I am writing code that allows a user to build a theme for the application, so they need to be able to effectively communicate that they want to change something about some element of JavaFX.
Suppose I have a bar on the top of every view that lets a user change the way some set of things look: button, label, text, and so on.
Here is a basic stylesheet that I am working with. It just puts style on root and button.
basetheme.css
.root {
-fx-background-color: "teal";
}
Button {
-fx-background-color: "orange";
-fx-font-size: 2em;
-fx-text-fill: #0000ff
}
Right now, all the views I have would load this sheet each time they are loaded:
view.getStylesheets().add("views/basetheme.css");
The Button class and its fx properties here would apply to all buttons in the view.
This is the behavior I want. I want the user to have leverage over Button and its properties during runtime.
For instance, if they want to change Button's -fx-font-size property from -fx-font-size: 2em to -fx-font-size: 3em, they can do that. Is this possible?
Currently, I know setStyle will set properties on some elements, but I am looking for a way to do this for not just a single Button, Label, and so on, but for all them. I want there to be run-time changes. For instance, after a user changes some element like button and one of its properties, it reloads that view and the change is applied.
I want to do something like view.setStyle("Button: some properties") and then it add those properties to Button class or overrides it, instead of view.setStyle("some properties") adding properties to root. The latter would not recognize that the property goes on a button, let alone all Buttons in view.
The obvious reason why this might not work this way is that we are not really changing the css file when we do those inline setStyle calls, just setting over the existing property and thus that inline has higher precedence and is updated.
I know I could technically do somebutton.setStyle("some properties"), but I want the user to be able to modify properties for all Button elements by specifying it at the root of a view so the styles trickle down to subelements in the view. This makes things easier.
You could use CSSFx to constantly pull in a CSS file that has bee written by your app.
Related
I want user to select a theme which he wants to apply to the document.
So i have created a popup dialog which has multiple themes which are qradiobutton. But I want to display only icons and remove circle from the widget.
I have tried visible:hidden for the radio button but that didn't worked.
If you want to customize QRadioButton with style-sheets I suggest you check the reference documentation: https://doc.qt.io/qt-5/stylesheet-reference.html#qradiobutton-widget
You should also find useful the examples given in Qt documentation as it shows how to replace the check indicator by different images:
QRadioButton::indicator {
width: 13px;
height: 13px;
}
QRadioButton::indicator::unchecked {
image: url(:/images/radiobutton_unchecked.png);
}
QRadioButton::indicator:unchecked:hover {
image: url(:/images/radiobutton_unchecked_hover.png);
}
https://doc.qt.io/qt-5/stylesheet-examples.html#customizing-qradiobutton
If you do this yo can just use the indicator to display the icon and leave the QRadioButton label empty.
However, I have to warn you, depending on which QStyle you are using, it could happen that using style-sheets destroys completely the style of a component. A general example is: you are using a style where buttons have round corners, you use style-sheets to change the font of the button and as a result the button does not have round corners anymore. This is caused by incompatibilities between some QStyle and the style-sheet mechanism. If you do not want to make a multi platform app, it might not be an issue as you will use only one style, but if you make an multi platform app, you have to check every possible style you platform can have on the different platforms.
So if you want to have a QRadioButton without indicator and not use style-sheets, you can do it in C++ directly by subclassing QAbstractButton. Just make sure you set your class to be autoExclusive so that is will behave like a radio button.
would you try this? ( visible => visibility )
input[type="radio"] {
visibility: hidden;
}
or
input[type="radio"] {
display: none;
}
I have a JavaFX button that has been set as Default Button so the user can select it with the Enter key. Currently, it has a blue background:
But I'd like to make it look like a normal button:
I took a look at the JavaFX CSS Guide and it looks like there's only one feature to override (-fx-base).
But changing this feature has unpredictable effects—sometimes it eliminates the button's gradient; sometimes it makes the button transparent.
Is there a simple way to just get rid of the Default Button styling?
My guess is that you are looking in the wrong style sheet. The old default style sheet caspian.css was replaced with modena.css. So setting default value for -fx-base from modena.css should fix the issue:
.button:default {
-fx-base: #ececec;
}
I'm a new user of GWT and I'm looking for some advice concerning "theme management".
I have to make a website that can handle theme changes. What I mean is that a user can make is own theme by filling a form, then the website will automatically and dynamically changes its color to display the new ones.
I thought using a CSS sheet for all the static properties and using some GWT lines (e.g. label.getElement.getStyle.setColor(...)) to change color. But I have many "hover" properties and I think creating many MouseOverHandler is not a good idea ...
Is there a way to edit CSS sheet dynamically or a magic trick to do that ?
Thanks.
You have many options - the most straight forward (to me) is to make use of the existing CSS classes that GWT introduces. If you look at javadocs for any of the widgets GWT provides, you'll notice the CSS Style Rules section. For example, Button:
.gwt-Button
the outer element
That means that every Button you add to the page has a .gwt-Button style applied to it. If you inject a CSS stylesheet with a rule that overrides this style:
.gwtButton {
background: red;
}
All your buttons will turn red. You can inject stylesheets using StyleInjector. Creating the stylesheet's content dynamically is up to you - but it's just text, it shouldn't be hard (but make sure the generated CSS rules are valid!).
To get you started, try hooking up this code to some button and see if clicking it triggers changing all the Buttons on the page red:
StyleInjector.inject(".gwt-Button { background: red; }");
If you have custom widgets that you want styled differently, just add an individual class to them (.customWidgetWhatever, like Button has .gwt-Button, etc.) that you will include in your custom stylesheet.
Make sure you understand how CSS works and what it can do for you. For example, if you want to style each button the same, you don't have to change each button's style individually, just use:
button {
background: green;
}
And all the <button>s will turn green.
The easiest way to change themes without reloading the whole application is to assign a theme class to the body element.
You'd want to prepend each CSS class in your app with a particular theme, e.g.:
.theme1 .myClass {
color: red;
}
.theme2 .myClass {
color: blue;
}
Then you'll apply a particular theme to the body element:
<body class="theme1">
When you want to change themes, you'll have to change the body class so it will become:
<body class="theme2">
this way, each element that has class myClass will have its color changed from red to blue.
You cannot edit a CSS file dynamically, but you can inject CSS style either as a new CSS file, or directly into your document.
For example, you can define all key CSS rules in your "main.css" file, and add your user-defined rules directly into the host HTML page with a style tag.
I have an ExtJS form that uses hbox-layout containers to create sentences that contain form inputs and there is a requirement to disable the form under certain conditions. The hbox-layout containers have a series of radio, text, checkbox, and textfield components. You can see an example on jsfiddle.
This is an answered question here on SO that doesn't fully work for me because if you disable something that isn't a field (like the text component I'm using) the disable style is different - it appears to mask the component instead of just graying out the text. When nested components are disabled, the mask gradients stack. Examples of this scenario are illustrated on this jsfiddle.
Is there a way to override how text handles its styling when it becomes disabled? I think that may be the easiest solution.
You'll have to handpick each style fix, but yes that's completely possible. Just addCls to give a hook for your CSS...
For example, using the following CSS:
.my-disabled-ct text {
opacity: .3;
}
You can give a similar disabled look both to fields and text items with the following code:
var rootCt = Ext.getCmp('lotsOfItems');
rootCt.query('field').forEach(function(field) {
field.disable();
});
rootCt.query('container').forEach(function(ct) {
ct.addCls('my-disabled-ct');
});
You should probably avoid using disable on field since Ext put a mask over them then (though you could probably hide it with CSS).
You could add the class and target the CSS directly to text items however, why not? In this case, you would query for 'text' and use addCls on them, with this kind of CSS:
text.my-disabled-cls {opacity: .3;}
That goes without saying that you'll restore your components look to "not disabled" by removing the CSS class with the same query and the removeCls method.
I'm writing a ServerControl in ASP.NET 3.5, and I'm exposing CssClass, so the user can manipulate the visual appearance of the control. My problem is that I want to establish reasonable defaults, so that the user doesn't have to configure CSS unless he wants to change the defaults.
My specific problem is that my control is emitting html divs, that need to display background images. I want the user to be able to specify a different image in CSS, but I want to display a default background image, and I can't make that work.
The entire server control is emitted as a div, with a class name set to the value the user provided in CssClass. The div that needs the background image is enclosed within this outer div, with a class name of its own. I am currently setting the background image in CSS on the page that contains the control:
<style type="text/css">
.cssClass .innerDiv {
background-image: url("http://....");
}
</style>
With this the proper image is drawn. But if it's not there, no image is drawn.
What I want is for the ServerControl to emit some CSS that will define these image urls, that would be over-ridden by any css that was added by the user, and for that default CSS to include URLs to images embedded in the ServerControl's assembly.
And I'm not sure of how to do either. Nor, for that matter, am I sure this is the best approach.
Any ideas?
Expose various properties with CSS classes, such as HeaderCssClass, ItemCssClass, if you need more than one style.
Also, you can do a check that if the user has a CSS class name specified, you use that; otherwise, use your default and omit the custom CSS from the control.
In your rendering logic, you can render the right CSS class name as the attribute of the DIV depending on whether the user has specified anything. So you can do:
if (this.HeaderCssClass != null)
writer.AddAttribute("class", this.HeaderCssClass);
else
writer.AddAttribute("class", "standard");
writer.RenderBeginTag("div");
And only write out your standard CSS if the HeaderCssClass is null.