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<DT>基于VC.NET的GDI+編程入門之畫刷
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作者:劉濤 2005-12-03 來源:天極網 瀏覽:<SPAN id=count></SPAN> </DIV>
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<DD class=ArticleContent> （二）網格畫刷<BR><BR> 網格畫刷根據已畫或已<A
href="http://www.baidu.com/baidu?tn=jkday2000&word=設計"
target=_blank>設計</A>的模式來設置它的填充類型。為了支持網格畫刷，.NET框架提供了畫刷可以使用的各種模式，這些預先設計的模式對應于網格畫刷的類型。這意味著在使用網格畫刷時，必須在可用的各種類型中選擇想要使用的模式，為了使填充區域更生動，還需要說明所使用的顏色。<BR><BR> 為了獲取一個網格畫刷，可以使用HatchBrush類，它的其中一個構造函數使用以下語法：<BR><BR>
<TABLE borderColor=#ffcc66 width="90%" align=center bgColor=#dadacf
border=1><TBODY>
<TR>
<TD>public: HatchBrush(HatchStyle style, Color
foreColor);</TD></TR></TBODY></TABLE><BR> 參數foreColor是用來繪制模式的顏色，style參數是想使用的網格類型，一些可用的類型是：<BR><BR>
<TABLE borderColor=#ffcc66 width="90%" align=center bgColor=#dadacf
border=1><TBODY>
<TR>
<TD>private: System::Void Form1_Paint(System::Object * sender,
<BR>System::Windows::Forms::PaintEventArgs * e)<BR>{<BR>using namespace
System::Drawing::Drawing2D;<BR>HatchBrush *brushBackDiag = new
HatchBrush(HatchStyle::BackwardDiagonal, <BR>Color::FromArgb(0, 0,
255));<BR>HatchBrush *brushCross = new HatchBrush(HatchStyle::Cross,
<BR>Color::FromArgb(200, 0, 0));<BR>HatchBrush *brushDarkDown = <BR>new
HatchBrush(HatchStyle::DarkDownwardDiagonal,
Color::Salmon);<BR>HatchBrush *brushDarkHorz = new
HatchBrush(HatchStyle::DarkHorizontal,<BR>Color::Navy);<BR>HatchBrush
*brushDarkUpDiag = new HatchBrush(HatchStyle::DarkUpwardDiagonal,
<BR>Color::Pink);<BR>HatchBrush *brushVertical = new
HatchBrush(HatchStyle::DarkVertical, <BR>Color::FromArgb(255, 0,
255));<BR>HatchBrush *brushDashDnDiag = new
HatchBrush(<BR>HatchStyle::DashedDownwardDiagonal, Color::FromArgb(255,
128, 0));<BR>HatchBrush *brushDashHorz = new
HatchBrush(HatchStyle::DashedHorizontal, <BR>Color::FromArgb(0, 128,
192));<BR>HatchBrush *brushDashUpDiag = new
<BR>HatchBrush(HatchStyle::DashedUpwardDiagonal,
Color::Green);<BR>HatchBrush *brushDashVert = new
HatchBrush(HatchStyle::DashedVertical,
<BR>Color::Firebrick);<BR>HatchBrush *brushDiagBrisk = new
HatchBrush(HatchStyle::DiagonalBrick,<BR>Color::Fuchsia);<BR>HatchBrush
*brushDiagCross = new HatchBrush(HatchStyle::DiagonalCross,
<BR>Color::Moccasin);<BR>HatchBrush *brushDivot = new
HatchBrush(HatchStyle::Divot, <BR>Color::Goldenrod);<BR>HatchBrush
*brushDotDiamond = new HatchBrush(HatchStyle::DottedDiamond,
<BR>Color::Gainsboro);<BR>HatchBrush *brushDottedGrid = new
HatchBrush(HatchStyle::DottedGrid,<BR>Color::Khaki);<BR>HatchBrush
*brushForDiag = new HatchBrush(HatchStyle::ForwardDiagonal,
<BR>Color::Maroon);<BR>HatchBrush *brushHorz = new
HatchBrush(HatchStyle::Horizontal, <BR>Color::Red);<BR>HatchBrush
*brushHorzBrick = new
HatchBrush(HatchStyle::HorizontalBrick,<BR>Color::SaddleBrown);<BR>HatchBrush
*brushLgChkBoard = new HatchBrush(HatchStyle::LargeCheckerBoard,
<BR>Color::RoyalBlue);<BR>HatchBrush *brushLgConfetti = new
HatchBrush(HatchStyle::LargeConfetti,
<BR>Color::MistyRose);<BR>HatchBrush *brushLgGrid = new
HatchBrush(HatchStyle::LargeGrid, <BR>Color::Purple);<BR>HatchBrush
*brushLtDnDiag = new HatchBrush(<BR>HatchStyle::LightDownwardDiagonal,
Color::DarkCyan);<BR>HatchBrush *brushLtHorz = new
HatchBrush(HatchStyle::LightHorizontal,<BR>Color::PowderBlue);<BR>HatchBrush
*brushUpDiag = new HatchBrush(<BR>HatchStyle::LightUpwardDiagonal,
Color::SeaGreen);<BR>HatchBrush *brushLtVert = new
HatchBrush(HatchStyle::LightVertical,<BR>Color::Olive);<BR>e->Graphics->FillRectangle(brushBackDiag,
20, 20, 80, 60);<BR>e->Graphics->FillRectangle(brushCross, 120,
20, 80, 60);<BR>e->Graphics->FillRectangle(brushDarkDown, 220, 20,
80, 60);<BR>e->Graphics->FillRectangle(brushDarkHorz, 320, 20, 80,
60);<BR>e->Graphics->FillRectangle(brushDarkUpDiag, 420, 20, 80,
60);<BR><BR>e->Graphics->FillRectangle(brushVertical, 20, 100, 80,
60);<BR>e->Graphics->FillRectangle(brushDashDnDiag, 120, 100, 80,
60);<BR>e->Graphics->FillRectangle(brushDashHorz, 220, 100, 80,
60);<BR>e->Graphics->FillRectangle(brushDashUpDiag, 320, 100, 80,
60);<BR>e->Graphics->FillRectangle(brushDashVert, 420, 100, 80,
60);<BR><BR>e->Graphics->FillRectangle(brushDashVert, 20, 180, 80,
60);<BR>e->Graphics->FillRectangle(brushDiagBrisk, 120, 180, 80,
60);<BR>e->Graphics->FillRectangle(brushDiagCross, 220, 180, 80,
60);<BR>e->Graphics->FillRectangle(brushDivot, 320, 180, 80,
60);<BR>e->Graphics->FillRectangle(brushDotDiamond, 420, 180, 80,
60);<BR><BR>e->Graphics->FillRectangle(brushDottedGrid, 20, 260,
80, 60);<BR>e->Graphics->FillRectangle(brushForDiag, 120, 260, 80,
60);<BR>e->Graphics->FillRectangle(brushHorz, 220, 260, 80,
60);<BR>e->Graphics->FillRectangle(brushHorzBrick, 320, 260, 80,
60);<BR>e->Graphics->FillRectangle(brushLgChkBoard, 420, 260, 80,
60);<BR><BR>e->Graphics->FillRectangle(brushLgGrid, 20, 340, 80,
60);<BR>e->Graphics->FillRectangle(brushLtDnDiag, 120, 340, 80,
60);<BR>e->Graphics->FillRectangle(brushLtHorz, 220, 340, 80,
60);<BR>e->Graphics->FillRectangle(brushUpDiag, 320, 340, 80,
60);<BR>e->Graphics->FillRectangle(brushLtVert, 420, 340, 80,
60);<BR>}</TD></TR></TBODY></TABLE><BR>
<TABLE width="90%" align=center border=0>
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<TR>
<TD>
<DIV align=center><IMG hspace=3
src="基于VC_NET的GDI+編程入門之畫刷 _2.files/20051203ig390_3.gif" align=center
vspace=1 border=1
;?><BR>圖三、各種網絡格畫刷效果圖</DIV></TD></TR></TBODY></TABLE><BR> 如果使用上面的構造函數來填充一個圖形，選擇的模式將繪制在黑色背景上，如果想使用不同的背景，使用下面的構造函數來初始化畫刷。<BR><BR>
<TABLE borderColor=#ffcc66 width="90%" align=center bgColor=#dadacf
border=1><TBODY>
<TR>
<TD>public: HatchBrush(HatchStyle hatchstyle, Color foreColor, Color
backColor);</TD></TR></TBODY></TABLE><BR> 參數backColor是將用于背景的顏色。<BR><BR> 任何時候，為了得到繪制模式的顏色，可以操作畫刷的ForegroundColor屬性；為了了解背景顏色，可以操作畫刷的BackgroundColor屬性；為了知道當前畫刷的類型，可以操作它的HatchStyle類型。<BR><BR>
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