實(shí)現(xiàn)目標(biāo)：在狀態(tài)欄中，使得一個(gè)矩形的字體不斷的滾動(dòng)顯示，矩形區(qū)域字體不斷右移變化，然后達(dá)到目的地后又從左邊開(kāi)始顯示。
代碼：
在CMainFrame的OnCreate函數(shù)中添加如下代碼，其中，IDS_MOVE是滾動(dòng)顯示的內(nèi)容，屬于一個(gè)String Table資源。
????CString?str?=?"Hello,world";
????CString?str2?=?"";
????CClientDC?dc(this);
????CSize?sz?=?dc.GetTextExtent(str);
????m_wndStatusBar.SetPaneInfo(1,IDS_MOVE,SBPS_NORMAL,sz.cx?*?5);
????m_wndStatusBar.SetPaneText(1,str2);
????SetTimer(1,200,NULL);
????CRect?rect;
????m_wndStatusBar.GetItemRect(1,&rect);
????m_str.Create(str,WS_CHILD|WS_VISIBLE,rect,&m_wndStatusBar,126);
然后添加WM_TIMER的響應(yīng)函數(shù)，如下：
void?CMainFrame::OnTimer(UINT?nIDEvent)?
{
????//?TODO:?Add?your?message?handler?code?here?and/or?call?default
????CRect?rect;
????CString?str?=?"Hello,world!";
????CClientDC?dc(this);
????CSize?sz?=?dc.GetTextExtent(str);
????m_wndStatusBar.GetItemRect(1,&rect);?//得到顯示的矩形區(qū)域
????static?CRect?CurRect?=?rect;
????CurRect.right?=?CurRect.left?+?sz.cx;????//當(dāng)前的矩形區(qū)域就是一個(gè)滑動(dòng)變化的區(qū)域
????if(CurRect.right>=rect.right)
????????CurRect?=?rect;
????else{
????????CurRect.left?+=?10;
????????CurRect.right?+=?10;
????}
????m_str.MoveWindow(CurRect);????//移動(dòng)控件的位置
????CFrameWnd::OnTimer(nIDEvent);
}
于是出現(xiàn)了所需要的效果。
注：兩個(gè)遇到的API函數(shù)：
CStatusBar::GetItemRect
void?GetItemRect(?int?nIndex,?LPRECT?lpRect?)?const;
Parameters
nIndex
Index?of?the?indicator?whose?rectangle?coordinates?are?to?be?retrieved.
lpRect
Points?to?aRECT?structure?or?a?CRect?object?that?will?receive?the?coordinates?of?the?indicator?specified?by?nIndex.
Remarks
Copies?the?coordinates?of?the?indicator?specified?by?nIndex?into?the?structure?pointed?to?by?lpRect.?Coordinates?are?in?pixels?relative?to?the?upper-left?corner?of?the?status?bar.
BOOL?MoveWindow(?LPCRECT?lpRect,?BOOL?bRepaint?=?TRUE?);
SeeMoveWindow?in?the?Win32?SDK.
Remarks
Changes?the?window's?size?and?position.?The?second?version?of?this?method?uses?aRECT?structure?to?determine?the?window's?new?position,?width,?and?height.
posted on 2010-02-21 19:15
deercoder 閱讀(441)
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