I'm making a little app for applying various filters on an image using Qt and C++.
My question is, is it possible to add multiple widgets on a QDockWidget ?
As i want to add buttons for re-applying the last 5 filters on the dock.
Here is an example of what i want to achieve.
It is possible add to multiple QWidgets into any QWidget.
It looks like you probably want to do something like this:
QDockWidget dock(QLatin1String("Last filters"));
QWidget* multiWidget = new QWidget();
QVBoxLayout* layout = new QVBoxLayout();
QPushButton* filter1 = new QPushButton(QLatin1String("Filter number 1"));
QPushButton* filter2 = new QPushButton(QLatin1String("Filter number 2"));
QPushButton* filter3 = new QPushButton(QLatin1String("Filter number 3"));
QPushButton* filter4 = new QPushButton(QLatin1String("Filter number 4"));
QPushButton* filter5 = new QPushButton(QLatin1String("Filter number 5"));
QLabel* label = new QLabel(QLatin1String("QPushButtons"));
layout->addWidget(filter1);
layout->addWidget(filter2);
layout->addWidget(filter3);
layout->addWidget(filter4);
layout->addWidget(filter5);
layout->addWidget(label);
multiWidget->setLayout(layout);
dock.setWidget(multiWidget);
Related
I want to make a QLable and a QComboBox display in one line (horizontal, let's name it as h_combination_1), and there are some similar layouts like this (e.g. h_combination_2, h_combination_3, and etc). Then I want to manage this combinations (h_combination_1..3) display vertially. But at last these combinations display horizontally, how strange it is! Could someone help me with this?
Here is the code:
void ThemeWidget::initLayout()
{
[..]
QHBoxLayout* themeLayout = new QHBoxLayout;
QLabel* themeLabel = new QLabel("Theme");
themeLayout->addWidget(themeLabel);
themeLayout->addWidget(cbox_theme);
QHBoxLayout* legendLayout = new QHBoxLayout;
QLabel* legendLabel = new QLabel("Legend");
themeLayout->addWidget(legendLabel);
themeLayout->addWidget(cbox_legend);
QHBoxLayout* animationLayout = new QHBoxLayout;
QLabel* animationLabel = new QLabel("Animation");
themeLayout->addWidget(animationLabel);
themeLayout->addWidget(cbox_animation);
antialiasCheckBox = new QCheckBox("Antialiasing");
[..]
QVBoxLayout* parametersLayout = new QVBoxLayout;
parametersLayout->addLayout(themeLayout);
parametersLayout->addLayout(legendLayout);
parametersLayout->addLayout(animationLayout);
parametersLayout->addWidget(antialiasCheckBox);
QWidget* paramsBox = new QWidget();
paramsBox->setLayout(parametersLayout);
gridLayout = new QGridLayout;
QHBoxLayout* layout = new QHBoxLayout;
layout->addLayout(gridLayout);
layout->addWidget(paramsBox);
this->setLayout(layout);
}
Here is a screenshot:
In the begining, I've just add the layout parametersLayout to layout, without binding it to a QWidget.
For example:
void ThemeWidget::initLayout()
{
[..]
QVBoxLayout* parametersLayout = new QVBoxLayout;
parametersLayout->addLayout(themeLayout);
parametersLayout->addLayout(legendLayout);
parametersLayout->addLayout(animationLayout);
parametersLayout->addWidget(antialiasCheckBox);
gridLayout = new QGridLayout;
QHBoxLayout* layout = new QHBoxLayout;
layout->addLayout(gridLayout);
layout->addWidget(parametersLayout);
this->setLayout(layout);
}
But it turned out just as same as binding parametersLayout to a QWidget.
The layoutItems in parametersLayout should be vertical, but there were not!
So I changed into the method I discribed in the details above, and the results was still the same.
I'm getting started with Qt and I have a project for my school. I want to make an interface that read a database of space-stuff and displays them.
Until now I can display the table in a list, and my actual goal is to show the details of the object when it is double clicked.
To do so I tried to open a second dock whenever the object is double clicked, and tried to make a layout inside the second dock to display properly the details.
The program successfuly open a new dock, but the widget are way too small and all packed in the upper left corner of the dock:
picture of the bug:
I tried to do not use layout but only setWidget with QDockWidget, but it does only display the last widget.
Here is my code for the layout:
dock1 = new QDockWidget(tr("Caractéristiques de l'objet : "), this);
dock1->setAllowedAreas(Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea);
QVBoxLayout* layout = new QVBoxLayout();
Nom_Objets = new QLineEdit(dock1);
layout->addWidget(Nom_Objets);
//dock1->setWidget(Nom_Objets);
Categorie_Objets = new QLineEdit(dock1);
layout->addWidget(Categorie_Objets);
//dock1->setWidget(Categorie_Objets);
Description_Objets = new QTextEdit(dock1);
layout->addWidget(Description_Objets);
//dock1->setWidget(Description_Objets);
setLayout(layout);
addDockWidget(Qt::RightDockWidgetArea, dock1);
If you want to add several widgets to a QDockWidget then you must use a QWidget as a container:
dock1 = new QDockWidget(tr("Caractéristiques de l'objet : "), this);
dock1->setAllowedAreas(Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea);
addDockWidget(Qt::RightDockWidgetArea, dock1);
QWidget* container = new QWidget;
dock1->setWidget(container);
QVBoxLayout* layout = new QVBoxLayout(container);
Nom_Objets = new QLineEdit;
Categorie_Objets = new QLineEdit;
Description_Objets = new QTextEdit;
layout->addWidget(Nom_Objets);
layout->addWidget(Categorie_Objets);
layout->addWidget(Description_Objets);
Can I add some widgets like QLabel and QPushButton into a QTabWidget?
Actually, I want to do something like this:
I'm using C++ and Qt.
Thanks
It's possible, just use QTabWidget::setCornerWidget.
Quick example:
QWidget* pTabCornerWidget = new QWidget(this);
QLabel* pLabelTime = new QLabel(pTabCornerWidget);
pLabelTime->setText("10:22:20");
QPushButton* pButton = new QPushButton(pTabCornerWidget);
pButton->setText("?");
pButton->setMaximumSize(QSize(25, 25));
QHBoxLayout* pHLayout = new QHBoxLayout(pTabCornerWidget);
pHLayout->addWidget(pLabelTime);
pHLayout->addWidget(pButton);
mUI.tabWidget->setCornerWidget(pTabCornerWidget, Qt::TopRightCorner);
If you want do this stuff, I recommend you use QTabBar instead of QTabWidget. For example, your code can be (remember, that it's just a very simple example):
// Here some first widget
QWidget *wid1 = new QWidget(this);
QHBoxLayout *wid1Lay = new QHBoxLayout(wid1);
wid1Lay->addWidget(new QLabel(tr("Widget1")));
// Here some second widget
QWidget *wid2 = new QWidget(this);
QHBoxLayout *wid2Lay = new QHBoxLayout(wid2);
wid2Lay->addWidget(new QLabel(tr("Widget2")));
// Here some third widget
QWidget *wid3 = new QWidget(this);
QHBoxLayout *wid3Lay = new QHBoxLayout(wid3);
wid3Lay->addWidget(new QLabel(tr("Widget3")));
// Here your Tab bar with only bars
QTabBar *bar = new QTabBar(this);
bar->addTab("One");
bar->addTab("Two");
bar->addTab("Three");
// Here some label (for example, current time) and button
QLabel *lab = new QLabel(tr("Some text"), this);
QPushButton *but = new QPushButton(tr("Push"), this);
// Main layouts
QVBoxLayout *vLay = new QVBoxLayout(ui->centralWidget);
QHBoxLayout *hLay = new QHBoxLayout();
vLay->addLayout(hLay);
hLay->addWidget(bar);
// Spacer for expanding left and right sides
hLay->addItem(new QSpacerItem(0, 0, QSizePolicy::Expanding, QSizePolicy::Minimum));
hLay->addWidget(lab);
hLay->addWidget(but);
vLay->addWidget(wid1);
vLay->addWidget(wid2);
vLay->addWidget(wid3);
// Some simple connect with lambda for navigation
connect(bar, &QTabBar::currentChanged, [=] (int index) {
wid1->setVisible(false);
wid2->setVisible(false);
wid3->setVisible(false);
switch(index) {
case 0: wid1->setVisible(true);
break;
case 1: wid2->setVisible(true);
break;
case 2: wid3->setVisible(true);
break;
default:{}
}
});
emit bar->currentChanged(0);
I currently have something like this
QLabel* l = new QLabel(this);
l->setTextFormat(Qt::RichText);
l->set_IsSelf(IsSelf);
l->setWordWrap(true);
l->setText("Thissssssssssssssssssssssssssssssss");
l->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Minimum);
l->setMaximumWidth(40);
Now I realize that width is very small and thats ok. What I want is to display all the content and make it expand vertically.
You should insert your label in a layout which it's sizeconstraint is set to QLayout::SetMinimumSize and set the vertical sizepolicy of your label to QSizePolicy::MinimumExpanding :
QVBoxLayout *layout = new QVBoxLayout(this);
layout->setSizeConstraint(QLayout::SetMinimumSize);
QLabel* l = new QLabel;
l->setWordWrap(true);
l->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::MinimumExpanding);
layout->addWidget(l);
i'm having a problem with layouts in Qt. I'm trying to compile this code, with 2 horizontal layouts and a vertical main layout. Each horizontal layout have 3 buttons and both horizontal layout are incorporated in the vertical layout. But after i compile this code, i can only see a small window with just the "Exit" button.
firstline = new QHBoxLayout(this);
secondline = new QHBoxLayout(this);
layout = new QVBoxLayout(this);
eat = new QPushButton("Eat", this);
drink = new QPushButton("Drink", this);
smoke = new QPushButton("Smoke", this);
save = new QPushButton("Save", this);
load = new QPushButton("Load", this);
exit = new QPushButton("Exit", this);
firstline->addWidget(eat);
firstline->addWidget(drink);
firstline->addWidget(smoke);
secondline->addWidget(save);
secondline->addWidget(load);
secondline->addWidget(exit);
layout->addLayout(firstline);
layout->addLayout(secondline);
setLayout(layout);
You are already setting the layout for your dialog through these statements...
firstline = new QHBoxLayout(this);
secondline = new QHBoxLayout(this);
So call their constructors without specifying their parent widget.
firstline = new QHBoxLayout();
secondline = new QHBoxLayout();
This would display your layout as you are expecting.