class CMyVisualManager : public CMFCVisualManager
{
public:
virtual void OnDrawMenuScrollButton(CDC* pDC, CRect rect, BOOL bIsScrollDown, BOOL bIsHighlited, BOOL bIsPressed, BOOL bIsDisabled);
};
void CMyVisualManager::OnDrawMenuScrollButton(CDC* pDC, CRect rect, BOOL bIsScrollDown, BOOL bIsHighlited, BOOL bIsPressed, BOOL bIsDisabled)
{
// 在这里添加你自己的绘制逻辑
// 使用 pDC 绘制到指定的 rect 区域
// bIsScrollDown 表示是否是向下滚动按钮
// bIsHighlited 表示按钮是否高亮,bIsPressed 表示按钮是否被按下,bIsDisabled 表示按钮是否禁用
// 举例:简单绘制一个滚动按钮外观
if (bIsDisabled)
{
// 绘制禁用状态下的按钮外观
pDC->FillSolidRect(rect, RGB(240, 240, 240));
pDC->Draw3dRect(rect, RGB(128, 128, 128), RGB(192, 192, 192));
}
else
{
// 绘制正常状态下的按钮外观
pDC->FillSolidRect(rect, bIsHighlited ? RGB(200, 200, 255) : RGB(255, 255, 255));
pDC->Draw3dRect(rect, RGB(0, 0, 0), RGB(192, 192, 192));
}
// 在按钮中心绘制箭头(向上或向下)
CPoint ptCenter = rect.CenterPoint();
int nArrowSize = 5;
if (bIsScrollDown)
{
// 向下箭头
CPoint ptTop(ptCenter.x, ptCenter.y - nArrowSize);
CPoint ptRight(ptCenter.x + nArrowSize, ptCenter.y + nArrowSize);
CPoint ptLeft(ptCenter.x - nArrowSize, ptCenter.y + nArrowSize);
CPen pen(PS_SOLID, 1, RGB(0, 0, 0));
CPen* pOldPen = pDC->SelectObject(&pen);
pDC->MoveTo(ptTop);
pDC->LineTo(ptRight);
pDC->MoveTo(ptTop);
pDC->LineTo(ptLeft);
pDC->SelectObject(pOldPen);
}
else
{
// 向上箭头
CPoint ptTop(ptCenter.x, ptCenter.y + nArrowSize);
CPoint ptRight(ptCenter.x + nArrowSize, ptCenter.y - nArrowSize);
CPoint ptLeft(ptCenter.x - nArrowSize, ptCenter.y - nArrowSize);
CPen pen(PS_SOLID, 1, RGB(0, 0, 0));
CPen* pOldPen = pDC->SelectObject(&pen);
pDC->MoveTo(ptTop);
pDC->LineTo(ptRight);
pDC->MoveTo(ptTop);
pDC->LineTo(ptLeft);
pDC->SelectObject(pOldPen);
}
}
在上述示例中,CMyVisualManager 是自定义的 CMFCVisualManager 派生类,通过重写 OnDrawMenuScrollButton 方法,可以实现自定义的菜单滚动按钮的绘制逻辑。具体的绘制效果和样式会根据你的需求而变化。
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