Symbian 开发技巧总结100条

核心提示：#endiftypedef PACKED struct tagBITMAPFILEHEADER{};68. SetExtent(TPoint(0,0), iQikAppUi.ClientRect().Size());并不可靠，特别是改变屏幕显示模式，Symbian 开发技巧总结100条(9)，可以使用CQikGridL

#endif

typedef PACKED struct tagBITMAPFILEHEADER{};

68. SetExtent(TPoint(0,0), iQikAppUi.ClientRect().Size());

并不可靠，特别是改变屏幕显示模式。可以使用CQikGridLayoutManager。

CQikGridLayoutManager* gridlayout = CQikGridLayoutManager::NewLC();

SetLayoutManagerL(gridlayout);

CleanupStack::Pop(gridlayout);

对于CQikViewDialog使用

Page(ActivePageId())->SetLayoutManagerL(gridlayout);

69. 直接创建独立的控件;

iMyCtrl->ConstructL( KCameraContainerRect, &(iEikonEnv->RootWin()));

70. 不同图片格式转换

CFbsBitmap::Create(aSizeInPixels,aDispMode);创造一张灰色位图，如EGray16

然后利用

CFbsBitmapDevice以及CFbsBitGc，将原图绘制上去即可

71. 修改视图标签：

MQikViewContext* viewContext = ViewContext();

viewContext->ChangeTextL(EContextViewText, viewContextText);

72. 侦听application焦点切换from a server process?

RWsSession ws;

User::LeaveIfError(ws.Connect());

CleanupClosePushL(ws);

RWindowGroup wg(ws);

User::LeaveIfError(wg.Construct(reinterpret_cast(&wg), EFalse));

CleanupClosePushL(wg);

wg.SetOrdinalPosition(-1); // hide the window

groupwg.DefaultOwningWindow();

wg.EnableReceiptOfFocus(EFalse);

wg.EnableFocusChangeEvents(); // get ready to receive focus change events

TRequestStatus status = KRequestPending;

ws.EventReady(&status);

User::WaitForRequest(status); // wait until the focus is changed

CleanupStack::PopAndDestroy(); // wg

TInt wgid = ws.GetFocusWindowGroup();

CApaWindowGroupName* gn = CApaWindowGroupName::NewLC(ws, wgid);

TUid uid = gn->AppUid(); // the uid of the focused app

CleanupStack::PopAndDestroy(2); // gn, ws