commit all stuff

src/components/HelloWorld.vue

@@ -1,58 +0,0 @@
-<template>
-  <div class="hello">
-    <h1>{{ msg }}</h1>
-    <p>
-      For a guide and recipes on how to configure / customize this project,<br>
-      check out the
-      <a href="https://cli.vuejs.org" target="_blank" rel="noopener">vue-cli documentation</a>.
-    </p>
-    <h3>Installed CLI Plugins</h3>
-    <ul>
-      <li><a href="https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-babel" target="_blank" rel="noopener">babel</a></li>
-      <li><a href="https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-eslint" target="_blank" rel="noopener">eslint</a></li>
-    </ul>
-    <h3>Essential Links</h3>
-    <ul>
-      <li><a href="https://vuejs.org" target="_blank" rel="noopener">Core Docs</a></li>
-      <li><a href="https://forum.vuejs.org" target="_blank" rel="noopener">Forum</a></li>
-      <li><a href="https://chat.vuejs.org" target="_blank" rel="noopener">Community Chat</a></li>
-      <li><a href="https://twitter.com/vuejs" target="_blank" rel="noopener">Twitter</a></li>
-      <li><a href="https://news.vuejs.org" target="_blank" rel="noopener">News</a></li>
-    </ul>
-    <h3>Ecosystem</h3>
-    <ul>
-      <li><a href="https://router.vuejs.org" target="_blank" rel="noopener">vue-router</a></li>
-      <li><a href="https://vuex.vuejs.org" target="_blank" rel="noopener">vuex</a></li>
-      <li><a href="https://github.com/vuejs/vue-devtools#vue-devtools" target="_blank" rel="noopener">vue-devtools</a></li>
-      <li><a href="https://vue-loader.vuejs.org" target="_blank" rel="noopener">vue-loader</a></li>
-      <li><a href="https://github.com/vuejs/awesome-vue" target="_blank" rel="noopener">awesome-vue</a></li>
-    </ul>
-  </div>
-</template>
-
-<script>
-export default {
-  name: 'HelloWorld',
-  props: {
-    msg: String
-  }
-}
-</script>
-
-<!-- Add "scoped" attribute to limit CSS to this component only -->
-<style scoped>
-h3 {
-  margin: 40px 0 0;
-}
-ul {
-  list-style-type: none;
-  padding: 0;
-}
-li {
-  display: inline-block;
-  margin: 0 10px;
-}
-a {
-  color: #42b983;
-}
-</style>

src/components/JoyStick.vue

@@ -0,0 +1,127 @@
+<style>
+.vue-joystick {
+  display: inline-block;
+  background: white;
+  height: 256px;
+  width: 256px;
+  border-radius: 50%;
+  position: relative;
+  border: solid 4px var(--color);
+}
+.vue-joystick::before,
+.vue-joystick::after {
+  content: "";
+  position: absolute;
+}
+.vue-joystick::before {
+  left: 0;
+  right: 0;
+  margin: -32px;
+  background: var(--color);
+  height: 64px;
+  width: 64px;
+  border-radius: 50%;
+  transform: translateX(var(--x)) translateY(var(--y));
+}
+.vue-joystick::after {
+  left: 126px;
+  bottom: 128px;
+  border-radius: 10px;
+  width: 4px;
+  background: var(--color);
+  transform: rotate(var(--angle));
+  transform-origin: bottom center;
+  height: var(--speed);
+}
+</style>
+<template>
+  <div
+      class="vue-joystick"
+      :style="style"
+      @touchmove="handleTouch"
+      @mousemove="handleMove"
+      @mousedown="handleStart"
+      @mouseup="handleRelease"
+      @touchend="handleRelease"
+  ></div>
+</template>
+<script>
+export default {
+  props: {
+    color: {
+      type: String,
+      default: "#25B"
+    }
+  },
+  data() {
+    return {
+      x: 0,
+      y: 0,
+      angle: 0,
+      speed: 0,
+      isMouseDown: false
+    };
+  },
+  computed: {
+    style() {
+      return {
+        "--x": `${this.x + 128}px`,
+        "--y": `${this.y + 128}px`,
+        "--speed": `${this.speed}px`,
+        "--angle": `${this.angle}deg`,
+        "--color": `${this.color}`
+      };
+    }
+  },
+  methods: {
+    handleStart() {
+      this.isMouseDown = true;
+    },
+    handleTouch({ touches: [touch] }) {
+      const { clientX, clientY } = touch;
+      const { offsetLeft, offsetTop } = this.$el;
+      const x = Math.round(clientX - offsetLeft - 128);
+      const y = Math.round(clientY - offsetTop - 128);
+      this.updatePosition(x, y);
+    },
+    handleMove({ clientX, clientY }) {
+      if (!this.isMouseDown) {
+        return;
+      }
+      const { offsetLeft, offsetTop } = this.$el;
+      const x = Math.round(clientX - offsetLeft - 128);
+      const y = Math.round(clientY - offsetTop - 128);
+      this.updatePosition(x, y);
+    },
+    handleRelease() {
+      this.emitAll("release");
+      this.isMouseDown = false;
+      this.updatePosition(0, 0);
+    },
+    updatePosition(x, y) {
+      const offset = 128 - 32;
+      const radians = Math.atan2(y, x);
+      const angle = Math.round((radians * 180) / Math.PI, 4);
+      this.angle = angle + (angle > 90 ? -270 : 90);
+      this.speed = Math.min(
+          Math.round(Math.sqrt(Math.pow(y, 2) + Math.pow(x, 2))),
+          128
+      );
+      this.x = this.speed > offset ? Math.cos(radians) * offset : x;
+      this.y = this.speed >= offset ? Math.sin(radians) * offset : y;
+      this.emitAll();
+    },
+    emitAll(name = "change") {
+      this.$emit(name, {
+        x: this.x,
+        y: this.y,
+        speed: this.speed,
+        angle: this.angle
+      });
+    }
+  },
+  mounted() {
+    this.emitAll();
+  }
+};
+</script>