I feel like I'm missing something obvious, but I want to be able to error check what the user inputted in a modal dialog when they hit 'OK', and allow them to go back and fix it without closing the dialog.
Is there something I can set within the 'OK' button's slot callback that will tell the dialog not to close?
You can use done method which you could know return value is rejected or not.
for example:
void ExDialog::done(int res)
{
if (res == QDialog::Accepted)
{
// check if it is ok or not
if(not)
{
ShowErrPopUp();
return;
}
}
QDialog::done(res);
}
// when ok button is clicked
void ExDialog::action_ok_bt_clicked()
{
this->accept();
}
Related
I am trying to fix a validation bug in a MFC CEdit control. Currently, validation is performed in an OnChange event handler. But this does not work because it validates data before the user is finished entering it.
So, instead, I am trying to validate inside an OnKillFocus event handler. If validation fails, then I use GotoDlgCtrl() to return focus to the edit box that contained the invalid data. And when I call GotoDlgCtrl(), the kill focus event fires again, and I'm in an infinite loop.
So, I'd like to handle an event that fires just before the control loses focus, so that if I determine that the data is invalid, I can stop focus from leaving and instead get the user to enter correct data.
I know I've seen a Validating event someplace, but that was probably in the .Net world. But it offers the functionality I'm looking for.
Right-click the dialog resource and invoke Class Wizard:
Next, go to the Virtual Functions tab, locate PreTranslateMessage and add it:
Then, you can do something like this:
BOOL CTestDlgDlg::PreTranslateMessage(MSG* pMsg)
{
if (pMsg->message == WM_CHAR)
{
CWnd *pControl = GetDlgItem(IDC_EDIT1);
if (pControl->GetSafeHwnd() == pMsg->hwnd)
{
if (pMsg->wParam == _TINT('!'))
{
AfxMessageBox(_T("Not allowed ! character"));
return TRUE;
}
}
}
return CDialogEx::PreTranslateMessage(pMsg);
}
Normally the control is a member variable of type CEdit so you could compare against m_edit.GetSafeHwnd() instead.
Results:
Update
I realise you stated:
But this does not work because it validates data before the user is finished entering it.
You could use WM_KEYUP instead:
BOOL CTestDlgDlg::PreTranslateMessage(MSG* pMsg)
{
if (pMsg->message == WM_KEYUP)
{
CWnd *pControl = GetDlgItem(IDC_EDIT1);
if (pControl->GetSafeHwnd() == pMsg->hwnd)
{
CString str;
GetDlgItemText(IDC_EDIT1, str);
if (str.Find(_T("!")) >= 0)
{
AfxMessageBox(_T("Not allowed ! character"));
return TRUE;
}
}
}
return CDialogEx::PreTranslateMessage(pMsg);
}
That is give you a chance to validate after the display has been updated.
An alternative it to customize your DoDataExchange handler. In there you can validate as required. Then in your code you simple test the return value of UpdataData(TRUE) for FALSE.
Hi i have following code:
void MainWindow::on_listWidgetNotes_currentItemChanged(QListWidgetItem *current, QListWidgetItem *previous)//Test!
{
if(current != NULL)
{
ui->plainTextEditContent->setEnabled(true);
change = false;
if(isModified)
{
auto reply = QMessageBox::question(this, "Test", "Do you want save changes?", QMessageBox::Yes|QMessageBox::No|QMessageBox::Cancel);
if (reply == QMessageBox::Yes) on_pushButtonSave_clicked();
else if(reply == QMessageBox::No) notes.closeFile();
else
{
//ui->listWidgetNotes->blockSignals(true);
ui->listWidgetNotes->setCurrentItem(previous);
//ui->listWidgetNotes->blockSignals(false);
return;
}
}
isModified = false;
this->setWindowTitle(current->text()+" - VfNotes 1.0");
ui->plainTextEditContent->setPlainText(notes.openFile(current->text()));
}
}
In specified case code have to show message box and set focus on previous item, after select cancel button.
But setCurrentItem calls on_listWidgetNotes_currentItemChanged again with this message box. After use blockSignals focus doesn't come back on previous element. What to do to set focus on previous item after click cancel, that on_listWidgetNotes_currentItemChanged wasn't call again?
So, if this is the slot that gets called when the selection changes, then instead this slot getting called , create another slot and from there, you call this function..
Now this new slot will have the previous item and from there if the function returns a book instead of void signifying that a cancel is pressed, then you call setCurrentItem again...
CMFCToolBarComboBoxEdit handles the BackSpace button but it doesn't handle the delete button.
Is there any way to handle the delete button except PreTranslateMessage?
if yes, what is this way?
if no, then how can I get the current cursor position in the control and how to remove specific char using its index so I can remove the char which on the right of the cursor if nothing is selected?
Thanks in advance.
Yes use, PreTranslateMessage. If you detected the sequence that should be handled, call:
if (..) // Check if you have a message that should
// be passed to the window directly
{
TranslateMessage(pMsg);
DispatchMessage(pMsg);
return TRUE;
}
You can do this always in PreTranslateMessage, when you detect that the message should be handled by the default control, and should not be handled by any other control in the chain of windows that execute PreTranslateMessage. This is also helpful if you have a combo box open and want the Page Down/Up handled internally and not by the view or any accelerator.
I've handled the delete key in the PreTranslateMessage as follows:
BOOL PreTranslateMessage(MSG* pMsg)
{
if(WM_KEYDOWN == pMsg->message && VK_DELETE == pMsg->wParam)
{
int iStartChar = -1, iEndChar = -1;
GetSel(iStartChar, iEndChar);
if(iStartChar != iEndChar)
Clear(); //clear the selected text
else
{
SetSel(iStartChar, iStartChar + 1);
Clear();
}
}
return CMFCToolBarComboBoxEdit::PreTranslateMessage(pMsg);
}
I have to show the saving message box until timeout.
Once the timeout happens go to slot and do some function.
timerToSave=new QTimer(this);
connect(timerToSave,SIGNAL(timeout()),this,SLOT(SavingStatusSlot()));
Above code is the timer, when timeout moves to the saveslot.
bool PopUpManager::PopUpSaveStaus()
{
timerToSave->start(3000);
saveStatus=false;
if(SetThread::getInstance()->UISaveStatus==ST_PROCESSING)
{
msgBox = new QMessageBox(0);
msgBox->setModal(true);
msgBox->setText("Saving ... ");
msgBox->setIcon(QMessageBox::Information);
msgBox->setStandardButtons(QMessageBox::Ok);
msgBox->setCursor(Qt::WaitCursor);
msgBox->setWindowFlags(Qt::FramelessWindowHint| Qt::WindowStaysOnTopHint);
msgBox->setStyleSheet("background-color:#444;color:#FFF;outline:none;");
msgBox->exec();
}
else
SavingStatusSlot();
return saveStatus;
}
Above method called from other classes, when the user click on the save button.
once the method called, starting the timer then displaying the message box.
if timeout happens calling slot [given below]
void PopUpManager::SavingStatusSlot()
{
msgBox->button(QMessageBox::Ok)->animateClick();
timerToSave->stop();
if(SetThread::getInstance()->UISaveStatus==ST_OK)
{
saveStatus=true;
}
else
{
PopUpWithOKButton(" Saving Error ");
saveStatus=false;
}
}
this code is working, I have used the message box with OK button and when the timeout creating the animated click and doing some function.
Now I want to show the Message box without button and when timeout, close the message box then do some function
But the Message box close() is not working.
void PopUpManager::ClosePopUP()
{
if(msgBox->isEnabled())
msgBox->close();
}
if I call the above code the message box has to close, but it is displaying.
Can anyone help me on this.
Thanks in advance.
I have solved the issue
used msgBox->show(); instead of the msgBox->exec();
and msgBox->hide(); insted of msgBox->close();
code is given below.
bool PopUpManager::PopUpSaveStaus()
{
timerToSave->start(3000);
saveStatus=false;
if(UISaveStatus==ST_PROCESSING)
{
msgBox = new QMessageBox(QMessageBox::Information,"Error","Processing ... ",0,0,Qt::FramelessWindowHint| Qt::WindowStaysOnTopHint);
msgBox->setStandardButtons(0);
msgBox->setCursor(Qt::WaitCursor);
msgBox->setStyleSheet("background-color:#444;color:#FFF;outline:none;");
msgBox->show();
}
else
{
SavingStatusSlot();
}
return saveStatus;
}
void PopUpManager::SavingStatusSlot()
{
msgBox->hide();
timerToSave->stop();
if(UISaveStatus==ST_OK)
{
saveStatus=true;
}
else
{
PopUpWithOKButton(" communication Failed ");
saveStatus=false;
}
}
i'm trying to simply fill a progress bar, full when a check box is checked, and empty when the box is unchecked. there is an ONCLICK action for the check box, so i figured i would check the value every time it was clicked, and would fill the bar only when it was checked.
this code includes a couple different things i tried, anything with progCtrl gave me a runtime error. any thoughts would be helpful, thanks!
void Cgui1Dlg::OnBnClickedsetkill()
{
// TODO: Add your control notification handler code here
//IDC_PROGRESS.Value = 100;
//CProgressCtrl progCtrl;
//progCtrl.SetDlgCtrlID(IDC_PROGRESS);
//UpdateData();
//if(changefill)
//{
//IDC_PROGRESS.PBM_SETPOS(100);
//SendMessage(IDC_PROGRESS, PBM_SETPOS, 100);
//progCtrl.SetPos(100);
//}
//else
//{
//filled = FALSE;
//}
UpdateData(FALSE);
}
I would create a control variable for the progress control and the check button. Then, do:
void Cgui1Dlg::OnBnClickedsetkill()
{
if(c_Check.GetCheck()==BST_CHECKED)
{
c_Progress.SetPos(100);
}
else
{
c_Progress.SetPos(0);
}
}