class RenderEngine
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{
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/// <summary>
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/// 获取线段与水平X轴夹角(角度表示)
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/// </summary>
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/// <param name="pt1">起点</param>
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/// <param name="pt2">终点</param>
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/// <returns>夹角</returns>
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public static float GetLineDegrees(Point pt1, Point pt2)
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{
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return (float)MathEx.ToDegrees(Math.Atan(((double)pt2.Y - (double)pt1.Y) / ((double)pt2.X - (double)pt1.X)));
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}
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/// <summary>
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/// 获取包含线段的最小矩形(非空)
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/// </summary>
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/// <param name="pt1">起点</param>
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/// <param name="pt2">终点</param>
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/// <returns>矩形</returns>
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public static Rectangle GetLineRect(Point pt1, Point pt2)
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{
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Rectangle rect = Rectangle.FromLTRB(Math.Min(pt1.X, pt2.X), Math.Min(pt1.Y, pt2.Y), Math.Max(pt1.X, pt2.X), Math.Max(pt1.Y, pt2.Y));
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rect.Inflate(1, 1);
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return rect;
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}
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/// <summary>
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/// 创建画刷,渲染背景和边框使用
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/// </summary>
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/// <param name="rect">画刷区域</param>
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/// <param name="baseColor">基色</param>
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/// <param name="pos1">基色位置1</param>
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/// <param name="pos2">基色位置2</param>
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/// <param name="reverse">是否反转</param>
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/// <param name="mode">渐变模式</param>
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/// <param name="style">样式</param>
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/// <returns>画刷</returns>
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public static Brush CreateBrush(Rectangle rect, Color baseColor, float pos1, float pos2, bool reverse, LinearGradientMode mode, BlendStyle style)
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{
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Brush brush = null;
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RectangleEx.MakeNotEmpty(ref rect);
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switch (style)
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{
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case BlendStyle.Solid:
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{
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SolidBrush brushTmp = new SolidBrush(baseColor);
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brush = brushTmp;
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brushTmp = null;
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}
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break;
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case BlendStyle.Gradient:
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{
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LinearGradientBrush brushTmp = new LinearGradientBrush(rect, Color.Empty, Color.Empty, mode);
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//画刷设置
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ColorBlend blendTmp = new ColorBlend();
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Color[] colors;
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float[] positions;
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RenderEngine.GetColorPosGradient(baseColor, pos1, pos2, reverse, false, out colors, out positions);
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blendTmp.Colors = colors;
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blendTmp.Positions = positions;
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//
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brushTmp.InterpolationColors = blendTmp;
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brush = brushTmp;
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brushTmp = null;
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}
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break;
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case BlendStyle.FadeIn:
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{
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LinearGradientBrush brushTmp = new LinearGradientBrush(rect, Color.Empty, Color.Empty, mode);
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//画刷设置
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ColorBlend blendTmp = new ColorBlend();
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Color[] colors;
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float[] positions;
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RenderEngine.GetColorPosFadeIn(baseColor, pos1, pos2, reverse, false, out colors, out positions);
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blendTmp.Colors = colors;
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blendTmp.Positions = positions;
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//
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brushTmp.InterpolationColors = blendTmp;
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brush = brushTmp;
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brushTmp = null;
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}
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break;
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case BlendStyle.FadeOut:
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{
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LinearGradientBrush brushTmp = new LinearGradientBrush(rect, Color.Empty, Color.Empty, mode);
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//画刷设置
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ColorBlend blendTmp = new ColorBlend();
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Color[] colors;
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float[] positions;
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RenderEngine.GetColorPosFadeOut(baseColor, pos1, pos2, reverse, false, out colors, out positions);
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blendTmp.Colors = colors;
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blendTmp.Positions = positions;
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//
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brushTmp.InterpolationColors = blendTmp;
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brush = brushTmp;
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brushTmp = null;
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}
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break;
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case BlendStyle.FadeInFadeOut:
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{
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LinearGradientBrush brushTmp = new LinearGradientBrush(rect, Color.Empty, Color.Empty, mode);
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//画刷设置
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ColorBlend blendTmp = new ColorBlend();
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Color[] colors;
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float[] positions;
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RenderEngine.GetColorPosFadeInFadeOut(baseColor, pos1, pos2, reverse, false, out colors, out positions);
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blendTmp.Colors = colors;
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blendTmp.Positions = positions;
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//
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brushTmp.InterpolationColors = blendTmp;
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brush = brushTmp;
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brushTmp = null;
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}
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break;
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default:
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break;
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}
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return brush;
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}
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/// <summary>
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/// 创建画刷,渲染线段使用
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/// </summary>
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/// <param name="pt1">起点</param>
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/// <param name="pt2">终点</param>
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/// <param name="baseColor">基色</param>
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/// <param name="style">样式</param>
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/// <returns>画刷</returns>
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public static Brush CreateBrush(Point pt1, Point pt2, Color baseColor, BlendStyle style)
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{
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Brush brush = null;
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switch (style)
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{
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case BlendStyle.Solid:
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{
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SolidBrush brushTmp = new SolidBrush(baseColor);
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brush = brushTmp;
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brushTmp = null;
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}
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break;
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case BlendStyle.Gradient:
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{
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LinearGradientBrush brushTmp = new LinearGradientBrush(GetLineRect(pt1, pt2), Color.Empty, Color.Empty, GetLineDegrees(pt1, pt2));
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//画刷设置
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ColorBlend blendTmp = new ColorBlend();
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Color[] colors;
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float[] positions;
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RenderEngine.GetColorPosGradient(baseColor, float.NaN, float.NaN, false, true, out colors, out positions);
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blendTmp.Colors = colors;
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blendTmp.Positions = positions;
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//
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brushTmp.InterpolationColors = blendTmp;
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brush = brushTmp;
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brushTmp = null;
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}
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break;
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case BlendStyle.FadeIn:
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{
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LinearGradientBrush brushTmp = new LinearGradientBrush(GetLineRect(pt1, pt2), Color.Empty, Color.Empty, GetLineDegrees(pt1, pt2));
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//画刷设置
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ColorBlend blendTmp = new ColorBlend();
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Color[] colors;
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float[] positions;
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RenderEngine.GetColorPosFadeIn(baseColor, float.NaN, float.NaN, false, true, out colors, out positions);
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blendTmp.Colors = colors;
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blendTmp.Positions = positions;
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//
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brushTmp.InterpolationColors = blendTmp;
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brush = brushTmp;
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brushTmp = null;
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}
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break;
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case BlendStyle.FadeOut:
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{
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LinearGradientBrush brushTmp = new LinearGradientBrush(GetLineRect(pt1, pt2), Color.Empty, Color.Empty, GetLineDegrees(pt1, pt2));
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//画刷设置
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ColorBlend blendTmp = new ColorBlend();
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Color[] colors;
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float[] positions;
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RenderEngine.GetColorPosFadeOut(baseColor, float.NaN, float.NaN, false, true, out colors, out positions);
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blendTmp.Colors = colors;
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blendTmp.Positions = positions;
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//
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brushTmp.InterpolationColors = blendTmp;
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brush = brushTmp;
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brushTmp = null;
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}
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break;
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case BlendStyle.FadeInFadeOut:
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{
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LinearGradientBrush brushTmp = new LinearGradientBrush(GetLineRect(pt1, pt2), Color.Empty, Color.Empty, GetLineDegrees(pt1, pt2));
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//画刷设置
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ColorBlend blendTmp = new ColorBlend();
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Color[] colors;
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float[] positions;
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RenderEngine.GetColorPosFadeInFadeOut(baseColor, float.NaN, float.NaN, false, true, out colors, out positions);
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blendTmp.Colors = colors;
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blendTmp.Positions = positions;
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//
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brushTmp.InterpolationColors = blendTmp;
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brush = brushTmp;
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brushTmp = null;
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}
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break;
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default:
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break;
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}
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return brush;
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}
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/// <summary>
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/// 创建画笔
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/// </summary>
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/// <param name="brush">画刷</param>
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/// <param name="width">直线宽度</param>
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/// <param name="style">虚线样式</param>
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/// <param name="pattern">点线长度数组</param>
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/// <param name="cap">每个线段键帽样式</param>
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/// <param name="offset">直线的起点到短划线图案起始处的距离</param>
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/// <returns>画笔</returns>
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public static Pen CreatePen(Brush brush, int width, DashStyle style, float[] pattern, DashCap cap, float offset)
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{
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Pen pen = new Pen(brush);
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pen.Width = width;
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pen.DashStyle = style;
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if (style == DashStyle.Custom && pattern != null && pattern.Length > 0)
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pen.DashPattern = pattern;
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pen.DashCap = cap;
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pen.DashOffset = offset;
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return pen;
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}
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}
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}
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