js: add gesture api

doric-js/src/widget/gesture.ts

@@ -0,0 +1,78 @@
+/*
+ * Copyright [2019] [Doric.Pub]
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import { Property, View } from "../ui/view"
+import { Stack } from "../widget/layouts"
+import { layoutConfig } from "../util/layoutconfig"
+
+export enum SwipeOrientation {
+    LEFT, RIGHT, TOP, BOTTOM
+}
+
+export class GestureContainer extends Stack {
+    @Property
+    onSingleTap?: () => void
+
+    @Property
+    onDoubleTap?: () => void
+
+    @Property
+    onLongPress?: () => void
+
+    /**
+     * Called when the fingers in pinching on screen
+     * @param scale: the numeric value of scale on pinch
+     */
+    @Property
+    onPinch?: (scale: number) => void
+
+    /**
+     * Called when the fingers are scrolling or paning
+     * @param dx: the value of the change on the x-axis
+     * @param dy: the value of the change on the y-axis
+     */
+    @Property
+    onPan?: (dx: number, dy: number) => void
+
+    /**
+     * Called when the fingers are scrolling or paning
+     * @param dAngle: the value of the angle change from last rotate in radian
+     */
+    @Property
+    onRotate?: (dAngle: number) => void
+
+    /**
+     * Called when the fingers has swiped on screen
+     * @param orientation: the orientation of this swipe
+     */
+    @Property
+    onSwipe?: (orientation: SwipeOrientation) => void
+}
+
+export function gestureContainer(views: View | View[], config?: Partial<GestureContainer>) {
+    const ret = new GestureContainer
+    ret.layoutConfig = layoutConfig().fit()
+    if (views instanceof View) {
+        ret.addChild(views)
+    } else {
+        views.forEach(e => {
+            ret.addChild(e)
+        })
+    }
+    if (config) {
+        ret.apply(config)
+    }
+    return ret
+}

doric-js/src/widget/index.widget.ts

@@ -24,4 +24,5 @@ export * from './flowlayout'
 export * from './input'
 export * from './nestedSlider'
 export * from './draggable'
-export * from './switch'
+export * from './switch'
+export * from './gesture'