Is it possible to combine [ngStyle] and ::ng-deep? - css

I try to build an application that can be themed completely at runtime. Therefore i want to set global settings like font-size, color, background-color etc. on my root app.component. For now i do it with predefined CSS classes:
// CSS
.font-size-16::ng-deep { font-size: 16px; }
// TS
fontSizeClass = 'font-size-16'
// HTML
<div [ngClass]="fontSizeClass"></div>
Changing the fontSizeClass string to another class works for deep styling my application. But this solution is not dynamic at all. What i actually want is to set the font-size via [ngStyle] but keep the ng::deep functionality, too.
Is that possible?
And are there reasons to not implement theming completely with JavaScript and Redux?
Thanks in advance!

Try this
using angular material radio button
if you want to make the border of the radio buttons => transparent
in HTML:
[ngClass]="{'**transparentBorder**': "--Here yours condition---"}"
in css:
a. you add the transparentBorder (that we used in HTML) to:
b. add ::ng-deep at the beginning of the CSS
c. in the Chrome Dev Tools finds all the classes that the Angular material used
in this case, there are 2 option: 1. if the radio button is checked, 2. is unchecked
result:
this is the classes when the radio button is checked
we need to add our class transparent-border to angular material classes.
::ng-deep .mat-radio-button.**transparentBorder**.mat-primary.mat-radio-checked .mat-radio-outer-circle {
border-color: transparent;
}
this is the classes when the radio button is unchecked
::ng-deep .mat-radio-button.**transparentBorder**.mat-primary .mat-radio-outer-circle { border-color: transparent; }
good luck

Related

Angular 11 Applying border to a component

I recently started learning Angular by doing a pet project.
In on of my components I use Angular's feature of conditionally applying classes to components based on the result of the predicate. Now the problem is that my click event fires and the .selected class is applied to the angular component, but when I try to change border color nothing happens. Strange thing is that I can apply some styles to that component by changing the content of the class.
enter image description here
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Try to add display: block to the .selected class or add :host { display: block } in the .scss-file of your app-product-item.

Override Angular Material CSS differently in different components

I have two components with tab groups in them. One is a main page and I have overwritten the css to make the labels larger, done using ViewEncapsulation.None. The other is a dialog, and I want to keep it small but still apply some other custom styles to it.
When I open the dialog after visiting the other tabs page, it copies all the styles, which I have figured is because ViewEncapsulation.None bleeds CSS but not exactly as expected.
Is there anyway to override Angular Material styles without changing ViewEncapsulation so that I can keep the two components separate?
Solution 1: you can put all elements of your component into a parent element with a css class and override the material style into it.(it's custom capsulation)
Note: ViewEncapsulation is none here.
component.html
<div class="my-component__container">
<!-- other elements(material) are here -->
</div>
component.scss
.my-component__container{
// override material styles here
.mat-form-field{...}
}
Solution 2: use /deep/(deprecated).(use ::ng-depp insteaded)
:host /deep/ .mat-form-field {
text-align: left !important;
}
Solution 3: don't change ViewEncapsulation , then:
:host {
.my-component__container{}
}
if you would like to customise your Angular material components and provide your own stylings, I have the following suggestions. You may use one of them.
1) Overwrite the classes on your main style.css (or style.scss, whichever you are using). If you are wondering, it is the one that is on the same directory level as your index.html, main.ts, package.json, etc. You might need to add the !important declaration.
For instance,
.mat-form-field-label {
color:blue!important;
}
2) Customising the various Angular Material directive (such as MatPlaceholder) by providing a custom class.
For instance, when we use the MatPlaceHolder, and on the component.html template,
<mat-placeholder class="placeholder">Search</mat-placeholder>
On your component.css, we can then supply the css properties to the placehodler class
.placeholder {
color: green
}
Note:
Alternatively you may use ::ng-deep, but I would strongly suggest using ::ng-deep as it will soon be deprecated.
::ng-deep .mat-dialog {
/* styles here */
/* try not to use ::ng-deep */
}
You can use ::ng-deep. Refer NgDeep

How to style Polymer dropdown menu arrow

New to Polymer, and the docs seem a little 'light' on examples. I'm trying to style a dropdown menu so everything is white on a blueish background. Most things (tabs, toast, etc.) are working, but the dropdown-menu stubbornly refuses to show the little 'arrow' button in anything other than murky grey.
Example JSBin
The styling code is:
<style>
:host {
display: block;
/* Main vars */
--ki-teal: #4790A8;
--paper-tabs-selection-bar-color: #fff;
--paper-tab-ink: #fff;
/* Toolbar colours */
paper-toolbar.ki {
--paper-toolbar-background: var(--ki-teal);
}
/* Project select dropmenu colours */
paper-dropdown-menu-light.ki {
--paper-dropdown-menu-color: #fff;
--paper-dropdown-menu-focus-color: #fff;
--paper-dropdown-menu-button: {
color: #fff;
}
--paper-input-container-color: var(--ki-teal);
--paper-input-container-focus-color: #fff;
--paper-dropdown-menu-input: {
border-bottom: none;
};
}
/* Notifications */
#toastSave {
--paper-toast-background-color: var(--ki-teal);
--paper-toast-color: white;
}
}
</style>
But the --paper-dropdown-menu-button doesn't seem to have any effect, or I'm not using it right. Any guidance appreciated.
In addition, you'll see (at least on Chrome/Windows) that the underline bar when the dropdown has focus is not aligned properly with the active tab bar. I guess that's just a Polymer CSS glitch which will get worked out eventually, unless it's something I need to take care of in the <style> section as well?
Use --iron-icon-fill-color in your paper-dropdown-menu class if you want have other iron-icons also which you don't want to style, else you can style use it in host if you want.
Another way of doing it will be giving color to mixin --paper-dropdown-menu-icon. As per paper-dropdown-menu documentation it is
A mixin that is applied to the internal icon
Lastly, if you look at the code of paper-dropdown-menu-light you'll notice that icons have default value as --disabled-text-color. So, if you change this value that should do the trick for you. I'll recommend not to use this method as this is a default variable for material design theme and Polymer has used this as default value at lot of places. So, unless to know what you are doing avoid this method.
In Polymer if an element is using some other element internally you can always refer the style guide of internal element and use it directly. Like here we are using iron-icons styles to style the icon which is inside paper-dropdown-menu
I don't think Polymer has directly mentioned this in their styling guide but you can find this detail written at the end of styling details of paper-dropdown-menu and generalise it
You can also use any of the paper-input-container and paper-menu-button style mixins and custom properties to style the internal input and menu button respectively.

Codename one: Why does the android button have a different appearance than the IOS button

I am currently styling my App with the css plugin for codename one and I cannot figure out why the default look of the Button is different for android and IOS.
In IOS it looks like this:
In Android it looks like this:
It should look like it does in IOS for all devices.
In the Css file, I have this entry for Button:
Button {
cn1-derive: Button;
background-color: #005EA8;
color: white;
}
Button.unselected {
cn1-derive: Button.unselected;
background-color: #005EA8;
color: white;
}
Button.pressed {
cn1-derive: Button.pressed;
background-color: white;
color: #005EA8;
}
Its not just the Login Button that should look like this, but All buttons. None of the Buttons looks like they should on Android, but all look like it in IOS.
In Addition, as you might notice, the look changes on click. In IOS this works as expected, In Android the text color changes on click to #0005ea8, but the background is still this grey.
What am I missing here?
This is one of the ugly parts of CSS meets CN1 themes. The problem is that your CSS theme is being applied over top of the CN1 native theme. Any properties that you set on Button will override whatever those properties were in the native theme, but there are other properties of Button from the native theme that you are not overriding.
Further, CN1 styles offer three ways to set the "background" of the component. In ascending order of priority, they are:
Background color
Background (image)
Border (9-piece borders effectively set the entire background).
If you apply two of these in the same style, then the one lower on the list (higher in number) will take priority. E.g. if you set both the background color and a 9-piece border, then you won't see the background color at all - you'll just see the 9-piece border.
So what is happening here is that you've set the background color for your button in CSS, but the native theme likely set a background image, or a 9-piece border on the Button style which is still overriding your settings.
There are a couple of solutions to your problem:
Solution 1: Override the other "background" properties
Set border: none (to ensure that you override any 9-piece border) (or set border to something). And specify the cn1-background-type: none to ensure that there isn't an image background being applied to it:
Button {
background-color: #005EA8;
color: white;
border: none;
cn1-background-type: none;
}
NOTE: You also don't need to specify cn1-derive: Button because your style name actually is Button.
Solution 2: Create your Own Button classes from the ground up
If you don't want the baggage of the native theme, just create your own style, and set it exactly how you want.
e.g.
MyButton {
...
}
And in your Java code:
btn.setUIID("MyButton");

GWT - Changing CSS hover property

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.

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