Pyqt stylesheet reference

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Pyqt stylesheet reference

Qt Style Sheets Reference

Qt Style Sheets support various properties, pseudo-states, and subcontrols that make it possible to customize the look of widgets. Setting the background-attachment to fixed provides a background-image that does not scroll with the viewport.

Setting the background-attachment to scrollscrolls the background-image when the scroll bars move. The spacing property specifies the spacing between the check indicator and the text.

See Customizing QCheckBox for an example. See Customizing QComboBox for an example. The dock widget border can be styled using the border property. The ::title subcontrol can be used to customize the title bar. The close and float buttons are positioned with respect to the ::title subcontrol using the ::close-button and ::float-button respectively.

When the title bar is vertical, the :vertical pseudo class is set. In addition, depending on QDockWidget::DockWidgetFeaturethe :closable:floatable and :movable pseudo states are set. Warning: The style sheet has no effect when the QDockWidget is undocked as Qt uses native top level windows when undocked. See Customizing QDockWidget for an example. Since 4. In the case of a checkable QGroupBoxthe title includes the check indicator.

The indicator is styled using the the ::indicator subcontrol. The spacing property can be used to control the spacing between the text and indicator. See Customizing QGroupBox for an example. Sort indicator in can be styled using the ::up-arrow and the ::down-arrow Sub-control. See Customizing QHeaderView for an example.Qt, and by extension, PyQt and PySide, offers the ability to style widgets based on properties of that widget.

This is really handy if you want to store attributes on the widget but it is incredibly useful when you want to use it to toggle stylesheet styles on an object as the rest of my post will hopefully demonstrate. Stylesheets are the Qt equivalent to CSS on the web.

But the really cool thing is that stylesheets can be coupled with dynamic properties to do state based styles. So for example I want to only have the above when a Test property is True. You might be wondering why true is lowercase. How about if I only want it to affect a button with an object name StyledButton and only when the state is True?

So it can be really useful for defining all your styles in one place and then simply updating the property later and calling an update function. This is very easy and there are two ways you can do this:. You can run this code. It will generate a QDialog with two buttons. Twitter RSS. An example of this to make a button with a red font color and black background:.

Option 1 myWidget. Putting It All Together You can run this code. Hope you find that useful! Search for:. Pin It on Pinterest.A QCheckBox is an option button that can be switched on checked or off unchecked.

Checkboxes are typically used to represent features in an application that can be enabled or disabled without affecting others, but different types of behavior can be implemented. For example, a QButtonGroup can be used to group check buttons logically, allowing exclusive checkboxes. However, QButtonGroup does not provide any visual representation.

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The image below further illustrates the differences between exclusive and non-exclusive checkboxes. Whenever a checkbox is checked or cleared it emits the signal stateChanged.

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Connect to this signal if you want to trigger an action each time the checkbox changes state. You can use isChecked to query whether or not a checkbox is checked. In addition to the usual checked and unchecked states, QCheckBox optionally provides a third state to indicate "no change".

This is useful whenever you need to give the user the option of neither checking nor unchecking a checkbox. If you need this third state, enable it with setTristateand use checkState to query the current toggle state. Just like QPushButtona checkbox displays text, and optionally a small icon. The icon is set with setIcon. The text can be set in the constructor or with setText.

pyqt stylesheet reference

A shortcut key can be specified by preceding the preferred character with an ampersand. For example:. Important inherited functions: textsetTexttextpixmapsetPixmapaccelsetAccelisToggleButtonsetDownisDownisOncheckStateautoRepeatisExclusiveTogglegroupsetAutoRepeattogglepressedreleasedclickedtoggledcheckStateand stateChanged.

Returns the check box's check state. If you do not need tristate support, you can also use QAbstractButton. See also setCheckState and Qt. Reimplemented from QAbstractButton. Initializes option with the values from this QCheckBox. This method is useful for subclasses that require a QStyleOptionButtonbut do not want to fill in all the information themselves. Sets the check box's check state to state. See also checkState and Qt.

This signal is emitted whenever the check box's state changes, i. A checkbox shown in the Macintosh widget style. A checkbox shown in the Windows XP widget style. A checkbox shown in the Plastique widget style. Method Documentation QCheckBox.Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you may not be able to execute some actions.

Please download a browser that supports JavaScript, or enable it if it's disabled i. I am trying to change the background color of a QMenuBar Item when it is hovered. I tried this stylesheet:. However the color never get blue when I'm hovering, i'm wondering if it's possible to achieve what I want with Qt? Another question, why is it impossible to add a QMenu from designer, i'd prefer all my UI code to stay in designer ui file.

Thank you. Hi SGaist, i'm currently testing on Windows 8. Is this function available? I see plenty of Qt app that have hover effect in their menu. You should however consider opening a report about that, at least to let the developers known there's something fishy going on with Windows 8.

That change was made in the last code example posted by maximus, presumably after he switched operating systems, so naturally it works. It's true I changed the stylesheet from "item:hover" to "item:selected", I thought it was the OS. I'll make sure to use "item:selected" instead of "item:hover" for item stylesheet so it works on all OS. You could very well have your cursor going over the menubar entries without having clicked on them, that would be hovering, wouldn't it?

I use item::selected and when I hover it, it change according to ::selected stylesheet Don't know why they are two stylesheet name for it, i'm just happy as long at it works :.

When it comes to menu bars we have to use :selected. It does seem strange, but perhaps this is because the standard behavior, at least on Windows, is the color doesn't change between a hover and a click, so a separate setting for a hover is superfluous. Just a guess on my part. The fact the Qt developers made this choice makes me think this is common. However, if there's indeed a difference of handling between menubar and contextual QMenu, that should be mentioned in the documentation.

Qt Forum. Only users with topic management privileges can see it. Reply Quote 0 1 Reply Last reply. Hi, Depending on your OS i. OS X the style might not be applied. Looks good to me, did you try with the pressed state?

Anyway this code is for windows only, I gave up on it for now. I wonder if this is a limitation of the style sheet or a bug on windowsQt Style Sheets Reference. Let's start by setting yellow as the background color of all QLineEdit s in an application.

This could be achieved like this:. If we want the property to apply only to the QLineEdit s that are children or grandchildren or grand-grandchildren of a specific dialog, we would rather do this:. Alternatively, we can set the background-color property directly on the QLineEditomitting the selector:. There are many situations where we need to present a form that has mandatory fields. To indicate to the user that the field is mandatory, one effective albeit esthetically dubious solution is to use yellow as the background color for those fields.

It turns out this is very easy to implement using Qt Style Sheets. First, we would use the following application-wide style sheet:. This means that every widget whose mandatoryField Qt property is set to true would have a yellow background.

Then, for each mandatory field widget, we would simply create a mandatoryField property on the fly and set it to true. For example:.

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This time, we will show how to create a red QPushButton. This QPushButton would presumably be connected to a very destructive piece of code.

Things look already a lot better. But the button looks a bit cramped. Let's specify some spacing between the border and the text using the padding. Additionally, we will enforce a minimum width, round the corners, and specify a larger font to make the button look nicer:. The only issue remaining is that the button doesn't react when we press it. We can fix this by specifying a slightly different background color and use a different border style.

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Subcontrols give access to the sub-elements of a widget. Let's customize the menu indicator for the red push button:.

pyqt stylesheet reference

By default, the menu indicator is located at the bottom-right corner of the padding rectangle. We can change this by specifying subcontrol-position and subcontrol-origin to anchor the indicator differently. We can also use top and left to move the indicator by a few pixels. This positions the myindicator. Since red seems to be our favorite color, let's make the text in QLineEdit red by setting the following application-wide stylesheet:.

However, we would like to give a visual indication that a QLineEdit is read-only by making it appear gray:. At some point, our design team comes with the requirement that all QLineEdit s in the registration form with the object name registrationDialog to be brown:. For example, to set a background-image that scrolls with the scroll bar:.

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The main difference is that a tristate QCheckBox has an indeterminate state. We will look at an example where the drop down button of a QComboBox appears "merged" with the combo box frame. The title bar and the buttons of a QDockWidget can be customized as follows:. If one desires to move the dock widget buttons to the left, the following style sheet can be used:. Let us look at an example that moves the QGroupBox 's title to the center.

To create a line edit with rounded corners, we can set:. The password character of line edits that have QLineEdit::Password echo mode can be set using:. To provide a special background when you hover over items, we can use the ::item subcontrol.Qt Style Sheets support various properties, pseudo-states, and subcontrols that make it possible to customize the look of widgets.

Setting the background-attachment to fixed provides a background-image that does not scroll with the viewport. Setting the background-attachment to scrollscrolls the background-image when the scroll bars move. The spacing property specifies the spacing between the check indicator and the text.

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See Customizing QCheckBox for an example. See Customizing QComboBox for an example. The dock widget border can be styled using the border property. The ::title subcontrol can be used to customize the title bar. The close and float buttons are positioned with respect to the ::title subcontrol using the ::close-button and ::float-button respectively.

When the title bar is vertical, the :vertical pseudo class is set. In addition, depending on QDockWidget::DockWidgetFeaturethe :closable:floatable and :movable pseudo states are set. Warning: The style sheet has no effect when the QDockWidget is undocked as Qt uses native top level windows when undocked.

See Customizing QDockWidget for an example. Since 4. See Customizing QFrame for an example. In the case of a checkable QGroupBoxthe title includes the check indicator. The indicator is styled using the the ::indicator subcontrol. The spacing property can be used to control the spacing between the text and indicator. See Customizing QGroupBox for an example.

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Sort indicator in can be styled using the ::up-arrow and the ::down-arrow Sub-control. See Customizing QHeaderView for an example. The color and background of the selected item is styled using selection-color and selection-background-color respectively. The password character can be styled using the lineedit-password-character property. See Customizing QLineEdit for an example.

The selection behavior is controlled by the show-decoration-selected property. Use the ::item subcontrol for more fine grained control over the items in the QListView. See QAbsractScrollArea to style scrollable backgrounds. See Customzing QListView for an example. See Customizing QMainWindow for an example. Individual items are styled using the ::item subcontrol. In addition to the usually supported pseudo states, item subcontrol supports the :selected:default:exclusive and the non-exclusive pseudo states.

pyqt stylesheet reference

The indicator of checkable menu items is styled using the ::indicator subcontrol. For items with a sub menu, the arrow marks are styled using the right-arrow and left-arrow. See Customizing QMenu for an example. In this case, the style sheet will have no effect.

See Customizing QMenuBar for an example. If the progress bar displays text, use the text-align property to position the text. Indeterminate progress bars have the :indeterminate pseudo state set.

See Customizing QProgressBar for an example.Stylesheets add spicy flavor to your boring Qt GUIs. Inspired by the web, stylesheets are a great way to stylize your Qt GUI, but it seems that few people use them. This tutorial assumes that you can get around in Qt Designer, and that you understand a little about Qt layouts.

Step 2 Add a QFrame to your form, and apply a vertical layout to your form any layout will work actually: vertical, horizontal or grid. Give your form about 30 pixels of layout margin around its perimeter. This is where we specify the style sheet for our form. Since stylesheets cascade down to the child widgets, you can stylize any widget in your form from this point.

Or you may have mistyped something into the CSS dialog. One cool feature is that you get to preview the style changes right as you make them. Let me explain what we just did. In our example, MyLoginForm identifies the parent widget i. All we did there is give it a gray background with background: gray. For mainFramewe gave it a thick gray border, a white background, and rounded corners.

Then give your layout some margin. I used 50 pixels of margin and 15 pixels for both vertical and horizontal spacing. Add this to the style sheet for MyLoginForm:. For example, you can change the border style of just a single side of a QFrame. This would be immensely useful. The dialog we just designed will look exactly the same on Linux, Windows, and Mac OS X because we stylized it so aggressively. If you want your widgets to look native on each platform, you should generally use style sheets sparingly, but if your goal is to have a consistent look across all platforms, style sheets are your best friend.

Now that I have discovered the power of style sheets in Qt, I use them whenever possible. What cool things have you done with Qt style sheets? Great tip, I was going nuts trying to figure out how to set a background image on a QDialog that did not affect all the child widgets. This did the trick and inspired further tinkering. Thanks for this really helped alot. I am trying to use see if I can use methods that are available to both types.

Your patch to import css files into designer sounds great! How can we partition the Qt powers to incorporate your patch into a future Qt release? Cheyanne, did you add kinect. Nevertheless, I have spent hours to figure out why the mainfraime allways stay in white with no border.

pyqt stylesheet reference

But at runtime the frame is rounded and white, no border. Mouha: Does your mainFrame have rounded corners, or is it just a solid white rectangle with no border, shape or color? Also, are you compiling your stylesheet using a. That would explain why you have to recompile your application to get it to take effect. If I want to apply a style to a specified checkbox using its name, does not work. Do you have any idea? It works if the object name is set in code.

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Is there any way to remove the style sheet after it has been set? Just came across the page when I was looking for QT style-sheets.

Extremely well organized and nice explanation.


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