I have a pratical problem where there is an arrow image which is either enabled or disabled, I toggled between two different images for both the cases. When the arrow is active i set a pseudoclass that changes the image to a blue one and when it is disabled, the image is grey
css snippet that does it :
#navigateLeftImage:enabled
{
-fx-image:url("images/left-arrow.png");
}
I enable the state of the pseudoclass upon some condition.
Now, one more thing that is needed is when i hover upon the enabled image, it should scale up that can be achieved by css selector :hover, but i only want it to scale up when its image is the enabled one.
If i could nest pseudoclass inside a pseudoclass, I would do something like this
#navigateLeftImage:enabled
{
-fx-image:url("images/left-arrow.png");
#navigateLeftImage:hover
{
//css to scale
}
}
I know that i can add a handler to hover and then remove it when the image is the disabled one, but I would resort to it in the end.
CSS does not allow you to put a rule inside another rule. You could use multiple rules though and select use a selector that only applies, if both pseudoclasses are present:
#navigateLeftImage:enabled
{
-fx-image: url("images/left-arrow.png");
}
#navigateLeftImage:hover:enabled
{
//css to scale
}
Related
When dragging an event on the calendar there's a light blue-ish color that appears, I think it's .fc-highlight class that determines the color but trying to override it with css doesn't seem to work, neither does there appear to be any draggable callbacks I can use to change it
The CSS property is set in the fullCalendar CSS file using background, rather than background-color so you need to use that to override it:
.fc-highlight
{
background: red;
}
See demo at: http://jsfiddle.net/sbxpv25p/948/
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'm new to the web side of things, and am confused how to deal with CSS. (Thankfully), there is little direct manipulation of HTML/CSS when using ExtJS4 so far... so now that I'm in need to change the CSS, I'm having problems.
Specifically, I'm trying to dynamically change the color of accordion header backgrounds.
Javascript:
afterrender: function(subForm) {
subForm.getHeader().getEl().addCls('custom-accordion-hd-valid');
// this works - so I know it's the right element.
subForm.getHeader().getEl().setStyle('background', 'hsl(100, 60%, 60%)');
}
CSS:
// attempt 1
.custom-accordion-hd-valid {
background: green;
}
// attempt 2
.custom-accordion-hd-valid .x-accordion-hd {
background: green;
}
So:
setting style via setStyle does work, but it doesn't easily allow me to remove a style
setting via addCls with CSS attempt 1 loads the CSS, but it gets overridden by .x-accordion-item
setting via addCls with CSS attempt 2 fails to load the CSS
Help?
if you for instance wanted to remove the background style you set here:
subForm.getHeader().getEl().setStyle('background', 'hsl(100, 60%, 60%)');
css will allow you to simply override it by setting it again eg:
subForm.getHeader().getEl().setStyle('background', 'none');
or
subForm.getHeader().getEl().setStyle('background', 'blue');
css has a particular priority on how it judges which styles are most "important" when multiple styles are provided - take a look here at this great article on css specificity
and realize by using that setStyle() method you are applying "inline" styles to these elements, where as other css definitions either in a file or in a style html tag have a lower priority
I'm doing an image button rollover that has 3 stages (normal, hover, active).
I have the normal and hover stages working, however I can't seem to get the 'active' to work. That is, I want the image to stay on the active lever after it has been clicked.
Here is what I have:
http://jsfiddle.net/pufamuf/Q3YpU/1/
Thanks! :))
What you're trying to do will require JavaScript. Your CSS is fine, but when the link is no longer active, the :active selector no longer applies, and there's not much you can do about that.
You could (for example) use JavaScript to respond to the click event by adding an extra CSS class to the tag, and use that class to style the link identically to your :active link. For example, if your JS adds the class "clicked", your rule might look like
#emailUs:active, #emailUs.clicked
{
background-position: 0 -62px;
}
Many (most?) developers would probably use jQuery for something like this.
The :active pseudo-class only applies while the element is in the process of becoming activated. Once the mouse click is released the element no longer falls under the :active category.
In order to produce your expected behavior you will need to use some Javascript.
Use jQuery addClass on click event
If you could use JavaScript, this would be simple. Come up with some class name (e.g., active), and add it to your :active declaration:
#emailUs:active, .active
{
background-position: 0 -62px;
}
Then use JavaScript to listen for the click event on that link, prevent the default action, and add/remove the active class from the element as necessary.
However, if JavaScript isn't allowed, there's a much messier way to get what you want, which probably won't be feasible on a live site.
Change the link's href so that it points to itself:
<a id="emailUs" href="#emailUs" title="Email Us"></a>
Then use the :target selector in your CSS:
#emailUs:active, #emailUs:target
{
background-position: 0 -62px;
}
Keep in mind that the second solution has some caveats that go with it:
It tries to reposition the page so that the link is at the top of the screen
There could be a bunch of issues if you're already using the fragment identifier on your site
It won't work at all in IE6-8
I'm new to Dojo and CSS, so maybe I'm missing something obvious here.
I have a page with several Dijit buttons that are created programmatically, and I want to make one of them bigger- leave the text alone and increase the space between the text and the edge of the button. I don't want to override the CSS for .dijiButtonNode to do so because there are other Dijit buttons the page that shouldn't be altered.
I tried adding this to the widget declaration:
style: { padding: "1em" }
and this:
class: "PaddedButton"
.PaddedButton
{
padding: 1em;
}
but since Dijit buttons are rendered as nested spans it padded the area around the button instead.
The best way to work with CSS is using one of the browser debugging tools (that you should already be using) like Firebug or the Chrome developer tools. You can find an element's DOM node easily with inspect_element and then directly edit its CSS styles until they do what you want. You can also see what CSS rules are active and what are being ignored or overwritten.
I have come up with a working example here:
http://jsfiddle.net/missingno/FrYdx/2/
The important part is the following CSS selector:
.paddedButton.dijitButton .dijitButtonNode {
padding: 1em;
}
This selects any node with class dijitButtonNode that descends from a node that has both of the paddedButton and dijitButton classes. I couldn't do just a .paddedButton .dijitButtonNode because then the rule would end up being cascaded by a more specific selector.