Switching between the pure view
Single document multi-view switching is one of the most difficult problems I have encountered in learning MFC. I feel that the view switch is divided into three levels, the first is to switch the view class in the case of the non-segmented panes, the second is to switch the experiment view in one pane of the pane, and the third is to toggle between the separate panes and the different views.
At the beginning of the creation of SDI in MFC, MFC default View class is CView, if CView to meet your needs, you can click Finish directly, if you do not want CView to become your default view class, you can mark this place.
If you forget. Correcting the default view class It doesn't matter, we can change it in the code:
In the app class there is a function called InitInstance (), in which there is a code
CSingleDocTemplate pdoctemplate;
Pdoctemplate = new CSingleDocTemplate (
Idr_mainframe,
Runtime_class (Cprogram8doc),
Runtime_class (CMainFrame),
Runtime_class (CView1)); Change your default view class here, pay attention to don't forget to include the header file Oh
if (!pdoctemplate)
return FALSE;
AddDocTemplate (pdoctemplate);
I'm done with the changes to the default view class, we're now going to the topic.
1. Create the view class you need to switch, addclass Enter or create a control and then addclass create the control engagement class, which is useful for controls like form.
2, the grasp of the place, such as menu items Click, click the mouse or something, I am the Application menu item to switch the window
void Cmainframe::onview1 ()
{
Todo:add your command handler code here
Switchtoform (IDD_FORMVIEW1);
}
void Cmainframe::onview2 ()
{
Todo:add your command handler code here
Switchtoform (IDD_FORMVIEW2);
}
3, Switchtoform This function is primarily used for view switching
Here are some of the first things to do in this function:
1, the appropriate front view class pointer and the need to convert the view class pointer, if the first application needs new one, and the document class contact;
2, change the activity view;
3. Display new view and concealed old view;
4, set the control ID;
5, adjust the frame view.
void Cmainframe::switchtoform (int nform)
{
CView Poldactiveview=getactiveview (); 1
CView pnewactiveview= (CView) GetDlgItem (nform);
if (Null==pnewactiveview)
{
Switch (nform)
{
Case IDD_FORMVIEW1:
Pnewactiveview= (CView) new CView1;
Break
Case IDD_FORMVIEW2:
Pnewactiveview= (CView) new CView2;
Break
Case IDD_FORMVIEW3:
Pnewactiveview= (CView) new CView3;
Break
Case IDD_FORMVIEW4:
Pnewactiveview= (CView) new CView4;
Break
Default
Break
}
CCreateContext context;
Context.m_pcurrentdoc=poldactiveview->getdocument ();
Pnewactiveview->create (Null,null,ws_child | Ws_border,cframewnd::rectdefault,this,nform,&context);
Pnewactiveview->updatedata ();
}
SetActiveView (Pnewactiveview); 2
Pnewactiveview->showwindow (Sw_show); 3
Poldactiveview->showwindow (Sw_hide);
if (Poldactiveview->getruntimeclass () ==runtime_class (CView1))//4
Poldactiveview->setdlgctrlid (IDD_FORMVIEW1);
else if (Poldactiveview->getruntimeclass () ==runtime_class (CVIEW2))
Poldactiveview->setdlgctrlid (IDD_FORMVIEW2);
else if (Poldactiveview->getruntimeclass () ==runtime_class (CVIEW3))
Poldactiveview->setdlgctrlid (IDD_FORMVIEW3);
else if (Poldactiveview->getruntimeclass () ==runtime_class (CVIEW4))
Poldactiveview->setdlgctrlid (IDD_FORMVIEW4);
Pnewactiveview->setdlgctrlid (Afx_idw_pane_first);
RecalcLayout (); 5
}
Invented in RecalcLayout () when looking at other people's posts online; There is a poldactiveview in front of me, I feel so much waste of information, view class created to cover up, with the hour from the beginning of the show. This approach should be created better than every application. My little brother, a friend with a comment debate can contact me.
View Toggle with separate panes
Toggle View the second layer is a view switch with a separate pane
The view switch of the pane, I feel the difficulty is not easily in the limited area of the view switch.
1, the initial separate panes, here I soon not more statement, details see the following links;
2, give each view a unique ID number;
M_splitter. CreateStatic (this,1,2);
M_splitter. CreateView (0,0,runtime_class (CTree1), CSize (100,100), pContext);
M_splitter. CreateView (0,1,runtime_class (CForm1), CSize (100,100), pContext);
CWnd Pwnd=m_splitter. GetPane (0,1);
m_pviews[0]= (CView) m_splitter. GetPane (0,1);
Pwnd->setdlgctrlid (IDD_FORM1);
Pwnd->showwindow (Sw_hide);
M_splitter. CreateView (0,1,runtime_class (CForm2), CSize (100,100), pContext);
Pwnd=m_splitter. GetPane (0,1);
m_pviews[1]= (CView) m_splitter. GetPane (0,1);
Pwnd->setdlgctrlid (M_splitter. Idfromrowcol (0,1));
Pwnd->showwindow (Sw_show);
RedrawWindow ();
return true;
Note: I createview a new view here, I will overwrite the previous view, the final display is the last view, the front view is only hidden, and the application of the time to display it. return value to overwrite the statement returned to the base class return Cframewndex::oncreateclient (LPCs, pContext); Annotate the sentence and return true;
3, where to activate the switching function itself design, I applied the menu;
4, the response first consists of the following steps:
1, the initial access to the current view in the pane;
2, apply iskindof Determine whether this class is going to switch to the class;
3, get frame length and width of the window;
CView pview= (CView) m_splitter. GetPane (0,1); 1
M_btest=pview->iskindof (Runtime_class (CFORM2)); 2
CRect rcframe,rcclient; 3
M_splitter. GetClientRect (&rcclient);
GetClientRect (&rcframe);
Above all is to organize the work, below is the real switch;
4. Delete the original view
5. Create the current View
6. Adjustment frame
if (m_btest)
{
M_splitter. Deleteview (0,1);
M_splitter. CreateView (0,1,runtime_class (CForm1), CSize (Rcclient.width (), Rcframe.height ()), NULL);
M_splitter. RecalcLayout ();
}
Else
{
M_splitter. Deleteview (0,1);
M_splitter. CreateView (0,1,runtime_class (CForm2), CSize (Rcclient.width (), Rcframe.height ()), NULL);
M_splitter. RecalcLayout ();
}
Look carefully, it seems that this is more than the pure view switch is also simple, this has no way, csplitterwnd supply such a convenient way.
Toggle between separate view and non-separate view
This is the trilogy I think the most difficult, not to say how difficult the statutes, just think of this segmentation format is really not easy, today, the trilogy of the last song to share to the master, but also for the internet to do a little to offer.
Let's begin with the thinking of the statutes, create a class based on CFrameWnd for the separate window layer, then write the code for the separate views here, and then switch to the other non-separate view classes.
Let's take a look at the implementation process:
1. Create a derived class csplitterframe based on CFrameWnd;
2. Add the view class to fill the window and switch the view class with the separate view;
3. Overload the OnCreateClient function for this derived class, and the organization view separately
M_splitter.createstatic (this,1,2);
M_splitter.createview (0,0,runtime_class (Clefttree), CSize (300,0), pContext);
M_splitter.createview (0,1,runtime_class (crightlist), CSize (300,0), pContext);
return true;
Here I do not say clear, presumably the master are very familiar with, here I would like to say a bit of my own mistakes. I Dibon want to getclientrect here to get window size, but failed, wrestling not familiar with inquire, later only invented, this is not cmainframe, so the foundation can't get, if using API function.
4. Add frame and view class pointer variables inside the CMainFrame class
Csplitterframe M_psplitterframe; Separate view frame pointer
CView M_pview; 0-D view class, based on the CView class
CView M_pform; 0-D view class, based on the CFormView class
int M_ncurrentid; Record Current View
5. Overload the OnCreateClient function inside the CMainFrame class to create a view and separate frames
CRect rcclient;
GetClientRect (&rcclient);
M_pview=new cviewshow;
M_pview->create (Null,null,afx_ws_default_view &~ws_border,rcclient,this,null,pcontext);
M_pview->showwindow (Sw_show);
M_pview->setdlgctrlid (Afx_idw_pane_first);
Pcontext->m_pnewviewclass= (CRuntimeClass) M_pview; Set the default view class
M_pform=new cformshow;
M_pform->create (Null,null,afx_ws_default_view &~ws_border,rcclient,this,idd_formshow,pcontext);
M_pform->showwindow (Sw_hide);
M_psplitterframe=new Csplitterframe;
M_psplitterframe->create (Null,null,afx_ws_default_view &~ws_border,rcclient,this,null,0,pcontext);
M_psplitterframe->showwindow (Sw_hide);
return true;
6. Create a view switch function
BOOL Cmainframe::switch (int. NID)
{
if (Nid==m_ncurrentid)
return false;
Switch (NID)
{
Case Idd_formshow:
M_pform->showwindow (Sw_show);
M_pform->setdlgctrlid (Afx_idw_pane_first);
M_pview->showwindow (Sw_hide);
M_pview->setdlgctrlid (afx_idw_pane_first+2);
M_psplitterframe->showwindow (Sw_hide);
M_psplitterframe->setdlgctrlid (afx_idw_pane_first+1);
M_ncurrentid=idd_formshow;
Break
Case AFX_IDW_PANE_FIRST+1:
M_psplitterframe->showwindow (Sw_show);
M_psplitterframe->setdlgctrlid (Afx_idw_pane_first);
M_pform->showwindow (Sw_hide);
M_pform->setdlgctrlid (idd_formshow);
M_pview->showwindow (Sw_hide);
M_pview->setdlgctrlid (afx_idw_pane_first+2);
m_ncurrentid=afx_idw_pane_first+1;
Break
Case AFX_IDW_PANE_FIRST+2:
M_pview->showwindow (Sw_show);
M_pview->setdlgctrlid (Afx_idw_pane_first);
M_pform->showwindow (Sw_hide);
M_pform->setdlgctrlid (idd_formshow);
M_psplitterframe->showwindow (Sw_hide);
M_psplitterframe->setdlgctrlid (afx_idw_pane_first+1);
m_ncurrentid=afx_idw_pane_first+2;
Break
Default
Break
}
RecalcLayout ();
return true;
}
7. Create a Call method
void Cmainframe::onform ()
{
Todo:add your command handler code here
Switch (idd_formshow);
}
void Cmainframe::onview ()
{
Todo:add your command handler code here
Switch (afx_idw_pane_first+2);
}
void Cmainframe::onsplitter ()
{
Todo:add your command handler code here
Switch (afx_idw_pane_first+1);
}
There is a strong attraction between us. Just a few hours later, we both know: our heart is a whole of the two halves, our hearts are twins, is a bosom friend. She makes me feel more energetic, more perfect and happier. Even if she is not with me, I still feel happy, because she always in one way or another to appear in my heart. --Enrique Barrios "The Civilization of Love"
From: http://www.gjprj.cn/news1.asp?id=2354
