问题描述
由于需要对选项卡控件进行变通,我想保存然后恢复 CEditView
内容。我所做的如下所示,当滚动条和位置返回到它们正确的位置时,编辑控件的实际内容不会滚动(它在左上角,就像从未滚动过一样)。我试过 RedrawWindow()
,没有用。我一直主要处理水平滚动条,如果我只是简单地点击水平滚动条,内容就会跳转到它应该出现的位置。
我遗漏了什么或让它发挥作用的诀窍是什么?
TIA!!
// hack to work around ceditview getting its window contents changed
CView* pview=GetView(tabi);
if (pview->IsKindOf(RUNTIME_CLASS(CEditView))) {
CEditView* peditview=reinterpret_cast<CEditView*>(pview);
CEdit& editctrl=peditview->GetEditCtrl();
int startchar,endchar;
editctrl.GetSel(startchar,endchar);
int nhorzpos=peditview->GetScrollPos(SB_HORZ);
int nvertpos=peditview->GetScrollPos(SB_VERT);
CString strexistingtext;
pview->GetWindowText(strexistingtext);
// change label
tabctrl.SetTabLabel(tabi,strlabel);
// put back text
pview->SetWindowText(strexistingtext);
// put back where we were
peditview->SetScrollPos(SB_VERT,nvertpos);
peditview->SetScrollPos(SB_HORZ,nhorzpos);
editctrl.SetSel(startchar,endchar,TRUE);
}
else {
// change label
tabctrl.SetTabLabel(tabi,strlabel);
}
解决方法
终于得到了一些有用的东西:
// hack to work around ceditview getting its window contents changed
CView* pview=GetView(tabi);
if (pview->IsKindOf(RUNTIME_CLASS(CEditView))) {
CEditView* peditview=reinterpret_cast<CEditView*>(pview);
CEdit& editctrl=peditview->GetEditCtrl();
int startchar,endchar;
editctrl.GetSel(startchar,endchar);
int topline=editctrl.GetFirstVisibleLine();
int nhorzpos=peditview->GetScrollPos(SB_HORZ);
CString strexistingtext;
pview->GetWindowText(strexistingtext);
// change label
tabctrl.SetTabLabel(tabi,strlabel);
// put back text
pview->SetWindowText(strexistingtext);
// put back where we were
editctrl.SetSel(startchar,endchar,TRUE);
peditview->SetScrollPos(SB_HORZ,nhorzpos); // prevents ficker
editctrl.SendMessage(WM_HSCROLL,MAKEWPARAM(SB_THUMBPOSITION,nhorzpos),NULL);
editctrl.SendMessage(WM_HSCROLL,MAKEWPARAM(SB_ENDSCROLL,0),NULL);
editctrl.LineScroll(topline,0);
}
else {
// change label
tabctrl.SetTabLabel(tabi,strlabel);
}