标题栏大小，字体设置

[李水云]

自绘制标题栏还要加关闭、缩小按钮太麻烦。

怎么获取标题栏的宽度，设置标题栏字体大小。

有源码最好。

[李水云]

属性修改就不说了，那个知道。

[赵4老师]

标题栏宽度不就是窗口宽度减去边框宽度吗？ GetWindowRect GetSystemMetrics SM_CXBORDER

[赵4老师]

Constant Name(Value)..Description --------------------------------- SM_CXSCREEN(0)........Width of screen SM_CYSCREEN(1)........Height of screen SM_CXFRAME(32)........Width of window frame that can be sized SM_CYFRAME(33)........Height of window frame that can be sized SM_CXVSCROLL(2).......Width of arrow bitmap on vertical scroll bar SM_CYVSCROL(20).......Height of arrow bitmap on vertical scroll bar SM_CXHSCROLL(21)......Width of arrow bitmap on horizontal scroll bar SM_CYHSCROLL(3).......Height of arrow bitmap on horizontal scroll bar SM_CYCAPTION(4).......Height of caption SM_CXBORDER(5)........Width of window frame that cannot be sized SM_CYBORDER(6)........Height of window frame that cannot be sized SM_CXDLGFRAME(7)......Width of frame when window has WS_DLGFRAME style SM_CYDLGFRAME(8)......Height of frame when window has WS_DLGFRAME style SM_CXHTHUMB(10).......Width of thumb on horizontal scroll bar SM_CYHTHUMB(9)........Height of thumb on horizontal scroll bar SM_CXICON(11).........Width of icon SM_CYICON(12).........Height of icon SM_CXCURSOR(13).......Width of cursor SM_CYCURSOR(14).......Height of cursor SM_CYMENU(15).........Height of single-line menu SM_CXFULLSCREEN(16)...Width of window client area for full-screen window SM_CYFULLSCREEN(17)...Height of window client area for full-screen window (height - caption) SM_CYKANJIWINDOW(18)..Height of Kanji window SM_CXMINTRACK(34).....Minimum tracking width of window SM_CYMINTRACK(35).....Minimum tracking height of window SM_CXMIN(28)..........Minimum width of window SM_CYMIN(29)..........Minimum width of window SM_CXSIZE(30).........Width of bitmaps contained in the title bar SM_CYSIZE(31).........Height of bitmaps contained in the title bar SM_MOUSEPRESENT(19)...Mouse present SM_DEBUG(22)..........Nonzero if Windows debug version

[赵4老师]

How to Draw a Custom Window Caption Last reviewed: November 2, 1995 Article ID: Q99046 The information in this article applies to: Microsoft Windows Software Development Kit (SDK) versions 3.1 Microsoft Win32 Application Programming Interface (API) included with: - Microsoft Windows NT versions 3.5 and 3.51 - Microsoft Windows 95 version 4.0 SUMMARY Microsoft Windows draws captions in the caption bar (or title bar) for all eligible windows in the system. Applications need to specify only the WS_CAPTION style to take advantage of this facility. The current version of Microsoft Windows, however, imposes three significant restrictions on the captions. An application that does not want to be tied by any of these restrictions may want to draw its own caption. This article lists the restrictions and the steps required to draw a window caption. These restrictions also apply to Windows NT, but there are a few differences for Windows 95. It is important to note that an application should not draw its own caption unless it has very good reasons to do so. A window caption is a user interface object, and rendering it in ways different from other windows in the system may obstruct the user's conceptual grasp of the Microsoft Windows user interface. MORE INFORMATION Windows and Windows NT The three important restrictions imposed by Microsoft Windows version 3.1 and Microsoft Windows NT on the caption for a window are: - It consists of text only; graphics are not allowed. - All text is centered and drawn with the system font. - The length of the displayed caption is limited to 78 characters even when there is space on the caption bar to accommodate extra characters. An application can essentially render its own caption consisting of any graphic and text with the standard graphics and text primitives by painting on the nonclient area of the window. The application should draw in response to the WM_NCPAINT, WM_NCACTIVATE, WM_SETTEXT, and WM_SYSCOMMAND messages. When processing these messages, an application should first pass on the message to DefWindowProc() for default processing, then render its caption before returning from the message. This ensures that Microsoft Windows can properly draw the nonclient area. Because drawing the caption is part of DefWindowProc()'s nonclient area processing, an application should specify an empty window title to avoid any Windows-initiated drawing in the caption bar. The following steps indicate the computations needed to determine the caption drawing area: Get the current window's rectangle using GetWindowRect(). This includes client plus nonclient areas and is in screen coordinates. Get a device context (DC) to the window using GetWindowDC(). Compute the origin and dimensions of the caption bar. One needs to account for the window decorations (frame, border) and window bitmaps (min/max/system boxes). Remember that different window styles will result in different decorations and a different number of min/max/system boxes. Use GetSystemMetrics() to compute the dimensions of the frame, border, and the system bitmap dimensions. Render the caption within the boundaries of the rectangle computed in step 3. Remember that the user can change the caption bar color any time by using the Control Panel. Some components of the caption, particularly text backgrounds, may need to be changed based on the current caption bar color. Use GetSysColor to determine the current color. The following code sample draws a left-justified caption for a window (the code sample applies only to the case where the window is active): Sample Code case WM_NCACTIVATE: if ((BOOL)wParam == FALSE) { DefWindowProc( hWnd, message, wParam, lParam ); // Add code here to draw caption when window is inactive. return TRUE; } // Fall through if wParam == TRUE, i.e., window is active. case WM_NCPAINT: // Let Windows do what it usually does. Let the window caption // be empty to avoid any Windows-initiated caption bar drawing DefWindowProc( hWnd, message, wParam, lParam ); hDC = GetWindowDC( hWnd ); GetWindowRect( hWnd, (LPRECT)&rc2 ); // Compute the caption bar's origin. This window has a system box // a minimize box, a maximize box, and has a resizeable frame x = GetSystemMetrics( SM_CXSIZE ) + GetSystemMetrics( SM_CXBORDER ) + GetSystemMetrics( SM_CXFRAME ); y = GetSystemMetrics( SM_CYFRAME ); rc1.left = x; rc1.top = y; // 2*x gives twice the bitmap+border+frame size. Since there are // only two bitmaps, two borders, and one frame at the end of the // caption bar, subtract a frame to account for this. rc1.right = rc2.right - rc2.left - 2*x - GetSystemMetrics( SM_CXFRAME ); rc1.bottom = GetSystemMetrics( SM_CYSIZE ); // Render the caption. Use the active caption color as the text // background. SetBkColor( hDC, GetSysColor(COLOR_ACTIVECAPTION) ); DrawText( hDC, (LPSTR)"Left Justified Caption", -1, (LPRECT)&rc1, DT_LEFT ); ReleaseDC( hWnd, hDC ); break; Windows 95 On Windows 95, the text is not centered and the user can choose the Font. In addition, your application might want to monitor the WM_WININICHANGED message, because the user can change titlebar widths, and so forth, dynamically. When this happens, the application should take the new system metrics into account, and force a window redraw. -------------------------------------------------------------------------------- Additional reference words: 3.00 3.10 3.50 4.00 minimum maximum KbCategory: kbui kbcode KbSubCategory: UsrPnt THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Last reviewed: November 2, 1995 © 1998 Microsoft Corporation. All rights reserved. Terms of Use.