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Add support for different FormBorderStyles
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117
StylableWinFormsControls/StylableWinFormsControls/Utilities/CustomFormBorderStyleHandler.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,117 @@ | ||
| using StylableWinFormsControls.Controls; | ||
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| namespace StylableWinFormsControls.Utilities | ||
| { | ||
| /// <summary> | ||
| /// provides drawing logic for borders on a form | ||
| /// </summary> | ||
| internal static class CustomFormBorderStyleHandler | ||
| { | ||
| /// <summary> | ||
| /// As the drawing is called often, we do not want to create the Brush every time so we cache them | ||
| /// </summary> | ||
| private static readonly Dictionary<Color, Brush> BRUSH_CACHE = new Dictionary<Color, Brush>(); | ||
|
|
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| /// <summary> | ||
| /// draw a border | ||
| /// </summary> | ||
| /// <param name="g">the graphics object to draw on</param> | ||
| /// <param name="borderColor">the default color for the border. may be changed slightly (e.g. for 3D effects)</param> | ||
| /// <param name="f">the form to get the settings from</param> | ||
| public static void DrawBorder(this Graphics g, Color borderColor, Form f) | ||
| { | ||
| g.DrawBorder(borderColor, f.FormBorderStyle, topOffset: f.GetTitleBarHeight()); | ||
| } | ||
|
|
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| /// <summary> | ||
| /// draw a border | ||
| /// </summary> | ||
| /// <param name="g">the graphics object to draw on</param> | ||
| /// <param name="f">the form to get the settings from</param> | ||
| public static void DrawBorder(this Graphics g, StylableMdiChildForm f) | ||
| { | ||
| g.DrawBorder(f.BorderColor, f); | ||
| } | ||
|
|
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| /// <summary> | ||
| /// draw a border | ||
| /// </summary> | ||
| /// <param name="g">the graphics object to draw on</param> | ||
| /// <param name="borderColor">the default color for the border. may be changed slightly (e.g. for 3D effects)</param> | ||
| /// <param name="style">the Border Style</param> | ||
| /// <param name="topOffset">offset at the top. Can be used to allow space for a title bar</param> | ||
| /// <param name="bottomOffset">offset at the bottom</param> | ||
| /// <param name="leftOffset">offset at the left</param> | ||
| /// <param name="rightOffset">offset at the right</param> | ||
| public static void DrawBorder(this Graphics g, Color borderColor, FormBorderStyle style, int topOffset = 0, int bottomOffset = 0, int leftOffset = 0, int rightOffset = 0) | ||
| { | ||
| switch (style) | ||
| { | ||
| case FormBorderStyle.Fixed3D: | ||
| //TODO: Implement | ||
| case FormBorderStyle.Sizable: | ||
| case FormBorderStyle.SizableToolWindow: | ||
| case FormBorderStyle.FixedDialog: | ||
| case FormBorderStyle.FixedToolWindow: | ||
| case FormBorderStyle.FixedSingle: | ||
| DrawSimpleBorder(g, borderColor, topOffset, bottomOffset, leftOffset, rightOffset); | ||
| break; | ||
|
|
||
| case FormBorderStyle.None: | ||
| //no border | ||
| break; | ||
| } | ||
| } | ||
|
|
||
| /// <summary> | ||
| /// returns a SolidBrush for the given Color | ||
| /// </summary> | ||
| /// <param name="c"></param> | ||
| /// <returns></returns> | ||
| public static Brush GetBrush(this Color c) | ||
| { | ||
| if (BRUSH_CACHE.ContainsKey(c)) | ||
| { | ||
| return BRUSH_CACHE[c]; | ||
| } | ||
| var brush = new SolidBrush(c); | ||
| BRUSH_CACHE.Add(c, brush); | ||
| return brush; | ||
| } | ||
|
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| private static void DrawSimpleBorder(Graphics g, Color borderColor, int topOffset, int bottomOffset, int leftOffset, int rightOffset) | ||
| { | ||
| int totalHeight = (int)g.VisibleClipBounds.Height; | ||
| int totalWidth = (int)g.VisibleClipBounds.Width; | ||
| int borderWidth = 8; | ||
| var borderBrush = borderColor.GetBrush(); | ||
| //draw left border | ||
| g.FillRectangle(borderBrush, leftOffset, topOffset, borderWidth, totalHeight - topOffset - bottomOffset); | ||
| //draw bottom border | ||
| g.FillRectangle(borderBrush, leftOffset, totalHeight - bottomOffset - borderWidth, totalWidth - leftOffset - rightOffset, borderWidth); | ||
| //draw right border | ||
| g.FillRectangle(borderBrush, totalWidth - rightOffset - borderWidth, topOffset, borderWidth, totalHeight - topOffset - bottomOffset); | ||
| } | ||
|
|
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| /// <summary> | ||
| /// calculates the current border width on a form | ||
| /// </summary> | ||
| /// <param name="f">the form</param> | ||
| /// <returns></returns> | ||
| public static int GetBorderWidth(this Form f) | ||
| { | ||
| //setting the border style will update width and client size so we can calculate the width easily | ||
| return (f.Width - f.ClientSize.Width) / 2; | ||
| } | ||
|
|
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| /// <summary> | ||
| /// calculates the height of the titlebar | ||
| /// </summary> | ||
| /// <param name="f">the form</param> | ||
| /// <returns></returns> | ||
| public static int GetTitleBarHeight(this Form f) | ||
| { | ||
| return f.Height - f.ClientSize.Height - f.GetBorderWidth(); | ||
| } | ||
| } | ||
| } |