Quasar is a popular Vue UI library for developing good looking Vue apps.
In this article, we’ll take a look at how to create Vue apps with the Quasar UI library.
Touch Repeat
We can watch the repeated touch events with the v-touch-repeat directive.
For instance, we can write:
<!DOCTYPE html>
<html>
<head>
<link
href="https://fonts.googleapis.com/css?family=Roboto:100,300,400,500,700,900|Material+Icons"
rel="stylesheet"
type="text/css"
/>
<link
href="https://cdn.jsdelivr.net/npm/quasar@1.12.13/dist/quasar.min.css"
rel="stylesheet"
type="text/css"
/>
</head>
<body class="body--dark">
<script src="https://cdn.jsdelivr.net/npm/vue@^2.0.0/dist/vue.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/quasar@1.12.13/dist/quasar.umd.min.js"></script>
<div id="q-app">
<div class="q-pa-md">
<q-card
v-touch-repeat.mouse="handleRepeat"
class="custom-area cursor-pointer bg-primary text-white shadow-2 relative-position row flex-center"
>
<div v-if="info" class="custom-info">
<pre>{{ info }}</pre>
</div>
<div v-else class="text-center">
Click/touch and hold.
</div>
</q-card>
</div>
</div>
<script>
new Vue({
el: "#q-app",
data: {
info: null
},
methods: {
handleRepeat({ evt, ...info }) {
this.info = info;
}
}
});
</script>
</body>
</html>
We can watch key presses by adding some modifiers:
<!DOCTYPE html>
<html>
<head>
<link
href="https://fonts.googleapis.com/css?family=Roboto:100,300,400,500,700,900|Material+Icons"
rel="stylesheet"
type="text/css"
/>
<link
href="https://cdn.jsdelivr.net/npm/quasar@1.12.13/dist/quasar.min.css"
rel="stylesheet"
type="text/css"
/>
</head>
<body class="body--dark">
<script src="https://cdn.jsdelivr.net/npm/vue@^2.0.0/dist/vue.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/quasar@1.12.13/dist/quasar.umd.min.js"></script>
<div id="q-app">
<div class="q-pa-md">
<q-card
v-touch-repeat:0:300:200.mouse.enter.space.72.104="handleRepeat"
class="custom-area cursor-pointer bg-primary text-white shadow-2 relative-position row flex-center"
>
<div v-if="info" class="custom-info">
<pre>{{ info }}</pre>
</div>
<div v-else class="text-center">
Click/touch and hold.
</div>
</q-card>
</div>
</div>
<script>
new Vue({
el: "#q-app",
data: {
info: null
},
methods: {
handleRepeat({ evt, ...info }) {
this.info = info;
}
}
});
</script>
</body>
</html>
The 72, 104, enter and space modifiers are the keys we are watching presses for.
Touch Swipe
We can watch swipes with the v-touch-swipe directive.
For instance, we can write:
<!DOCTYPE html>
<html>
<head>
<link
href="https://fonts.googleapis.com/css?family=Roboto:100,300,400,500,700,900|Material+Icons"
rel="stylesheet"
type="text/css"
/>
<link
href="https://cdn.jsdelivr.net/npm/quasar@1.12.13/dist/quasar.min.css"
rel="stylesheet"
type="text/css"
/>
</head>
<body class="body--dark">
<style>
.custom-area {
width: 90%;
height: 220px;
border-radius: 3px;
padding: 8px;
}
.custom-info pre {
width: 180px;
font-size: 12px;
}
</style>
<script src="https://cdn.jsdelivr.net/npm/vue@^2.0.0/dist/vue.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/quasar@1.12.13/dist/quasar.umd.min.js"></script>
<div id="q-app">
<div class="q-pa-md">
<q-card
v-touch-swipe.mouse="handleSwipe"
class="custom-area cursor-pointer bg-primary text-white shadow-2 relative-position row flex-center"
>
<div v-if="info" class="custom-info">
<pre>{{ info }}</pre>
</div>
<div v-else class="text-center">
<q-icon name="arrow_upward"></q-icon>
<div class="row items-center">
<q-icon name="arrow_back"></q-icon>
<div>Swipe in any direction</div>
<q-icon name="arrow_forward"></q-icon>
</div>
<q-icon name="arrow_downward"></q-icon>
</div>
</q-card>
</div>
</div>
<script>
new Vue({
el: "#q-app",
data: {
info: null
},
methods: {
handleSwipe({ evt, ...info }) {
this.info = info;
}
}
});
</script>
</body>
</html>
We watch for mouse drags with the mouse modifier.
Also, we can restrict the direction we’re watching with the given modifier:
<!DOCTYPE html>
<html>
<head>
<link
href="https://fonts.googleapis.com/css?family=Roboto:100,300,400,500,700,900|Material+Icons"
rel="stylesheet"
type="text/css"
/>
<link
href="https://cdn.jsdelivr.net/npm/quasar@1.12.13/dist/quasar.min.css"
rel="stylesheet"
type="text/css"
/>
</head>
<body class="body--dark">
<style>
.custom-area {
width: 90%;
height: 220px;
border-radius: 3px;
padding: 8px;
}
.custom-info pre {
width: 180px;
font-size: 12px;
}
</style>
<script src="https://cdn.jsdelivr.net/npm/vue@^2.0.0/dist/vue.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/quasar@1.12.13/dist/quasar.umd.min.js"></script>
<div id="q-app">
<div class="q-pa-md">
<q-card
v-touch-swipe.mouse.right="handleSwipe"
class="custom-area cursor-pointer bg-primary text-white shadow-2 relative-position row flex-center"
>
<div v-if="info" class="custom-info">
<pre>{{ info }}</pre>
</div>
<div v-else class="text-center">
<div class="row items-center">
swipe right
</div>
</div>
</q-card>
</div>
</div>
<script>
new Vue({
el: "#q-app",
data: {
info: null
},
methods: {
handleSwipe({ evt, ...info }) {
this.info = info;
}
}
});
</script>
</body>
</html>
Conclusion
We can watch for swipes and repeated touches with the directives that are provided by Quasar.
