在我的MFC(Feature Pack)应用程序中,可以动态创建停靠窗格以显示图表/表格等 但是,我不想让用户两次打开同一个东西。
我创建了一个这样的窗格:
// Create CMyDockablePane pPane
pPane->Create(...);
pPane->EnableDocking(CBRS_ALIGN_ANY);
// Create CRect rcPane
pPane->FloatPane(rcPane);
这似乎工作正常。
这是我尝试检查窗格是否已存在的方法。窗格由其类型(类)和参数标识。
BOOL CanOpenPane(const type_info & paneType, const CMyParameter & parameter) const
{
CMainFrame* pFrm = GetMainFrame();
CDockingManager* pDockMan = pFrm->GetDockingManager();
// Check if there already is a pane of the same type which also has the same parameter.
bool canOpen = true;
CObList panes;
pDockMan->GetPaneList(panes);
POSITION pos = panes.GetHeadPosition();
while (pos)
{
CMyDockablePane* pPane = dynamic_cast<CMyDockablePane*>(panes.GetNext(pos));
if (NULL == pPane) { continue; }
if (paneType == typeid(*pPane) &&
pPane->GetParameter() == parameter)
{
canOpen = false;
break;
}
}
return canOpen;
}
问题在于,当我关闭窗格时,无法识别。 CDockingManager对象仍然返回GetPanes()调用中的窗格。
如何告诉经理不要退回已关闭的窗格?
或
当窗格关闭时,如何从窗格列表中删除窗格?
我更深入地发现,当点击标题栏中的“x”按钮时,CWnd对象实际上并未关闭,只有他们的容器。 所以真正的问题似乎是真正关闭窗格 我也改变了问题以更好地反映问题。
答案 0 :(得分:5)
如我的更新中所述,对接管理器给我关闭窗格的问题是,窗格实际上并未关闭。只有他们的容器被关闭;窗格本身就是隐藏的。
因此,为了真正关闭窗格,我在CMDIFrameWndEx
派生的主框架类中覆盖了以下方法:
BOOL CMainFrame::OnCloseMiniFrame(CPaneFrameWnd* pWnd)
{
if(0 == pWnd->GetPaneCount()) { return TRUE; } // No panes.. allow closing
// Close all child panes of the miniframe that is about to be closed.
//
// Panes are placed inside a mini frame when they have the "floating" status.
// Since I didn't find a way to iterate over the panes of a mini frame
// (CMultiPaneFrameWnd can have several panes), we iterate over all panes
// and close those whose parent frame is pWnd.
CDockingManager* pDockMan = GetDockingManager();
if(NULL != pDockMan)
{
CObList allPanes;
pDockMan->GetPaneList(allPanes, TRUE, NULL, TRUE);
for(POSITION pos = allPanes.GetHeadPosition(); pos != NULL;)
{
CDockablePane* pPane = dynamic_cast<CDockablePane*>(allPanes.GetNext(pos));
if (NULL == pPane) { continue; }
if(pWnd == pPane->GetParentMiniFrame())
{
pPane->PostMessage(WM_CLOSE); // Note: Post instead of Send
}
}
}
return TRUE; // Allow closing
}
第二个:
BOOL CMainFrame::OnCloseDockingPane(CDockablePane* pWnd)
{
CObList paneList;
// We can get CDockablePanes and CTabbedPanes here.
// The tabbed panes contain dockable panes.
CTabbedPane* pTabbed = dynamic_cast<CTabbedPane*>(pWnd);
CDockablePane* pDockable = dynamic_cast<CDockablePane*>(pWnd);
if(NULL != pTabbed)
{
pTabbed->GetPaneList(paneList);
}
else if(NULL != pDockable)
{
paneList.InsertAfter(paneList.GetHeadPosition(), pDockable);
}
// Whatever it was, we now have a list of dockable panes, which we will close.
for(POSITION pos = paneList.GetHeadPosition(); NULL != pos;)
{
CDockablePane* pPane = dynamic_cast<CDockablePane*>(paneList.GetNext(pos));
ASSERT(NULL != pPane);
// Let the window disappear and then recalculate the layout.
// Not doing this causes problems with panes grouped together in a tabbed pane.
pPane->ShowWindow(SW_HIDE);
RecalcLayout();
// Really close the window so the docking manager also doesn't know of it anymore.
pPane->Reset();
pPane->PostMessage(WM_CLOSE); // Note: Post instead of Send
}
return TRUE; // Allow closing
}
答案 1 :(得分:2)
向CMainFram添加一个msg条目,如下所示:
ON_REGISTERED_MESSAGE(AFX_WM_ON_PRESS_CLOSE_BUTTON,OnClosePane)
OnClosePane看起来像这样:
LRESULT CMainFrame::OnClosePane(WPARAM,LPARAM lp)
{
CBasePane* pane = (CBasePane*)lp;
int id = pane->GetDlgCtrlID();
pane->ShowPane(FALSE, FALSE, FALSE);
RemovePaneFromDockManager(pane,TRUE,TRUE,TRUE,NULL);
AdjustDockingLayout();
pane->PostMessage(WM_CLOSE);
PostMessage(WM_RESETMEMBER,id,0);
return (LRESULT)TRUE;//prevent close , we already close it
}
在CBasePane :: OnLButtonDown处理程序中间调用OnClosePane,销毁窗口 将使您的代码断言,因此您需要发布消息(WM_CLOSE)而不是发送它,这使得CBasePane :: OnLButtonDown处理程序有机会在窗格hWnd仍然有效时完成执行。 并且对于相同的resone我返回True以防止关闭,因为我们已经通过关闭它 WM_CLOSE也会破坏窗口。
WM_RESETMEMBER消息是已注册的窗口消息,用于将窗格成员重置为null。
它的实现看起来像这样:
LRESULT CMainFrame::OnResetMember(WPARAM wp,LPARAM)
{
int id = (int)wp;
switch(id)
{
case IDC_BIDBOND_TREE_PANE:
m_pBBTreePane.reset((BBTreePane*)NULL);
break;
case IDC_REFTREE_PANE :
m_pRefTreePane.reset((RefTreePane*)NULL);
break;
default :
return (LRESULT)FALSE;//id warent found
}
return (LRESULT)TRUE;
}
你应该像以下一样输入地图条目:
ON_REGISTERED_MESSAGE(WM_RESETMEMBER,OnResetMember)
你应该像这样在全球注册消息:
const UINT WM_RESETMEMBER = ::RegisterWindowMessage(_T("WM_RESETMEMBER"));
答案 2 :(得分:1)
当您关闭窗格以完成工作时,我希望能够拨打CDockingManager::RemovePaneFromDockManager。
答案 3 :(得分:0)
在mfc文档中,它说不要使用showwindow,所以请使用showpane来显示窗格