My code below brings up the icon but its like empty with nothing in it. if I move the mouse cursor over the expected icon location (last one) in system tray, its there but it doesn't show the real icon. It's more like just a place holder for the icon.
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
systemTray = new QSystemTrayIcon();
systemTray->setIcon( QIcon::fromTheme("edit-undo") ); // stock icon but I have tried use local icon file too with same result
systemTray->setVisible( true ); // extra insurance
systemTray->show();
}
What am I doing wrong? I am using Qt 5.4 and Windows 7
I don't know why the stock icon doesn't work but it was a syntax and qmake issue. I had the path given as ":/icons/file.ico" or "icons/file.ico". The correct syntax is below otherwise it will not show the actual icon. Also I had to 'run qmake' apparently needed when new icon is added to qrc because even when the syntax was right, the problem was still there.
systemTray->setIcon( QIcon(":icons/file.ico") );
Related
I'm a noob, so sorry if my question feels dumb.
I use Qt Creator to make a kind of image viewer.
I added a QListWidget and added items with a pixmap. So far, so good.
Now I try to read the hole directory and add all 438 images.
The app crashes with this message:
Cn::Process::NotifyOutOfMemory(). 17:47:36: The program has
unexpectedly finished. 17:47:36: The process was ended forcefully.
If I reduce the count to 85. The app opens, but does only show 77 images.
I tried to fix this by changing addItem to addItems but don't know how to get the QListWidgetItem in a QList or on any other way. And than it is the question of this is a solution.
Can someone give me a kick in the right direction?
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
QDir dir("C:/");
QStringList items; // String???
foreach(QFileInfo var, dir.entryInfoList ()){
if(var.isFile ()){
//items += // What to do here ??
ui->listWidget->addItem (new QListWidgetItem(QPixmap(var.absoluteFilePath ()), var.fileName ()));
}
ui->listWidget->addItems (items);
}
}
Michael
My QMainWindow contains three different windows.
I would like to display three different toolbars. One for each window.
For now I display a toolbar but I can not place it just above my windows.
I wanted to know if it was possible?
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent) {
//here I declared a widget and my three windows.
QToolBar *toolBar= addToolBar("window");
addLine=new QAction("Add Line",this);
removeLine=new QAction("Remove line",this);
removeAll=new QAction("Remove all",this);
toolBar->addAction(addLine);
toolBar->addAction(removeLine);
toolBar->addAction(removeAll);
}
I have managed to get the QSystemTrayIcon visible similar to this:
using the following line of code (with the signal slots working):
#include "dialog.h"
#include "ui_dialog.h"
#include <QMessageBox>
#include <form.h>
Dialog::Dialog(QWidget *parent)
: QDialog(parent), ui(new Ui::Dialog)
{
ui->setupUi(this);
QIcon icon("/Users/JohnnyAppleseed/IMAGE.png");
m_ptrTrayIcon = new QSystemTrayIcon(icon );
m_ptrTrayIcon->setToolTip( tr( "Bubble Message" ) );
// m_ptrTrayIcon->setContextMenu(m_trayIconMenu);
connect(m_ptrTrayIcon, SIGNAL(activated(QSystemTrayIcon::ActivationReason)),
this, SLOT(iconActivated(QSystemTrayIcon::ActivationReason)));
}
Dialog::~Dialog()
{
delete ui;
}
However, when I try to implement code to show the QWidget/QWindow near the QSystemTrayIcon that I have created, it fails to show up near it. It also shows up and disappears quickly as well (even if I didn't want it near the QSystemTrayIcon) using this code:
void Dialog::iconActivated(QSystemTrayIcon::ActivationReason reason)
{
form fr;
fr.setWindowFlags(Qt::Popup);
fr.show();
}
For the sake of being clear, I would like to show my QWidget/QWindow just like VMWare Fusion's approach (or the clock that is found on Microsoft Windows Vista or later...)
Mac OS X / Linux
Microsoft Windows
Can some one please point out what am I doing wrong? Thanks!
To make things much simpler, download the project: http://zipshare.net/sv
UPDATE #1
Regarding the QWidget/QWindow flicking issue, vahancho advised me to move the form fr; from the void Dialog::iconActivated(QSystemTrayIcon::ActivationReason reason) function to the header of the working window. And it worked successfully all thanks to vahancho. The window now shows up, but its not near the QSystemTrayIcon yet :(
The problem is that you create you form object in the stack and it gets deleted as soon as the execution goes out of you iconActivated() slot. That is why it disappears as soon as you see it. To solve the problem you need to create your pop up in the heap.
UPDATE
In order to place you dialog near the tray icon you have to determine the tray icon position. To do that you can use QSystemTrayIcon::geometry() function. You code will look like (adjust the coordinates according to your needs):
QRect rect = m_ptrTrayIcon->geometry();
fr.move(rect.x(), rect.y());
fr.show();
My foremost question is:
How do I set/change the file icon in a QFileInfo object?
If you look at my code, Qlist<QFileInfo> lists the icon of all my folders in my home directory as gnome-fs-directory. Which means, QFileInfo lists even my desktop folder's icon as plain gnome-fs-directory.
But I want Desktop to have QFileIconProvider::Desktop as icon.
Which consequently leads to the 2nd question:
Is QFileInfo the appropriate class to use to find out the icon that QFileSystemModel would use?
Which leads to the 3rd question:
Why did my QDir not pass QFileSystemModel a QFileInfo list with the appropriate icon role for Desktop?
So the ultimate question is, what do I have to do to ensure QFileSystemModel uses the appropriate icon role, when listing itself in a tree view or list view?
Code to find out the file icon of each folder in the home folder:
void MainWindow::fileIconInfo(QFileSystemModel *model)
{
QFileIconProvider *iconprov = model->iconProvider();
QFileInfoList fileInfoList = QDir::home().entryInfoList();
QFileInfoList::Iterator i;
foreach (QFileInfo fi, fileInfoList){
if (fi.fileName() == QString("Desktop"))
/*change the icon to QFileIconProvider::Desktop*/;
//the following line indicates all my icons are gnome-fs-directory!!*/
std::cout << iconprov->icon(fi).name().toStdString() << std::endl;
}
}
This is my main window:
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
fileSystemTree(ui->listView);
fileSystemTree(ui->treeView);
}
Setting the model for the view:
void MainWindow::fileSystemTree(QAbstractItemView *view) {
QFileSystemModel *model = new QFileSystemModel;
model->setRootPath(QDir::homePath());
view->setModel(model);
view->setRootIndex(model->index(QDir::homePath()));
fileIconInfo(model);
}
I think what you are describing is caused by the fact that QFileIconProvider is detecting that you use Gnome, and the is using Gtk style - no matter what. Could you try to start some other desktop environment and see if problem remains? If it does then I am right and only thing you can do is to subclass QFileSystemModel and change QIcon returned from data method - but this is quite crude and non-flexible solution.
MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow)
{
this->setupUi(this);
this->setupActions();
this->setWindowTitle(tr("CuteEdit"));
label = new QLabel(tr("No Open Files"));
this->setCentralWidget(label);
label->setAlignment(Qt::AlignCenter);
}
By above code, I get a GUI like this(Its a screenshot of whole screen, Only observe the window displayed in middle of page of ebook). (I used QT Designer)
Now, i want user to select File->Open.. A Dialog appears and file gets selected.. Its contents are to be displayed in *textEdit widget..
Function for that is below..
void MainWindow::loadFile()
{
QString filename = QFileDialog::getOpenFileName(this);
QFile file(filename);
if (file.open(QIODevice::ReadOnly|QIODevice::Text))
{
label->hide();
textEdit->setPlainText(file.readAll());
mFilePath = filename;
QMainWindow::statusBar()->showMessage(tr("File successfully loaded."), 3000);
}
}
The window crashes at line:-
textEdit->setPlainText(file.readAll());
But if i comment the line:-
this->setCentralWidget(label);
i mean i remove label as being the central widget, the program runs as expected.. Why?
And also, I am not clear about the concept of CentralWidget. Pls guide.
JimDaniel is right in his last edit. Take a look at the source code of setCentralWidget():
void QMainWindow::setCentralWidget(QWidget *widget)
{
Q_D(QMainWindow);
if (d->layout->centralWidget() && d->layout->centralWidget() != widget) {
d->layout->centralWidget()->hide();
d->layout->centralWidget()->deleteLater();
}
d->layout->setCentralWidget(widget);
}
Do you see that if your MainWindow already had centralWidget() Qt schedules this object for deletion by deleteLater()?
And centralWidget() is the root widget for all layouts and other widgets in QMainWindow. Not the widget which is centered on window. So each QMainWindow produced by master in Qt Creator already has this root widget. (Take a look at your ui_mainwindow.h as JimDaniel proposed and you will see).
And you schedule this root widget for deletion in your window constructor! Nonsense! =)
I think for you it's a good idea to start new year by reading some book on Qt. =)
Happy New Year!
Are you sure it's not label->hide() that's crashing the app? Perhaps Qt doesn't like you hiding the central widget. I use Qt but I don't mess with QMainWindow that often.
EDIT: I compiled your code. I can help you a bit. Not sure what the ultimate reason is as I don't use the form generator, but you probably shouldn't be resetting the central widget to your label, as it's also set by the designer, if you open the ui_mainwindow.h file and look in setupGui() you can see that it has a widget called centralWidget that's already set. Since you have used the designer for your GUI, I would use it all the way and put the label widget in there as well. That will likely fix your problems. Maybe someone else can be of more help...
I'm not sure I understood your problem, neither what the guys above said (which I guess are valid information) and it seems to be an old topic.
However, I think I had a problem that looks like this and solved it, so I want to contribute my solution in case it helps anyone.
I was trying to "reset" central widget using QLabels. I had three different ones, switch from first to second, then to third and failed to switch back to the first one.
This is my solution that worked:
Header file
QLabel *imageLabel;
Constructor
imageLabel = new QLabel("<img src='/folder/etc.jpg' />");
this->setCentralWidget(imageLabel);
Reset
imageLabel = NULL;
imageLabel = new QLabel("<img src='/folder/etc.jpg' />");
this->setCentralWidget(imageLabel);
Hope that helps
Aris