I am learning MFC C++ and found a problem with MDI tabbed menu. Even my application is a MDI style but I can not see document list drop-list menu. Please help me! Thanks in advance!
I have tried to change values in CMDITabInfo but nothing happens...
CMDITabInfo mdiTabParams;
mdiTabParams.m_style = CMFCTabCtrl::STYLE_3D_ONENOTE; // other styles available...
mdiTabParams.m_bActiveTabCloseButton = TRUE; // set to FALSE to place close button at right of tab area
mdiTabParams.m_bTabIcons = FALSE; // set to TRUE to enable document icons on MDI taba
mdiTabParams.m_bAutoColor = TRUE; // set to FALSE to disable auto-coloring of MDI tabs
mdiTabParams.m_bDocumentMenu = TRUE; // enable the document menu at the right edge of the tab area
EnableMDITabbedGroups(TRUE, mdiTabParams);
On ending of your CMainFrame::OnCreate you can write:
EnableMDITabs(TRUE, TRUE, CMFCBaseTabCtrl::LOCATION_TOP, TRUE,
CMFCTabCtrl::STYLE_3D_SCROLLED, FALSE,
FALSE);
CMFCTabCtrl& MFCTabCtrl = GetMDITabs();
MFCTabCtrl.EnableTabSwap(TRUE);
MFCTabCtrl.EnableTabDocumentsMenu(TRUE);
MFCTabCtrl.EnableAutoColor(FALSE);
This ensure you what you need.
QTextEdit and similar widgets embedded in QGraphicsScene lose focus after using standard context menu (copy/paste), i. e. you need to click on QTextEdit again to continue editing. Scene emits focusItemChanged with newFocusItem==0.
First question: Is it a bug or standard behavior?
My investigation shows that function QGraphicsItemPrivate::setVisibleHelper() clears focus here:
if (hasFocus && scene) {
// Hiding the focus item or the closest non-panel ancestor of the focus item
QGraphicsItem *focusItem = scene->focusItem();
bool clear = true;
if (isWidget && !focusItem->isPanel()) {
do {
if (focusItem == q_ptr) {
clear = !static_cast<QGraphicsWidget *>(q_ptr)->focusNextPrevChild(true);
break;
}
} while ((focusItem = focusItem->parentWidget()) && !focusItem->isPanel());
}
if (clear)
clearFocusHelper(/* giveFocusToParent = */ false, hiddenByPanel);
}
QGraphisItem has undocumented (internal) flag QGraphicsItem::ItemIsFocusScope. If the flag is set for QTextEdit's proxy-item it gets focus back after menu, but in any case focus cleared at first and after that Item receives it again or not.
Second Question: What is flag QGraphicsItem::ItemIsFocusScope for?
Looks like QGraphicsItem::ItemIsFocusScope is for FocusScope QML item. QtQuick1 is QGraphicsScene based and used that flag.
I'm not sure about side effects but that helps:
auto edit = new QLineEdit();
auto item = scene->addWidget(edit);
item->setFlag(QGraphicsItem::GraphicsItemFlag::ItemIsPanel);
Tested on Qt 5.9, Linux
EDIT
For me looks as bug:
add QLineEdit to scene
click to focus QLineEdit
hit ContextMenu key to show context menu
hit Esc key to exit context menu
try to type
Expected: QLineEdit is focused and text appears
Actual: QLineEdit lost input focus
Please find it or report with Qt bug tracker
So it's OK to have workaround using QGraphicsItem::ItemIsFocusScope flag for example.
#if (QT_VERSION < QT_VERSION_CHECK(<fixed in Qt version>))
// it's workaround of bug QTBUG-...
# if (QT_VERSION == QT_VERSION_CHECK(<version you are develop with>)
item.setFlag(QGraphicsItem::ItemIsFocusScope);
# else
# error("The workaround is not tested on this version of Qt. Please run tests/bug_..._workaround_test")
# endif
I create a sliding menu and i want to open it using ( ... ) but i try alot to change the icon which is(<-).
this my code .
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.drawable.ic_drawer1, //nav menu toggle icon
R.string.app_name, // nav drawer open - description for accessibility
R.string.app_name // nav drawer close - description for accessibility
) {
public void onDrawerClosed(View view) {
getActionBar().setTitle("hello");
// calling onPrepareOptionsMenu() to show action bar icons
invalidateOptionsMenu();
}
public void onDrawerOpened(View drawerView) {
getActionBar().setTitle("ohhh");
// calling onPrepareOptionsMenu() to hide action bar icons
invalidateOptionsMenu();
}
};
// getSupportActionBar().setDisplayShowHomeEnabled(true);
// getActionBar().setHomeButtonEnabled(true);
//getSupportActionBar().setIcon(R.drawable.ic_drawer1);
getSupportActionBar().setIcon(R.drawable.ic_drawer1);
getSupportActionBar().setDisplayUseLogoEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
It has been asked already. Try to change in manifest file to change your app logo or if it doesn't work then try this link. Android: How to change the ActionBar "Home" Icon to be something other than the app icon?. This might help.
I want to make my app laptop friendly. I can tab to everywhere, but if I tab to a QPushButton I can't press it with Enter, only with space.
What's the problem? How to make it pressable for Enter?
tl;dr
In the Qt Creator's UI view, select the button you want to make pressable for Enter.
In the right side at the Property Editor scroll down to the blue part titled QPushButton.
Check the checkbox by autoDefault or default.
Most of the cases the main different between autoDefault and default is how the button will be rendered. But there are cases where it can cause unexpected things so for more information read more below.
Full review
Overview
Every QPushButton has 3 properties that are not inherited. From these, two (default and autoDefault) have a major role when we place buttons on QDialogs, because these settings (and the focus on one of the buttons) decides which button will be pressed if we hit Enter.
All of these properties are set false by default. Only expection is autoDefault that will be true if the button has a QDialog parent.
Every time you press space the button with the focus on it will be pressed. The followings will describe what happens if you press Enter.
Default property
If this is set true, the button will be a default button.
If Enter is pressed on the dialog, than this button will be pressed, except when the focus is on an autoDefault button.
There should be only one default button. If you add more then the last one added will be the default button.
AutoDefault property
If this is set true, the button will be an autoDefault button.
If Enter is pressed on the dialog, than this button will be pressed if the focus is on it.
If the focus is not on an autoDefault button and there is no default button than the next autoDefault button will be pressed for Enter.
Flat property
If this is set true, then the border of the button will not be raised.
Example tables
The following tables show which button will be pressed with different buttons on different focus. The buttons are added from left to right.
Test code
The following code is a way to add buttons to a dialog. It can be used for testing by changing the boolean values at setDefault() and/or setAutoDefault().
You just need to create a window, add a QPushButton called pushButton and a QLabel called label (that is the default naming). Don't forget to #include <QMessageBox>. Then copy this code to the button's clicked() signal:
void MainWindow::on_pushButton_clicked()
{
QMessageBox msgBox;
QPushButton button("Button");
button.setDefault(false);
button.setAutoDefault(false);
msgBox.addButton(&button, QMessageBox::ActionRole);
QPushButton autodefaultbutton("AutoDefault Button");
autodefaultbutton.setDefault(false);
autodefaultbutton.setAutoDefault(true);
msgBox.addButton(&autodefaultbutton, QMessageBox::ActionRole);
QPushButton autodefaultbutton2("AutoDefault Button2");
autodefaultbutton2.setDefault(false);
autodefaultbutton2.setAutoDefault(true);
msgBox.addButton(&autodefaultbutton2, QMessageBox::ActionRole);
QPushButton defaultbutton("Default Button");
defaultbutton.setDefault(true);
defaultbutton.setAutoDefault(false);
msgBox.addButton(&defaultbutton, QMessageBox::ActionRole);
msgBox.exec();
if (msgBox.clickedButton() == &button) {
ui->label->setText("Button");
} else if (msgBox.clickedButton() == &defaultbutton) {
ui->label->setText("Default Button");
} else if (msgBox.clickedButton() == &autodefaultbutton) {
ui->label->setText("AutoDefault Button");
} else if (msgBox.clickedButton() == &autodefaultbutton2) {
ui->label->setText("AutoDefault Button2");
}
}
Display
If you compile the code you can get this window. You doesn't even have to click to the buttons because the way they are rendered by the OS shows which one will be pressed if you hit Enter or space.
Official documentation
Most of this answer was made according to the official documentation.
The QPushButton documentation made by Qt states these:
Default and autodefault buttons decide what happens when the user
presses enter in a dialog.
A button with this property set to true (i.e., the dialog's default
button,) will automatically be pressed when the user presses enter,
with one exception: if an autoDefault button currently has focus, the
autoDefault button is pressed. When the dialog has autoDefault buttons
but no default button, pressing enter will press either the
autoDefault button that currently has focus, or if no button has
focus, the next autoDefault button in the focus chain.
In a dialog, only one push button at a time can be the default button.
This button is then displayed with an additional frame (depending on
the GUI style).
The default button behavior is provided only in dialogs. Buttons can
always be clicked from the keyboard by pressing Spacebar when the
button has focus.
If the default property is set to false on the current default button
while the dialog is visible, a new default will automatically be
assigned the next time a pushbutton in the dialog receives focus.
It's also worth to check QDialog and QMessageBox.
According to Qt's documentation Enter should work
Command buttons in dialogs are by default auto-default buttons, i.e. they become the default push button automatically when they receive the keyboard input focus. A default button is a push button that is activated when the user presses the Enter or Return key in a dialog. You can change this with setAutoDefault().
http://qt-project.org/doc/qt-4.8/qpushbutton.html
totymedli's answer is great. I added a small program to test various combinations of isDefault, autoDefault, setDefault and setAutoDefault functions.
import sys
from PyQt4.QtGui import *
from PyQt4.QtCore import *
class Window(QDialog):
def __init__(self, parent=None):
super(Window, self).__init__(parent)
autoDefaultInitialState = True
defaultInitialState = False
self.lineEdit1 = QLineEdit(self)
self.lineEdit2 = QLineEdit(self)
self.lineEdit3 = QLineEdit(self)
# if we create a new button (e.g. "Print state"), with the same function,
# it doesn't work, because adding a new button (apart from our 3 buttons)
# produces total mess, so we use this lineedit for this purpose
self.lineEdit1.returnPressed.connect(self.printState)
#------------------------------------
self.chkAutoDefaultOk = QCheckBox('OK setAutoDefault', self)
self.chkAutoDefaultCancel = QCheckBox('Cancel setAutoDefault', self)
self.chkAutoDefaultApply = QCheckBox('Apply setAutoDefault', self)
self.chkDefaultOk = QCheckBox('OK setDefault', self)
self.chkDefaultCancel = QCheckBox('Cancel setDefault', self)
self.chkDefaultApply = QCheckBox('Apply setDefault', self)
self.chkAutoDefaultOk.setChecked(autoDefaultInitialState)
self.chkAutoDefaultCancel.setChecked(autoDefaultInitialState)
self.chkAutoDefaultApply.setChecked(autoDefaultInitialState)
self.chkDefaultOk.setChecked(defaultInitialState)
self.chkDefaultCancel.setChecked(defaultInitialState)
self.chkDefaultApply.setChecked(defaultInitialState)
#------------------------------------
self.pushButtonOk = QPushButton(self)
self.pushButtonOk.setText("Ok")
self.pushButtonOk.clicked.connect(lambda : print('ok'))
self.pushButtonCancel = QPushButton(self)
self.pushButtonCancel.setText("Cancel")
self.pushButtonCancel.clicked.connect(lambda : print('cancel'))
self.pushButtonApply = QPushButton(self)
self.pushButtonApply.setText("Apply")
self.pushButtonApply.clicked.connect(lambda : print('apply'))
#------------------------------------
self.pushButtonOk.setAutoDefault(autoDefaultInitialState)
self.pushButtonCancel.setAutoDefault(autoDefaultInitialState)
self.pushButtonApply.setAutoDefault(autoDefaultInitialState)
self.pushButtonOk.setDefault(defaultInitialState)
self.pushButtonCancel.setDefault(defaultInitialState)
self.pushButtonApply.setDefault(defaultInitialState)
#------------------------------------
self.chkAutoDefaultOk.stateChanged.connect(self.chkChangeState)
self.chkAutoDefaultCancel.stateChanged.connect(self.chkChangeState)
self.chkAutoDefaultApply.stateChanged.connect(self.chkChangeState)
self.chkDefaultOk.stateChanged.connect(self.chkChangeState)
self.chkDefaultCancel.stateChanged.connect(self.chkChangeState)
self.chkDefaultApply.stateChanged.connect(self.chkChangeState)
#------------------------------------
self.layout = QGridLayout(self)
self.layout.addWidget(self.lineEdit1, 0, 0, 1, 3)
self.layout.addWidget(self.lineEdit2, 1, 0, 1, 3)
self.layout.addWidget(self.lineEdit3, 2, 0, 1, 3)
self.layout.addWidget(self.chkAutoDefaultOk, 3, 0)
self.layout.addWidget(self.chkAutoDefaultCancel, 3, 1)
self.layout.addWidget(self.chkAutoDefaultApply, 3, 2)
self.layout.addWidget(self.chkDefaultOk, 4, 0)
self.layout.addWidget(self.chkDefaultCancel, 4, 1)
self.layout.addWidget(self.chkDefaultApply, 4, 2)
self.layout.addWidget(self.pushButtonOk, 5, 0)
self.layout.addWidget(self.pushButtonCancel, 5, 1)
self.layout.addWidget(self.pushButtonApply, 5, 2)
def chkChangeState(self):
obj = self.sender()
if (obj == self.chkAutoDefaultOk):
self.pushButtonOk.setAutoDefault(self.chkAutoDefaultOk.isChecked())
elif (obj == self.chkAutoDefaultCancel):
self.pushButtonCancel.setAutoDefault(self.chkAutoDefaultCancel.isChecked())
elif (obj == self.chkAutoDefaultApply):
self.pushButtonApply.setAutoDefault(self.chkAutoDefaultApply.isChecked())
elif (obj == self.chkDefaultOk):
self.pushButtonOk.setDefault(self.chkDefaultOk.isChecked())
elif (obj == self.chkDefaultCancel):
self.pushButtonCancel.setDefault(self.chkDefaultCancel.isChecked())
elif (obj == self.chkDefaultApply):
#print('sender: self.chkDefaultApply')
#print('before: ', self.pushButtonApply.isDefault())
self.pushButtonApply.setDefault(self.chkDefaultApply.isChecked())
#print('after: ', self.pushButtonApply.isDefault())
def printState(self):
print(self.pushButtonOk.autoDefault(), self.pushButtonCancel.autoDefault(), self.pushButtonApply.autoDefault())
print(self.pushButtonOk.isDefault(), self.pushButtonCancel.isDefault(), self.pushButtonApply.isDefault())
print('-' * 50)
app = QApplication(sys.argv)
main = Window()
main.show()
sys.exit(app.exec_())
Set the tab order for your widgets. This will allow usage of return key for clicking. Its in there by default inside Qt.
Here is what I'm doing. I'v created a combobox but I'm not using it for that. When I click it, it calls trackpopup and brings up a context menu. However after I'v clicked the context menu, I'd like it to close the combobox in the same way it would if you clicked anywhere (killing the focus) or selected an item from the combobox.
Here's the event for the combobox:
if(uMsg == WM_COMMAND)
{
HMENU m;
m = CreatePopupMenu();
MENUITEMINFO itm;
itm.cbSize = sizeof(MENUITEMINFO);
itm.fMask = MIIM_FTYPE | MIIM_STRING;
itm.fType = MIIM_STRING;
itm.dwTypeData = "Kill time";
itm.cch = 12;
POINT p;
GetCursorPos(&p);
InsertMenuItem(m,4,false,&itm);
if((int)HIWORD(wParam) == CBN_DROPDOWN)
{
SendMessage(engineGL.controls.TopSelHwnd,WM_KILLFOCUS,(WPARAM)engineGL.controls.TopSelHwnd,0);
SendMessage(engineGL.controls.TopSelHwnd,WM_IME_SETCONTEXT,(WPARAM)0,(LPARAM)ISC_SHOWUIALL);
TrackPopupMenu(m,0,p.x,p.y,NULL,hWnd,NULL);
SendMessage(hWnd,WM_KILLFOCUS,0,0);
SetFocus(HWND_DESKTOP);
}
return 1;
}
How can I make it so that after I click an item on the context menu, the combobox closes properly as if I'd actually chosen an item from it?
Thanks
I'm not sure. Need to try your code.
However I'm sure that one should not send the WM_KILLFOCUS message manually. Instead you need to set the focus to another window by calling SetFocus. The OS will automatically send messages to the window losing the focus and the new window that is gaining the focus.