如何自定义提示窗口(Hint Window)

王朝system·作者佚名  2008-06-01
窄屏简体版  字體: |||超大  

// 自定义 THintWindow 类

class TCcrunHintWindow : public THintWindow

{

bool FActivating;

__fastcall TCcrunHintWindow(TComponent* Owner)

: THintWindow(Owner)

{

Canvas->Font->Name = "宋体";

Canvas->Font->Color = clBlack;

Canvas->Font->Size = 9;

}

void __fastcall Paint(void)

{

TRect rect = ClientRect;

// Hint边框颜色

Canvas->Brush->Color = TColor(0xDBB8BA);

Canvas->FillRect(rect);

// 绘制整个Hint的边框

Canvas->Pen->Color = TColor(0x69230E);

Canvas->Rectangle(rect);

// Hint背景的颜色

Color = clWhite;

// Hint文字透明

Canvas->Brush->Style = bsClear;

// 绘出Hint文字

Canvas->Font->Color = clBlack;

Canvas->TextOut(4, int(rect.Bottom / 2)

- int(Canvas->TextHeight(Caption) / 2), Caption);

}

virtual void __fastcall NCPaint(HDC hdc)

{

// 63 63 72 75 6E 2E 63 6F 6D

Invalidate();

}

virtual void __fastcall CreateParams(TCreateParams &Params)

{

// 去掉Hint窗口的边框

Params.Style = Params.Style & ~WS_BORDER;

THintWindow::CreateParams(Params);

}

// Code by ccrun(老妖),做人要厚道,转载请留名

virtual void __fastcall ActivateHint(const TRect &Rect, const String AHint)

{

FActivating = true;

try

{

Caption = AHint;

TRect r = Rect;

r.Left -= 10;

r.Right += 10;

r.Top -= 5;

r.Bottom += 5;

// 更新区域

UpdateBoundsRect(r);

// Hint窗口处于屏幕边缘时的调整

if(r.Top + Height > Screen->DesktopHeight)

r.Top = Screen->DesktopHeight - Height;

if(r.Left + Width > Screen->DesktopWidth)

r.Left = Screen->DesktopWidth - Width;

if(r.Left < Screen->DesktopLeft)

r.Left = Screen->DesktopLeft;

if(r.Bottom < Screen->DesktopTop)

r.Bottom = Screen->DesktopTop;

// 创建一个矩形

// 63 63 72 75 6E 2E 63 6F 6D

HRGN hrgn = CreateRectRgn(0, 0, r.Width(), r.Height());

// HRGN hrgn = CreateRoundRectRgn(0, 0, r.Width(), r.Height(), 4, 4);

// 设置指定句柄的窗口外形

SetWindowRgn(Handle, hrgn, true);

// 改变窗口的位置,Z Order,及其他一些属性

SetWindowPos(Handle, HWND_TOPMOST, r.Left, r.Top, r.Width(),

r.Height(), SWP_SHOWWINDOW SWP_NOACTIVATE);

// 重画窗口

Invalidate();

}

__finally

{

FActivating = false;

}

}

};

//---------------------------------------------------------------------------

// 实现代码

__fastcall TForm1::TForm1(TComponent* Owner)

: TForm(Owner)

{

HintWindowClass = __classid(TCcrunHintWindow);

//

ShowHint = true;

Button1->Hint = "这是一个按钮";

Edit1->Hint = "这是一个文本框";

}

 
 
 
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