When I run program from Qt Creator icon is visible in tray, but when I run compiled program from "relased" folder I see process of application but no icon in tray
QSystemTrayIcon * tray = new QSystemTrayIcon( QIcon( "ok.png" ), this );
tray->setContextMenu( trayIconMenu );
tray->show();
tray->setVisible( true );
It looks like your image file ok.png was not deployed properly.
I would avoid the recommendation of using an absolute path.
Please introduce yourself with the Qt-ressource-system: it adds a layer ob indirection to manage ressources like graphics, sound files, .. and Qt will take care of proper deployment: https://doc.qt.io/qt-5/resources.html
Related
When I create the "Command link button" (QCommandLinkButton) it has relatively nice green arrow icon.
I would like to see what other nice icons can I choose. When I try to change the icon, [Theme] appears instead of path or some GUI selection dialog:
I also noticed the context menu:
When I click Set icon from theme, again expecting some GUI selection list, I get just a text field:
What I was imagining:
Where's the list of icons from which the green arrow was taken?
QIcon::fromTheme works under specific conditions.
If it can find it in the QIcon::themeSearchPaths() for the QIcon::themeName()
If the desired icon isn't there, Qt Designer won't be able to do any of the from theme, named icons.
But... if you check your target system for the theme search paths and set the theme name, you are more likely to have success.
Example
On linux, I wanted to get a plus and a minus icon.
I found list-add.png and list-remove.png fit the bill.
https://github.com/GNOME/adwaita-icon-theme/tree/master/Adwaita/16x16/actions
http://standards.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html
http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html
I did a locate on my system and found these:
/usr/share/icons/gnome/16x16/actions/list-add.png
...
/usr/share/icons/gnome/32x32/actions/list-add.png
/usr/share/icons/gnome/scalable/actions/list-add.svg
/usr/share/icons/oxygen/16x16/actions/list-add.png
...
Forcing with fallback icon in QIcon::fromTheme
Find the icon on the filesystem:
ui->toolButton->setIcon(QIcon::fromTheme("list-add",
QIcon("/usr/share/icons/gnome/16x16/actions/list-add.png")));
Find the icon in the qt resource system...
Add the icon in a qrc file in your build, then reference it's path.
ui->toolButton->setIcon(QIcon::fromTheme("list-add",
QIcon(":/list-add.png")));
Overriding the current icon theme
qDebug() << "themeSearchPaths:" << QIcon::themeSearchPaths() << QIcon::themeName();
// themeSearchPaths: ("/usr/local/share/icons", "/usr/share/icons", ":/icons") "hicolor"
The default theme for the system, and for the target deployment machine, likely didn't have the icons in it I wanted... but the gnome or oxygen icon desktop theme installed would almost always have it...
QIcon::setThemeName("oxygen");
Note that you won't see the preview in Qt Designer necessarily because it doesn't set the theme until runtime of your code.
The gnome icon library has 1100+ icons in it. Here is one list:
https://gist.github.com/peteristhegreat/c0ca6e1a57e5d4b9cd0bb1d7b3be1d6a
This works as long as you know what themes are available on the target system.
The list from freedesktop.org has 286 icons listed.
Use icons included in Qt
Just like #peppe pointed out, Qt includes 70 standard icons, too.
widget->setIcon(widget->style()->standardIcon(QStyle::SP_BrowserReload));
http://doc.qt.io/qt-5/qstyle.html#StandardPixmap-enum
Conclusion
Using a stock library on your target system is probably the fastest. Using the Qt built-ins is fast to figure out and use, but is fairly limited. Using a resource file is probably the most robust method, and gives unlimited options on what icon to use.
Be sure to pick a standard icon pack, and think about licensing and attributions, and some other things like that.
And there is no shortage of icons available online:
https://www.quora.com/What-is-the-best-icon-library
https://www.google.com/search?q=open+source+icon+library
Hope that helps.
I don't think that's the function you want to use. The "theme" name there corresponds to the QIcon::fromTheme functionality, which uses icons named according to the FDO specification
http://standards.freedesktop.org/icon-theme-spec/icon-theme-spec-latest.html
http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html
And they're not really supported on non-FDO platforms (Windows, Mac, ...) unless you deploy your own theme files.
Now some stock icons are shipped with Qt itself; I don't know how to set them from Designer, but from code you can use QStyle::standardIcon:
widget->setIcon(widget->style()->standardIcon(QStyle::SP_BrowserReload));
If the icon you need is not provided by Qt, you'll need to ship it. In that case the Resource System is a convenient way to bundle it alongside your executable.
Last, but not least, from a UX point of view you should consider using QToolButtons unless you're really building a Vista-like wizard.
im developing QT application, and im using few icons
this is my resource.qrc file
<RCC>
<qresource prefix="/new/prefix1">
<file>army-officer-icon.png</file>
<file>uac.png</file>
</qresource>
</RCC>
then i ofcourse include it in my .pro file
RESOURCES += \
resource.qrc
and here is the code which takes care of icons:
//this code is part of the mainwindow.cpp
QSystemTrayIcon *trayIcon;
trayIcon = new QSystemTrayIcon(this);
trayIcon->setContextMenu(trayIconMenu);
trayIcon->setIcon(QIcon(":/new/prefix1/army-officer-icon.png"));
trayIcon->show();
//this code is part of the ui_mainwindow.h (generated by QT)
QLabel *label_5;
label_5 = new QLabel(centralWidget);
label_5->setObjectName(QString::fromUtf8("label_5"));
label_5->setGeometry(QRect(40, 302, 46, 21));
label_5->setPixmap(QPixmap(QString::fromUtf8(":/new/prefix1/uac.png")));
label_5->show();
So, this looks reasonable, right ?
===windows 7, developing station, QT installed
also the result effect is as i expected
i can see both icons :: tray icon & uac shield = awesome
but when i move to the other workstation, somethings strange happens
===windows XP, user work station, QT NOT installed
as u can see, the trayicon still has its own icon, but the "uac shield icon" dissapears... its very disturbing, and i really dont get it since both icons are *.png formats, i browsed a lot, and maybe it has connection with qt image plugins (althought i think that i should care about it only when my icon are *.jpeg, *.gif format), but wasnt able to make this solution works...
so any ideas are welcomed.
Thanx in advance.
Okay, ive found the solution just after ive posted this (actually , i was quite close, but i copied something with wrong path :/)
locate C:\QtSDK\Desktop\Qt\4.8.0\mingw\plugins
copy plugins/imageformats to your application folder
open main.cpp and add this line of codes
a.addLibraryPath(QCoreApplication::applicationDirPath ()+"/plugins");
compile, and have a look at your beautiful icons :)
I am developing an Adobe Air app. I need to set an icon to the app so it is shown on the task bar. I added the icon tag to the descriptor file but it is not working and I really don't know why, any ideas?
Two things that might be throwing you off:
1) the icons block is commented out by default in the auto-generated descriptor file, and is an easy thing to overlook
2) the icons specified in a descriptor file don't appear in the app unless you build a release build, and install the resulting .air file. A debug build will only show the AIR icon.
At least these are the behaviors I experience in Flash Builder 4.
Adding the icons to your application descriptor should do it.
However, icons come in different sizes.
For example:
<icon>
<image16x16>/icons/app/icon_16.png</image16x16>
<image29x29>/icons/app/icon_29.png</image29x29>
<image32x32>/icons/app/icon_32.png</image32x32>
<image36x36>/icons/app/icon_36.png</image36x36>
<image48x48>/icons/app/icon_48.png</image48x48>
<image57x57>/icons/app/icon_57.png</image57x57>
<image72x72>/icons/app/icon_72.png</image72x72>
<image114x114>/icons/app/icon_114.png</image114x114>
<image128x128>/icons/app/icon_128.png</image128x128>
<image512x512>/icons/app/icon_512.png</image512x512>
</icon>
If I'm not mistaken, the 32x32 icon should be the one that is displayed in the taskbar.
Obviously, make sure that you are referring to the correct path in your descriptor file.
One more thing. I just wasted over an hour on this: For an iOS app, you won't see the icon when you drop the app into iTunes (at least not under Windows), but it will appear on your device!
I am building an mobile flex app in eclipse indigo and have my app worked almost to completion and about ready for deployment. Unfortunately, I cannot find how to change the app icon and title for the system to read, so my app still shows up as Main with the default package symbol in the launcher. Does anyone know where to apply changes to these properties?
There are properties in your app-config file. If you main application file is Main.mxml; then most likely your app config is named Main-app.xml. Look for the icon tag to specify the app icon. One of my apps uses something like this:
<icon>
<image32x32>/assets/icon/Icon32x32.png</image32x32>
<image36x36>/assets/icon/Icon36x36.png</image36x36>
<image48x48>/assets/icon/Icon48x48.png</image48x48>
<image72x72>/assets/icon/Icon72x72.png</image72x72>
<image114x114>/assets/icon/Icon114x114.png</image114x114>
</icon>
I believe the name under the icon is specified using the name parameter in the same file:
<name>My App Name</name>
In my last question (Qt/C++: Icons not showing up when program is run) I asked how to get an icon to show up on a toolbar and was told I needed a Qt Resource, which I added and that fixed my problem, the icon did show up on the toolbar.
Now I'm trying to set the title icon of a window, using the same resource file, and it shows up fine in the Qt preview viewer but blank in the actual program. I am using a MainWindow which has an MDIArea and the children are MainWindows as well; neither the parent MDI nor child MDI windows icons will show properly. On the parent, I see the regular "Windows Application icon" and on the child, the icon is completely blank.
How can I solve this?
You will have to go through a standard resource file for windows. (That is, a .rc)
The process (as described in the documentation) is:
Store the ICO file in your application's source code directory, for
example, with the name myappico.ico. Then, create a text file called,
say, myapp.rc in which you put a single line of text:
IDI_ICON1 ICON DISCARDABLE "myappico.ico"
Finally, assuming you are using qmake to generate your makefiles, add this line to your myapp.pro
file: RC_FILE = myapp.rc
Regenerate your makefile and your application. The .exe file will now be represented with your icon in Explorer.
In the Visual Studio case you're simply able to add a resource to your project.