微信小程序传奇电脑版怎么键盘 *** 作

微信小程序传奇电脑版键盘 *** 作说明：

1. WASD 控制角色的面向及行走；

2. Tab 开启/关闭地图；

3. 空格键跳跃；

4. Ctrl+鼠标左键点击可以攻击怪物；

5. 鼠标右键点击可以使用物品；

6. 1-9键可以使用英雄背包里的物品；

7. Shift+鼠标左键可以普通拾取；

8. Shift+鼠标右键可以快速拾取；

9. F1-F5键可以使用快捷键功能；

10. Enter键用于聊天；

整个功能基于canvas实现，首先添加画布组件，并设定样式

<!--index.wxml--><view class="container">

<canvas canvas-id="id-gesture-lock" class="gesture-lock" bindtouchstart="onTouchStart"

bindtouchmove="onTouchMove" bindtouchend="onTouchEnd"></canvas></view>.gesture-lock {

margin: 100rpx auto

width: 300px

height: 300px

background-color: #ffffff

}123456789101112

手势解锁实现代码在gesture_lock.js中(完整源码地址见末尾)。

初始化

constructor(canvasid, context, cb, opt){this.touchPoints = [] this.checkPoints = [] this.canvasid = canvasid this.ctx = context this.width = opt &&opt.width || 300//画布长度

this.height = opt &&opt.height || 300//画布宽度

this.cycleNum = opt &&opt.cycleNum || 3 this.radius = 0 //触摸点半径

this.isParamOk = false this.marge = this.margeCircle = 25//触摸点及触摸点和画布边界间隔

this.initColor = opt &&opt.initColor || '#C5C5C3'

this.checkColor = opt &&opt.checkColor || '#5AA9EC' this.errorColor = opt &&opt.errorColor || '#e19984' this.touchState = "unTouch" this.checkParam() this.lastCheckPoint = null if (this.isParamOk) {// 计算触摸点的半径长度

this.radius = (this.width - this.marge * 2 - (this.margeCircle * (this.cycleNum - 1))) / (this.cycleNum * 2)this.radius = Math.floor(this.radius) // 计算每个触摸点的圆心位置

this.calCircleParams()

}this.onEnd = cb//滑动手势结束时的回调函数

}1234567891011121314151617181920212223242526

主要设置一些参数，如canvas的长宽，canvas的context，手势锁的个数(3乘3, 4乘4)，手势锁的颜色，手势滑动结束时的回调函数等。并计算出手势锁的半径。

计算每个手势锁的圆心位置

calCircleParams() {let n = this.cycleNum let count = 0 for (let i = 0i <ni++) {for (let j = 0j <nj++){

count++ let touchPoint = {

x: this.marge + i * (this.radius * 2 + this.margeCircle) + this.radius,

y: this.marge + j * (this.radius * 2 + this.margeCircle) + this.radius,

index: count,

check: "uncheck",

}this.touchPoints.push(touchPoint)

}

}

}1234567891011121314151617

绘制手势锁

for (let i = 0i <this.touchPoints.lengthi++){this.drawCircle(this.touchPoints[i].x, this.touchPoints[i].y, this.radius, this.initColor)

} this.ctx.draw(true)1234

接下来就是识别用户的滑动行为，判断用户划过了哪些圆圈，进而识别出用户的手势。

在touchstart和touchmove事件中检测触发并更新画布

onTouchStart(e) {// 不识别多点触控

if (e.touches.length >1){this.touchState = "unTouch" return

}this.touchState = "startTouch" this.checkTouch(e) let point = {x:e.touches[0].x, y:e.touches[0].y} this.drawCanvas(this.checkColor, point)

}

onTouchMove(e) {if (e.touchState === "unTouch") {return

}if (e.touches.length >1){this.touchState = "unTouch" return

}this.checkTouch(e) let point = {x:e.touches[0].x, y:e.touches[0].y} this.drawCanvas(this.checkColor, point)

}123456789101112131415161718192021222324

检测用户是否划过某个圆圈

checkTouch(e) {for (let i = 0i <this.touchPoints.lengthi++){let point = this.touchPoints[i] if (isPointInCycle(e.touches[0].x, e.touches[0].y, point.x, point.y, this.radius)) {if (point.check === 'uncheck') {this.checkPoints.push(point) this.lastCheckPoint = point

}

point.check = "check"

return

}

}

}12345678910111213

更新画布

drawCanvas(color, point) {//每次更新之前先清空画布

this.ctx.clearRect(0, 0, this.width, this.height) //使用不同颜色和形式绘制已触发和未触发的锁

for (let i = 0i <this.touchPoints.lengthi++){let point = this.touchPoints[i] if (point.check === "check") {this.drawCircle(point.x, point.y, this.radius, color) this.drawCircleCentre(point.x, point.y, color)

}else {this.drawCircle(this.touchPoints[i].x, this.touchPoints[i].y, this.radius, this.initColor)

}

}//绘制已识别锁之间的线段

if (this.checkPoints.length >1) { let lastPoint = this.checkPoints[0]for (let i = 1i <this.checkPoints.lengthi++) { this.drawLine(lastPoint, this.checkPoints[i], color)

lastPoint = this.checkPoints[i]

}

}//绘制最后一个识别锁和当前触摸点之间的线段

if (this.lastCheckPoint &&point) {this.drawLine(this.lastCheckPoint, point, color)

}this.ctx.draw(true)

}12345678910111213141516171819202122232425262728

当用户滑动结束时调用回调函数并传递识别出的手势

onTouchEnd(e) {typeof this.onEnd === 'function' &&this.onEnd(this.checkPoints, false)

}

onTouchCancel(e) {typeof this.onEnd === 'function' &&this.onEnd(this.checkPoints, true)

}1234567

重置和显示手势错误

gestureError() {this.drawCanvas(this.errorColor)

}

reset() {for (let i = 0i <this.touchPoints.lengthi++) {this.touchPoints[i].check = 'uncheck'

}this.checkPoints = [] this.lastCheckPoint = null this.drawCanvas(this.initColor)

}123456789101112

如何调用

在onload方法中创建lock对象并在用户触摸事件中调用相应方法

onLoad: function () {

var s = this this.lock = new Lock("id-gesture-lock", wx.createCanvasContext("id-gesture-lock"), function(checkPoints, isCancel) {

console.log('over')

s.lock.gestureError()

setTimeout(function() {

s.lock.reset()

}, 1000)

}, {width:300, height:300})this.lock.drawGestureLock()

console.log('onLoad')var that = this

//调用应用实例的方法获取全局数据

app.getUserInfo(function(userInfo){

//更新数据

that.setData({

userInfo:userInfo

})

that.update()

})

},

onTouchStart: function (e) {

this.lock.onTouchStart(e)

},

onTouchMove: function (e) {

this.lock.onTouchMove(e)

},

onTouchEnd: function (e) {

this.lock.onTouchEnd(e)

}

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