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<title>CRoundRect类别定义及实作 画圆矩形的类别</title>
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<p><small><a href="../../../index.htm">首页</a> >> <a href="../../program.htm">程序设计</a>
>> <a href="../cbuilder.htm">C++ Builder</a> >> </small><font>具体而微的绘图程式</font>·CRoundRect类别定义及实作
画圆矩形的类别</p>
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</font><p><font SIZE="2"></font><font color="#FF0000" SIZE="2">·03-06 CRoundRect类别定义及实作
画圆矩形的类别</font></p><font SIZE="2">
<p>class CRoundRect : public CShape</p>
<p>{</p>
<p> public:</p>
<p> POINT m_ptMove;</p>
<p> POINT m_ptOrigin;</p>
<p> public:</p>
<p> CRoundRect(TCanvas* pCanvas):CShape(pCanvas)
{}</p>
<p> virtual ~CRoundRect() {}</p>
<p> virtual void OnMouseMove(int,int);</p>
<p> virtual void OnMouseDown(int,int);</p>
<p> virtual void OnMouseUp(int,int);</p>
<p>};</p>
<p>CRoundRect的实作几乎和Crectangle相同，只不过它们呼叫不同的API罢了，CRoundRect是以Canvas->RoundRect来画出图形的。</p>
<p>void CRoundRect::OnMouseMove(int x,int y)</p>
<p>{</p>
<p> m_pCanvas->Pen->Mode = pmXor;</p>
<p>
m_pCanvas->RoundRect(m_ptOrigin.x,m_ptOrigin.y,m_ptMove.x,m_ptMove.y,4,4);</p>
<p> m_ptMove.x = x;</p>
<p> m_ptMove.y = y;</p>
<p>
m_pCanvas->RoundRect(m_ptOrigin.x,m_ptOrigin.y,m_ptMove.x,m_ptMove.y,4,4);</p>
<p> m_pCanvas->Pen->Mode = pmCopy;</p>
<p>}</p>
</font><p><font SIZE="2"></font><font color="#FF0000" SIZE="2">·03-07 CEllipse 类别定义及实作
画圆形的类别</font></p><font SIZE="2">
<p>画圆形的处理和画矩形也大致相同，因为在Windows中是以包围矩形来定义一个圆形，因此和CRoundRect相同的，我们只要改写成画圆函式即可。其馀我就不多说了。</p>
<p>class CEllipse : public CShape</p>
<p>{</p>
<p> public:</p>
<p> POINT m_ptMove;</p>
<p> POINT m_ptOrigin;</p>
<p> public:</p>
<p> CEllipse(TCanvas* pCanvas):CShape(pCanvas)
{}</p>
<p> virtual ~CEllipse() {}</p>
<p> virtual void OnMouseMove(int,int);</p>
<p> virtual void OnMouseDown(int,int);</p>
<p> virtual void OnMouseUp(int,int);</p>
<p>};</p>
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<p><small><a href="../../../index.htm">首页</a> >> <a href="../../program.htm">程序设计</a>
>> <a href="../cbuilder.htm">C++ Builder</a> >> </small><font>具体而微的绘图程式</font>·CRoundRect类别定义及实作
画圆矩形的类别</p>
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