I am working with qt 3.3. I need to make QDialog widget with null parent always visible not stays on top (WStyle_StaysOnTop) because this flag block access for main application. I need on screen keyboard functionality for my QDialog widget.
I hope I correctly understood the question. Here is a minimal example of what u want.
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
QDialog *dia = new QDialog(this);
//Set the windowflags
dia->setWindowFlags(dia->windowFlags() | Qt::Tool);
dia->show();
QWidget *central = new QWidget;
QHBoxLayout *mainLayout = new QHBoxLayout;
QLineEdit *edit = new QLineEdit;
//Add sample QLineEdit to test the input focus for mainwindow
mainLayout->addWidget(edit);
central->setLayout(mainLayout);
setCentralWidget(central);
}
edit:
If you want to be able to minimize and maximize the dialog in question from systray you have to create the QSystrayIcon and context menu for it:
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
QDialog *dia = new QDialog(this);
dia->setWindowFlags(dia->windowFlags() | Qt::Tool);
dia->show();
QWidget *central = new QWidget;
QHBoxLayout *mainLayout = new QHBoxLayout;
QLineEdit *edit = new QLineEdit;
mainLayout->addWidget(edit);
central->setLayout(mainLayout);
setCentralWidget(central);
//Create the icon for systray
//NOTE this icon is application wide
QSystemTrayIcon *icon = new QSystemTrayIcon(QIcon(QPixmap("/usr/share/icons/oxygen/22x22/status/user-away.png")), dia);
icon->setVisible(true);
//Create context menu to manipulate the dialog
QMenu *contextMenu = new QMenu;
QAction *minimizeDialog = contextMenu->addAction("Minimize dialog");
QAction *restoreDialog = contextMenu->addAction("Restore dialog");
connect(minimizeDialog, SIGNAL(triggered()), dia, SLOT(hide()));
connect(restoreDialog, SIGNAL(triggered()), dia, SLOT(show()));
//Add it to the icon
icon->setContextMenu(contextMenu);
}
Related
I am trying to draw various shapes like rectangle, ellipse, text etc uisng QGraphicsView and QGraphicsScene. For that I am trying to create an interface where there will be a vertical layout and besides that there will be few buttons. On clicking those buttons, I can show various QGraphicsItem's on screen. I want to create this interface programatically but not using ui.
I tried and ended up this way.
I wanted buttons on the right side and verticalLayout on the left side and both should filled up the whole screen.
Here is my current implementation :
Widget::Widget(QWidget *parent)
: QWidget(parent)
, ui(new Ui::Widget)
{
ui->setupUi(this);
QGraphicsScene* scene = new QGraphicsScene(this);
QGraphicsView* view = new QGraphicsView(this);
view->setScene(scene);
QWidget* mainWidget = new QWidget(this);
QHBoxLayout *mainLayout = new QHBoxLayout();
QVBoxLayout *buttonLayout = new QVBoxLayout();
QVBoxLayout *vlayout2 = new QVBoxLayout();
vlayout2->addWidget(view);
QPushButton *btn1 = new QPushButton("Rectangle");
btn1->setSizePolicy( QSizePolicy::Expanding, QSizePolicy::Preferred );
QPushButton *btn2 = new QPushButton("Ellipse");
btn2->setSizePolicy( QSizePolicy::Expanding, QSizePolicy::Preferred );
QPushButton *btn3 = new QPushButton("Text");
btn3->setSizePolicy( QSizePolicy::Expanding, QSizePolicy::Preferred );
buttonLayout->addWidget(btn1);
buttonLayout->addWidget(btn2);
buttonLayout->addWidget(btn3);
buttonLayout->addStretch();
mainLayout->addLayout(buttonLayout);
mainLayout->addLayout(vlayout2);
mainWidget->setLayout(mainLayout);
}
Can anyone guide me ?
Actually, it should work with the hints given in my comments.
I made an MCVE to convince myself:
#include <QtWidgets>
int main(int argc, char **argv)
{
qDebug() << "Qt Version:" << QT_VERSION_STR;
QApplication app(argc, argv);
// setup GUI
QWidget qMain;
qMain.setWindowTitle("Test Box Layout");
qMain.resize(640, 320);
QHBoxLayout qHBox;
QVBoxLayout qVBoxBtns;
QPushButton qBtnRect("Rectangle");
qVBoxBtns.addWidget(&qBtnRect);
QPushButton qBtnCirc("Circle");
qVBoxBtns.addWidget(&qBtnCirc);
QPushButton qBtnText("Text");
qVBoxBtns.addWidget(&qBtnText);
qVBoxBtns.addStretch();
qHBox.addLayout(&qVBoxBtns);
QVBoxLayout qVBoxView;
QGraphicsView qView;
qVBoxView.addWidget(&qView, 1);
qHBox.addLayout(&qVBoxView, 1);
qMain.setLayout(&qHBox);
qMain.show();
// runtime loop
return app.exec();
}
Output:
Thus, there must be something else in OP's code…
Unfortunately, OP didn't expose an MCVE.
Thus, it's not clear how OP's Widget is instanced. Is it the widget which becomes the main window? Is there another widget where the Widget's instance becomes child of?
It's just guessing but the latter would explain what OP described.
To confirm my guess, I modified the above code a bit:
// setup GUI
QWidget qMain0; // main window widget
QWidget qMain(&qMain0); // child widget of main window widget
⋮
qMain.setLayout(&qHBox);
qMain0.show();
// runtime loop
return app.exec();
Please, note that qMain is now a child of qMain0 but there is no layout which adjusts the size of qMain when qMain0 is resized.
Hence, the size of view stays the initial size while the window is resized.
I want to be able to change page of QStackedWidget with some kind of animation (like fade in/out or others...)
after some research I find out maybe its possible with QGraphicsOpacityEffect, then I found this codes in here
Fade In Your Widget
// w is your widget
QGraphicsOpacityEffect *eff = new QGraphicsOpacityEffect(this);
w->setGraphicsEffect(eff);
QPropertyAnimation *a = new QPropertyAnimation(eff,"opacity");
a->setDuration(350);
a->setStartValue(0);
a->setEndValue(1);
a->setEasingCurve(QEasingCurve::InBack);
a->start(QPropertyAnimation::DeleteWhenStopped);
Fade Out Your Widget
// w is your widget
QGraphicsOpacityEffect *eff = new QGraphicsOpacityEffect(this);
w->setGraphicsEffect(eff);
QPropertyAnimation *a = new QPropertyAnimation(eff,"opacity");
a->setDuration(350);
a->setStartValue(1);
a->setEndValue(0);
a->setEasingCurve(QEasingCurve::OutBack);
a->start(QPropertyAnimation::DeleteWhenStopped);
connect(a,SIGNAL(finished()),this,SLOT(hideThisWidget()));
// now implement a slot called hideThisWidget() to do
// things like hide any background dimmer, etc.
but looks like these codes have some problem when used in QWidget inside of QStackedWidget i mean widget successfully fade in and out, but after animation finish if I minimize the windows the widget will disappear completely! (Im still able to see widget in bottom right corner of my window, looks like its pos changed?!)
btw my program is frameless.
thanks for help.
here is a example from my problem
test.cpp
Test::Test(QWidget *parent)
: CustomMainWindow(parent)
{
ui.setupUi(this);
setShadow(ui.bg_app);
connect(ui.close_app_btn, &QPushButton::clicked, this, &QWidget::close);
connect(ui.minimize_app_btn, &QPushButton::clicked, this, &QWidget::showMinimized);
QGraphicsOpacityEffect* eff = new QGraphicsOpacityEffect(this);
ui.checking->setGraphicsEffect(eff); // checking is my widget inside of QStackedWidget.
QPropertyAnimation* a = new QPropertyAnimation(eff, "opacity");
a->setDuration(350);
a->setStartValue(0);
a->setEndValue(1);
a->setEasingCurve(QEasingCurve::InBack);
a->start(QPropertyAnimation::DeleteWhenStopped);
}
CustomMainWindow.cpp
CustomMainWindow::CustomMainWindow(QWidget *parent)
: QMainWindow(parent)
{
setWindowFlags(windowFlags() | Qt::Window | Qt::FramelessWindowHint | Qt::WindowSystemMenuHint);
setAttribute(Qt::WA_TranslucentBackground);
}
void CustomMainWindow::setShadow(QWidget* window)
{
QGraphicsDropShadowEffect* windowShadow = new QGraphicsDropShadowEffect;
windowShadow->setBlurRadius(9.0);
windowShadow->setColor(palette().color(QPalette::Highlight));
windowShadow->setOffset(0.0);
window->setGraphicsEffect(windowShadow);
}
when I run my program with this code, at first its successfully Fade In, but if I for example minimize the window the widget move from its original position to somewhere else, look at this gif
Note: MainWindow is the name of my class.
Header file:
//...
private slots:
void animationStackedWidgets();
void whenAnimationFinish();
//....
CPP file:
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
connect(ui->button, &QPushButton::clicked, this, &MainWindow::animationStackedWidgets);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::animationStackedWidgets()
{
QGraphicsOpacityEffect *effect = new QGraphicsOpacityEffect(this);
ui->stackedWidget->setGraphicsEffect(effect);
QPropertyAnimation *anim = new QPropertyAnimation(effectSw,"opacity");
anim->setDuration(350);
anim->setStartValue(0);
anim->setEndValue(1);
anim->setEasingCurve(QEasingCurve::InBack);
anim->start(QPropertyAnimation::DeleteWhenStopped);
connect(anim, SIGNAL(finished()), this, SLOT(whenAnimationFinish()));
}
void MainWindow::whenAnimationFinish()
{
ui->stackedWidget->setGraphicsEffect(0); // remove effect
}
How to add a subwindow inside QPlainTextEdit?
I try it:
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
{
this->setFixedSize(800,600);
mainW = new QWidget(this);
mainW->setGeometry(0,0, 800, 600);
QGridLayout* lay = new QGridLayout(mainW);
QPlainTextEdit* te = new QPlainTextEdit(mainW);
QPlainTextEdit* te2 = new QPlainTextEdit(mainW);
mdiArea = new QMdiArea(te);
QWidget *widget = new QWidget(mdiArea);
QGridLayout *gridLayout = new QGridLayout(widget);
widget->setLayout(gridLayout);
QLabel *label = new QLabel("Hello, I am sub window!!!", widget);
gridLayout->addWidget(label);
mdiArea->addSubWindow(widget);
widget->setWindowTitle("Sub Window");
widget->show();
}
Layout of subwindow overlaps a QPlainTextEdit. How can you avoid this?
I am trying to create an expandable Qt dialog application. The main layout is a QVBoxLayout. The top part has two views and a QPushButtonbutton. Clicking button will unfold the bottom widget which is initially hidden. In the bottom widget, there is another push button, which could fold (hide) the bottom widget. When the bottom widget fold/unfold, I expect the size of the dialog size to change as well.
But for some reason, the dialog size only increases when the bottom widget is unfolded. And never shrink back to (200, 100). Is there anything I missed?
Environment: Qt Creator 3.6.1; Based on Qt5.6.0 (MSVC2013 32bit); build on Mar 14 2016; revision d502727b2c
The code I am using :
Dialog::Dialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::Dialog)
{
ui->setupUi(this);
QTreeView *tree = new QTreeView;
QTableView *table = new QTableView;
QPushButton *button_show = new QPushButton;
button_show->setText(tr("Show hidden panel"));
QHBoxLayout *layout_top = new QHBoxLayout;
layout_top->addWidget(tree);
layout_top->addWidget(table);
layout_top->addWidget(button_show);
QHBoxLayout *layout_bottom = new QHBoxLayout;
QTextEdit *editor = new QTextEdit;
QPushButton *button_hide = new QPushButton;
button_hide->setText(tr("Hide the bottom panel"));
g_pEditor = editor;
layout_bottom->addWidget(editor);
layout_bottom->addWidget(button_hide);
QWidget *panel = new QWidget;
panel->setLayout(layout_bottom);
QVBoxLayout *layout_main = new QVBoxLayout;
layout_main->addLayout(layout_top);
layout_main->addWidget(panel);
setLayout(layout_main);
panel->hide();
connect(button_show, &QPushButton::clicked
, panel
, [=]()
{
panel->setVisible(true);
button_show->setEnabled(false);
resize(200, 200);// not really working, the dialog size is able to increase without calling resize()
});
connect(button_hide, &QPushButton::clicked, panel, [=]()
{
panel->hide();
button_show->setEnabled(true);
resize(200,100);// does not shrink the dialog size*
});
resize(200,100);
}
Thanks for your help :)
Your should try setFixedSize(w, h) instead. This sets both, the minimum and the maximum size to (w, h). "This will override the default size constraints set by QLayout."
I have a QStackedWidget with a custom widget in it.
//mainwindow.h
private:
CentralWidget m_centralWidget;
//mainwindow.cpp
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
ui->stackedWidget->addWidget(&m_centralWidget);
}
Now i want to create a QSplitter, fill the Splitter with content and add this Splitter to the StackedWidget.
CentralWidget::CentralWidget(QWidget *parent) :
QWidget(parent),
ui(new Ui::CentralWidget)
{
ui->setupUi(this);
connect(ui->pbAddSplit, SIGNAL(pressed()), this, SLOT(addSplit()));
}
void CentralWidget::addSplit()
{
QWidget* parent = parentWidget();
QStackedWidget* stackedWidget = qobject_cast<QStackedWidget*>(parent);
if(!stackedWidget) {
return;
}
QSplitter* splitter = new QSplitter(Qt::Vertical);
splitter->addWidget(new QLabel("Banana"));
splitter->addWidget(this);
int nIndex = stackedWidget->addWidget(splitter);
stackedWidget->setCurrentIndex(nIndex);
}
The result should be a QLabel("Banana") as one Widget of the splitter and the CentralWidget as the other splitter-widget.
But i just get the QLabel("Banana") - SplitterHandle and the CentralWidget got lost somehow...
splitter->addWidget(this) is obviously wrong...
Replacing it with splitter->addWidget(new QLabel("Cherry")) will result in a correct SplitterWidget...
The problem seems to be the parenting, but i cant figure it out.
Any suggestions would be most welcome!