I am currently following a tutorial on how to achieve icon theme switching with QtWidgets.
Here is the article I am following:
https://openapplibrary.org/dev-tutorials/qt-icon-themes
I have a simple program setup where my MainWindow object creates a QPushButton and displays it with the dark icon.
mainwindow.h:
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QPushButton>
class MainWindow : public QMainWindow
{
// Macros
Q_OBJECT
// Constructors
public:
MainWindow(QWidget *parent = nullptr);
// Destructors
public:
~MainWindow();
// Widgets
private:
QPushButton *button;
#endif
mainwindow.cpp:
#include "mainwindow.h"
MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
{
button = new QPushButton(
QIcon(":/resources/icons/Qogir-dark/16/actions/format-text-italic.svg"),
this
);
}
MainWindow::~MainWindow()
{
}
Here is my main file.
main.cpp:
#include "mainwindow.h"
#include <QApplication>
#include <QDebug>
int main(int argc, char *argv[])
{
QApplication application(argc, argv);
MainWindow mainWindow;
mainWindow.show();
// Making sure that Qt is looking in the correct path
QStringList list;
list<<"://resources/icons";
QIcon::setThemeSearchPaths(list);
QIcon::setThemeName("Qogir");
return application.exec();
}
I found a very nice icon theme called Qogir from the Gnome website.
Link to icon theme:
(https://www.gnome-look.org/p/1296407)
resource file:
<RCC>
<qresource prefix="/">
<file>resources/icons/Qogir/24/actions/accept_signal.svg</file>
<file>resources/icons/Qogir/index.theme</file>
<file>resources/icons/Qogir-dark/16/actions/accept_signal.svg</file>
<file>resources/icons/Qogir-dark/index.theme</file>
</qresource>
</RCC>
The application runs and the button displays an icon (the dark icon). However, in my main I specified that as soon as the MainWindow is displayed, I want it to display the light theme icon. But it doesn't work.
Any ideas what I am doing wrong?
Related
I have a window. In this window I have a tab. In this tab I have two pages (page 1 & page 2). I have a pushButton on page 1. I one to go on page 2 using this pushButton. How to open other tab of same window using a pushbutton on qt?
mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow(QWidget *parent = nullptr);
~MainWindow();
private slots:
void on_pushButton_clicked();
private:
Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H
main.cpp
#include "mainwindow.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}
mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::on_pushButton_clicked()
{
}
From the comments: One solution is to add an automatic slot in your main window class that executes when the button is clicked. In this slot have it change the current index of the QTabWidget.
For example the following should cycle throw the tabs every time you click the button:
void MainWindow::on_pushButton_clicked()
{
if (ui->tabWidget->count() > 1) {
ui->tabWidget->setCurrentIndex( (ui->tabWidget->currentIndex()+1) % ui->tabWidget->count() );
}
}
I want my qwebengineview can't scroll to the left/right/up/down.
My situation is like this:
It was asked in Qt Fourm first, however I can't find a solution for this.
QT Fourm link: link
Please see the minimum code example code below. It's not the same website but can also show this problem.
I'm using Mac Os 10.15 and Qt 5.13.1.
Update
mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QWebEngineView>
QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow(QWidget *parent = nullptr);
~MainWindow();
private:
Ui::MainWindow *ui;
QWebEngineView* m_pWebView;
};
#endif // MAINWINDOW_H
mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
this->setFixedSize(920,580);
m_pWebView = new QWebEngineView(this);
// Set WebView Size
m_pWebView->setGeometry(0,0,920,580);
// Disable Right Click
m_pWebView->setContextMenuPolicy(Qt::NoContextMenu);
m_pWebView->load(QUrl("https://clash.razord.top/#/proxies"));
}
MainWindow::~MainWindow()
{
delete ui;
}
main.cpp
#include "mainwindow.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}
I have a simple application in Qt that has a QMainWindow and a QWebEngineView that loads an html page. I've set the QApplication name and the QMainWindow title.
app.setApplicationName("FooApp");
window.setWindowTitle("FooApp Window");
When I use a screen reader, it will read the main window title as:
FooApp C:/Users/tulio/Desktop/TestApp//bin/debug/test.exe
I just need it to read the application name, how can I do this?
main.cpp
#include "mainwindow.h"
#include <QApplication>
int main(int argc, char *argv[]) {
QApplication a(argc, argv);
a.setApplicationName("FooApp");
MainWindow w;
w.setWindowTitle("FooApp Window");
w.show();
return a.exec();
}
mainwindow.cpp
#include "mainwindow.h"
#include <QLayout>
#include <QApplication>
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent) {
this->layout()->addWidget(&web_view_);
this->layout()->setMargin(0);
this->resize(QSize(1000, 700));
QString path = QApplication::applicationDirPath() + "/index.html";
qDebug() << QString("HTML Path %1").arg(path);
web_view_.page()->setUrl(QUrl::fromLocalFile(path));
web_view_.resize(this->size());
channel_.registerObject("Test", &test_);
web_view_.page()->setWebChannel(&channel_);
}
MainWindow::~MainWindow() {
}
void MainWindow::resizeEvent(QResizeEvent *event) {
web_view_.resize(event->size());
}
mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QWebEngineView>
#include <QResizeEvent>
#include <QWebChannel>
#include <QDebug>
class Test : public QObject
{
Q_OBJECT
public:
explicit Test(QObject *parent=0) : QObject(parent) {}
virtual ~Test() {}
};
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow(QWidget *parent = 0);
~MainWindow();
private:
QWebEngineView web_view_;
QWebChannel channel_;
Test test_;
protected:
void resizeEvent(QResizeEvent *event);
};
#endif // MAINWINDOW_H
teste.pro
QT += core gui webengine webenginewidgets webchannel
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
TARGET = teste
TEMPLATE = app
SOURCES += main.cpp\
mainwindow.cpp
HEADERS += mainwindow.h
index.html
<!DOCTYPE html>
<html>
<body>
<h1>Hello World!</h1>
</body>
</html>
I think you need to use accessibleDescription : QString accessibleName : QString which holds the desciption that gets accessed by assistive technologies.
I'm a Qt newbie, working in Qt Creator 3.1.2 (Ubuntu Linux), Qt 5.3.1.
My program has a form with a button (pushButton) which changes the value of a text field (plainTextEdit) on being pressed. Both pushButton and plainTextEdit have been added in graphical mode. Connection between the button and its slot (on_pushButton_clicked()) has been set up via the graphical interface too.
The problem is, the program produces a bogus plainTextEdit, i.e. a different one, in the upper left corner, where the output goes to, while the "main" one stays clean. The question hence is, how I can avoid it? In general, how should I connect graphical widgets and their counterparts in the code? Here is my program:
mainwindow.h:
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QPushButton>
#include <QPlainTextEdit>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
public slots:
void on_pushButton_clicked();
private:
Ui::MainWindow *ui;
QPushButton *pushButton;
QPlainTextEdit *plainTextEdit;
};
#endif // MAINWINDOW_H
main.cpp:
#include "mainwindow.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}
mainwindow.cpp:
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
plainTextEdit = new QPlainTextEdit(this);
// whenever I remove the previous line, I get SIGSEGV
setWindowTitle(tr("My test app..."));
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::on_pushButton_clicked()
{
plainTextEdit->setPlainText("Some text here");
}
It's the widget you're creating in your constructor that is "bogus". The widgets you created in the forms editor belong to the Ui::MainWindow, you must not re-create them in your main window.
Remove this from your MainWindow:
QPushButton *pushButton;
QPlainTextEdit *plainTextEdit;
Remove the widget creation from the constructor:
plainTextEdit = new QPlainTextEdit(this);
Change your on_pushButtonClicked member to:
ui->plainTextEdit->setPlainText("Some text here");
I tried to do a bunch of research on how to solve this problem, and everything is slightly different than my situation, or didn't work to fix my problem. I will start off by explaining my main goal. I have a main window with 7 buttons on it(amongst other things), when you hit each button, it closes out the current window and opens up a new window. All the windows will have the same 7 buttons, so you can go between each window. With all windows having the exact same 7 buttons, I wanted to set up a function that each class can call to set up each button and connect to a slot() in my mainwindow.cpp(called setupSubsystemButtons in example below). The actual buttons are being placed there, but they only work when pressed from my mainwindow.cpp....when I press them from a different class nothing happens.
mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QtWidgets>
#include <QDialog>
namespace Ui {
class MainWindow;
}
class MainWindow : public QDialog
{
Q_OBJECT
public:
MainWindow(QWidget *parent = 0);
QWidget *window;
void setupSubsystemButtons(QGridLayout *layout);
~MainWindow();
private:
Ui::MainWindow *ui;
QLineEdit *tempValueBox;
QLineEdit *humidityValueBox;
QLineEdit *c02ValueBox;
...
public slots:
void ECSgeneralScreen();
void homeScreen();
};
#endif // MAINWINDOW_H
mainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "ecsgeneralcommand.h"
#include <QtWidgets>
#include <QtCore>
MainWindow::MainWindow(QWidget *parent) : QDialog(parent)
{
QGridLayout *layout = new QGridLayout;
...
setLayout(layout);
}
void MainWindow::ECSgeneralScreen()
{
ECSgeneralCommand *ECSgeneral = new ECSgeneralCommand;
this->close();
ECSgeneral->show();
//opens up the ECS screen
}
void MainWindow::homeScreen()
{
MainWindow *home = new MainWindow;
this->close();
home->show();
//opens up the home screen
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::setupSubsystemButtons(QGridLayout *layout)
{
//Push Button Layout
homeScreenButton = new QPushButton("Home");
layout->addWidget(homeScreenButton, 3, 11);
connect(homeScreenButton, SIGNAL(clicked()), this, SLOT(homeScreen()));
ECSgeneralScreenButton = new QPushButton("General");
layout->addWidget(ECSgeneralScreenButton,5,11);
connect(ECSgeneralScreenButton, SIGNAL(clicked()), this, SLOT(ECSgeneralScreen()));
}
ecsgeneralcommand.h
#ifndef ECSGENERALCOMMAND_H
#define ECSGENERALCOMMAND_H
#include <QDialog>
#include <QMainWindow>
#include <QtWidgets>
#include <QObject>
#include "mainwindow.h"
class ECSgeneralCommand : public QDialog
{
Q_OBJECT
public:
explicit ECSgeneralCommand(MainWindow *parent = 0);
private:
...
public slots:
};
#endif // ECSGENERALCOMMAND_H
ecsgeneralcommand.cpp
#include "ecsgeneralcommand.h"
#include "mainwindow.h"
#include <QtWidgets>
#include <QtCore>
ECSgeneralCommand::ECSgeneralCommand(MainWindow *parent) : QDialog(parent)
{
QGridLayout *layout = new QGridLayout;
QWidget::setFixedHeight(600);
QWidget::setFixedWidth(550);
...
MainWindow setupButtons;
//Setup Subsystem Buttons
setupButtons.setupSubsystemButtons(layout);
setLayout(layout);
};
MainWindow setupButtons;
//Setup Subsystem Buttons
setupButtons.setupSubsystemButtons(layout);
This will create the buttons and connect their signals to slots of setupButtons, which will get deleted as soon as it's out of scope (the end of the ECSgeneralCommand constructor). So your buttons will be left connected to nothing.
You need to connect the button signals to an object that will exist at the time the button is pressed, such as the ECSgeneralCommand itself. Then it could close itself and spawn the correct window.
Or, possibly a much better solution, if applicable for your application: Use a single main window, with a QStackedWidget that switches widgets when a button is pressed. That's what's typically done.