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hello uni-app x
提交 03d13d69 编写于 作者: 张 张磊
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修改draw代码爆红

上级 9e24e924
隐藏空白更改
内联 并排
Showing with 120 addition and 120 deletion
pages/API/element-draw/element-draw.uvue
浏览文件 @ 03d13d69
...@@ -59,66 +59,66 @@ ...@@ -59,66 +59,66 @@
drawText() { drawText() {
let element = uni.getElementById('draw-text-view') let element = uni.getElementById('draw-text-view')
let ctx = element!.getDrawableContext() let ctx = element!.getDrawableContext()
let width = element.getBoundingClientRect().width let width = element!.getBoundingClientRect().width
ctx!.reset() ctx!.reset()
ctx.font = "15px" ctx!.font = "15px"
ctx.textAlign = "center" ctx!.textAlign = "center"
for (var i = 0; i < this.texts.length; i++) { for (var i = 0; i < this.texts.length; i++) {
let value = this.texts[i] let value = this.texts[i]
if (i % 2 == 0) { if (i % 2 == 0) {
ctx.fillText(value, width / 2, (20 * (i + 1))) ctx!.fillText(value, width / 2, (20 * (i + 1)))
} else { } else {
ctx.strokeText(value, width / 2, (20 * (i + 1))) ctx!.strokeText(value, width / 2, (20 * (i + 1)))
} }
} }
ctx.update() ctx!.update()
}, },
drawLines() { drawLines() {
let ctx = uni.getElementById('draw-line-view')!.getDrawableContext() let ctx = uni.getElementById('draw-line-view')!.getDrawableContext()
ctx!.reset() ctx!.reset()
ctx.lineWidth = 10; ctx!.lineWidth = 10;
["round", "bevel", "miter"].forEach((join, i) => { ["round", "bevel", "miter"].forEach((join, i) => {
ctx.lineJoin = join; ctx!.lineJoin = join;
ctx.beginPath(); ctx!.beginPath();
ctx.moveTo(5, 10 + i * 40); ctx!.moveTo(5, 10 + i * 40);
ctx.lineTo(50, 50 + i * 40); ctx!.lineTo(50, 50 + i * 40);
ctx.lineTo(90, 10 + i * 40); ctx!.lineTo(90, 10 + i * 40);
ctx.lineTo(130, 50 + i * 40); ctx!.lineTo(130, 50 + i * 40);
ctx.lineTo(170, 10 + i * 40); ctx!.lineTo(170, 10 + i * 40);
ctx.stroke(); ctx!.stroke();
}); });
ctx.lineWidth = 1 ctx!.lineWidth = 1
var space = 170 var space = 170
ctx.strokeStyle = '#09f'; ctx!.strokeStyle = '#09f';
ctx.beginPath(); ctx!.beginPath();
ctx.moveTo(10 + space, 10); ctx!.moveTo(10 + space, 10);
ctx.lineTo(140 + space, 10); ctx!.lineTo(140 + space, 10);
ctx.moveTo(10 + space, 140); ctx!.moveTo(10 + space, 140);
ctx.lineTo(140 + space, 140); ctx!.lineTo(140 + space, 140);
ctx.stroke(); ctx!.stroke();
// Draw lines // Draw lines
ctx.strokeStyle = 'black'; ctx!.strokeStyle = 'black';
['butt', 'round', 'square'].forEach((lineCap, i) => { ['butt', 'round', 'square'].forEach((lineCap, i) => {
ctx.lineWidth = 15; ctx!.lineWidth = 15;
ctx.lineCap = lineCap; ctx!.lineCap = lineCap;
ctx.beginPath(); ctx!.beginPath();
ctx.moveTo(25 + space + i * 50, 10); ctx!.moveTo(25 + space + i * 50, 10);
ctx.lineTo(25 + space + i * 50, 140); ctx!.lineTo(25 + space + i * 50, 140);
ctx.stroke(); ctx!.stroke();
}); });
ctx.lineWidth = 1; ctx!.lineWidth = 1;
this.drawDashedLine([], ctx); this.drawDashedLine([], ctx!);
this.drawDashedLine([2, 2], ctx); this.drawDashedLine([2, 2], ctx!);
this.drawDashedLine([10, 10], ctx); this.drawDashedLine([10, 10], ctx!);
this.drawDashedLine([20, 5], ctx); this.drawDashedLine([20, 5], ctx!);
this.drawDashedLine([15, 3, 3, 3], ctx); this.drawDashedLine([15, 3, 3, 3], ctx!);
this.drawDashedLine([20, 3, 3, 3, 3, 3, 3, 3], ctx); this.drawDashedLine([20, 3, 3, 3, 3, 3, 3, 3], ctx!);
ctx.lineDashOffset = 18; ctx!.lineDashOffset = 18;
this.drawDashedLine([12, 3, 3], ctx); this.drawDashedLine([12, 3, 3], ctx!);
ctx.lineDashOffset = 0 ctx!.lineDashOffset = 0
ctx.setLineDash([0]) ctx!.setLineDash([0])
ctx.update() ctx!.update()
}, },
drawDashedLine(pattern : Array<number>, ctx : DrawableContext) { drawDashedLine(pattern : Array<number>, ctx : DrawableContext) {
ctx.beginPath(); ctx.beginPath();
...@@ -134,7 +134,7 @@ ...@@ -134,7 +134,7 @@
// Draw shapes // Draw shapes
for (var i = 0; i < 4; i++) { for (var i = 0; i < 4; i++) {
for (var j = 0; j < 3; j++) { for (var j = 0; j < 3; j++) {
ctx.beginPath(); ctx!.beginPath();
var x = 25 + j * 50; // x coordinate var x = 25 + j * 50; // x coordinate
var y = 25 + i * 50; // y coordinate var y = 25 + i * 50; // y coordinate
var radius = 20; // Arc radius var radius = 20; // Arc radius
...@@ -142,22 +142,22 @@ ...@@ -142,22 +142,22 @@
var endAngle = Math.PI + (Math.PI * j) / 2; // End point on circle var endAngle = Math.PI + (Math.PI * j) / 2; // End point on circle
var clockwise = i % 2 == 0 ? false : true; // clockwise or anticlockwise var clockwise = i % 2 == 0 ? false : true; // clockwise or anticlockwise
ctx.arc(x, y, radius, startAngle, endAngle, clockwise); ctx!.arc(x, y, radius, startAngle, endAngle, clockwise);
if (i > 1) { if (i > 1) {
ctx.fill(); ctx!.fill();
} else { } else {
ctx.stroke(); ctx!.stroke();
} }
} }
} }
ctx.update() ctx!.update()
}, },
drawStar() { drawStar() {
let ctx = uni.getElementById('draw-dash-line')!.getDrawableContext() let ctx = uni.getElementById('draw-dash-line')!.getDrawableContext()
ctx!.reset() ctx!.reset()
ctx.beginPath(); ctx!.beginPath();
var horn = 5; // 画5个角 var horn = 5; // 画5个角
var angle = 360 / horn; // 五个角的度数 var angle = 360 / horn; // 五个角的度数
// 两个圆的半径 // 两个圆的半径
...@@ -169,45 +169,45 @@ ...@@ -169,45 +169,45 @@
for (var i = 0; i < horn; i++) { for (var i = 0; i < horn; i++) {
// 角度转弧度：角度/180*Math.PI // 角度转弧度：角度/180*Math.PI
// 外圆顶点坐标 // 外圆顶点坐标
ctx.lineTo(Math.cos((18 + i * angle) / 180.0 * Math.PI) * R + x, -Math.sin((18 + i * angle) / 180.0 * Math.PI) * R + y); ctx!.lineTo(Math.cos((18 + i * angle) / 180.0 * Math.PI) * R + x, -Math.sin((18 + i * angle) / 180.0 * Math.PI) * R + y);
// 內圆顶点坐标 // 內圆顶点坐标
ctx.lineTo(Math.cos((54 + i * angle) / 180.0 * Math.PI) * r + x, -Math.sin((54 + i * angle) / 180.0 * Math.PI) * r + y); ctx!.lineTo(Math.cos((54 + i * angle) / 180.0 * Math.PI) * r + x, -Math.sin((54 + i * angle) / 180.0 * Math.PI) * r + y);
} }
// closePath：关闭路径，将路径的终点与起点相连 // closePath：关闭路径，将路径的终点与起点相连
ctx.closePath(); ctx!.closePath();
ctx.lineWidth = 3; ctx!.lineWidth = 3;
ctx.fillStyle = '#E4EF00'; ctx!.fillStyle = '#E4EF00';
ctx.strokeStyle = "red"; ctx!.strokeStyle = "red";
ctx.fill(); ctx!.fill();
ctx.stroke(); ctx!.stroke();
ctx.lineWidth = 10; ctx!.lineWidth = 10;
ctx.beginPath() ctx!.beginPath()
ctx.moveTo(170, 100) ctx!.moveTo(170, 100)
ctx.lineTo(255, 15) ctx!.lineTo(255, 15)
ctx.lineTo(340, 100) ctx!.lineTo(340, 100)
ctx.closePath() ctx!.closePath()
ctx.fill() ctx!.fill()
ctx.strokeStyle = "blue" ctx!.strokeStyle = "blue"
ctx.stroke() ctx!.stroke()
ctx.beginPath() ctx!.beginPath()
ctx.moveTo(170, 145) ctx!.moveTo(170, 145)
ctx.lineTo(255, 45) ctx!.lineTo(255, 45)
ctx.lineTo(340, 145) ctx!.lineTo(340, 145)
ctx.closePath() ctx!.closePath()
ctx.fill() ctx!.fill()
ctx.strokeStyle = "gray" ctx!.strokeStyle = "gray"
ctx.stroke() ctx!.stroke()
// 未设置beginPath，导致上下表现一致，与前端一致 // 未设置beginPath，导致上下表现一致，与前端一致
ctx.moveTo(170, 190) ctx!.moveTo(170, 190)
ctx.lineTo(255, 90) ctx!.lineTo(255, 90)
ctx.lineTo(340, 190) ctx!.lineTo(340, 190)
ctx.closePath() ctx!.closePath()
ctx.fillStyle = "orange" ctx!.fillStyle = "orange"
ctx.fill() ctx!.fill()
ctx.strokeStyle = "khaki" ctx!.strokeStyle = "khaki"
ctx.stroke() ctx!.stroke()
ctx.update() ctx!.update()
}, },
hex(num : number) : string { hex(num : number) : string {
if (num == 0) { if (num == 0) {
...@@ -228,80 +228,80 @@ ...@@ -228,80 +228,80 @@
drawhouse() { drawhouse() {
let ctx = uni.getElementById('draw-house')!.getDrawableContext() let ctx = uni.getElementById('draw-house')!.getDrawableContext()
ctx!.reset() ctx!.reset()
ctx.lineWidth = 10; ctx!.lineWidth = 10;
// Wall // Wall
ctx.strokeRect(75, 140, 150, 110); ctx!.strokeRect(75, 140, 150, 110);
// Door // Door
ctx.fillRect(130, 190, 40, 60); ctx!.fillRect(130, 190, 40, 60);
// Roof // Roof
ctx.beginPath(); ctx!.beginPath();
ctx.moveTo(50, 140); ctx!.moveTo(50, 140);
ctx.lineTo(150, 60); ctx!.lineTo(150, 60);
ctx.lineTo(250, 140); ctx!.lineTo(250, 140);
ctx.closePath(); ctx!.closePath();
ctx.stroke(); ctx!.stroke();
ctx.update() ctx!.update()
}, },
drawPoint() { drawPoint() {
let ctx = uni.getElementById('draw-style')!.getDrawableContext() let ctx = uni.getElementById('draw-style')!.getDrawableContext()
ctx!.reset() ctx!.reset()
for (let i = 0; i < 6; i++) { for (let i = 0; i < 6; i++) {
for (let j = 0; j < 6; j++) { for (let j = 0; j < 6; j++) {
ctx.strokeStyle = `rgb(0,${Math.floor(255 - 42.5 * i)},${Math.floor(255 - 42.5 * j)})`; ctx!.strokeStyle = `rgb(0,${Math.floor(255 - 42.5 * i)},${Math.floor(255 - 42.5 * j)})`;
ctx.beginPath(); ctx!.beginPath();
ctx.arc(12.5 + j * 25, 12.5 + i * 25, 10, 0, Math.PI * 2, true); ctx!.arc(12.5 + j * 25, 12.5 + i * 25, 10, 0, Math.PI * 2, true);
ctx.stroke(); ctx!.stroke();
} }
} }
for (let i = 0; i < 6; i++) { for (let i = 0; i < 6; i++) {
for (let j = 0; j < 6; j++) { for (let j = 0; j < 6; j++) {
ctx.fillStyle = `rgb(${Math.floor(255 - 42.5 * i)},${Math.floor(255 - 42.5 * j)},0)`; ctx!.fillStyle = `rgb(${Math.floor(255 - 42.5 * i)},${Math.floor(255 - 42.5 * j)},0)`;
ctx.fillRect(180 + j * 25, i * 25, 25, 25); ctx!.fillRect(180 + j * 25, i * 25, 25, 25);
} }
} }
ctx.update() ctx!.update()
}, },
drawRect() { drawRect() {
let ctx = uni.getElementById('draw-odd')!.getDrawableContext() let ctx = uni.getElementById('draw-odd')!.getDrawableContext()
ctx!.reset() ctx!.reset()
// Create path // Create path
ctx.moveTo(30, 90); ctx!.moveTo(30, 90);
ctx.lineTo(110, 20); ctx!.lineTo(110, 20);
ctx.lineTo(240, 130); ctx!.lineTo(240, 130);
ctx.lineTo(60, 130); ctx!.lineTo(60, 130);
ctx.lineTo(190, 20); ctx!.lineTo(190, 20);
ctx.lineTo(270, 90); ctx!.lineTo(270, 90);
ctx.closePath(); ctx!.closePath();
// Fill path // Fill path
ctx.fillStyle = "green"; ctx!.fillStyle = "green";
ctx.fill("evenodd"); ctx!.fill("evenodd");
ctx.update() ctx!.update()
}, },
drawArcTo() { drawArcTo() {
let ctx = uni.getElementById('draw-arcto')!.getDrawableContext() let ctx = uni.getElementById('draw-arcto')!.getDrawableContext()
ctx!.reset() ctx!.reset()
ctx.beginPath(); ctx!.beginPath();
ctx.moveTo(50, 20); ctx!.moveTo(50, 20);
ctx.bezierCurveTo(230, 30, 150, 60, 50, 100); ctx!.bezierCurveTo(230, 30, 150, 60, 50, 100);
ctx.stroke(); ctx!.stroke();
ctx.fillStyle = "blue"; ctx!.fillStyle = "blue";
// start point // start point
ctx.fillRect(50, 20, 10, 10); ctx!.fillRect(50, 20, 10, 10);
// end point // end point
ctx.fillRect(50, 100, 10, 10); ctx!.fillRect(50, 100, 10, 10);
ctx.fillStyle = "red"; ctx!.fillStyle = "red";
// control point one // control point one
ctx.fillRect(230, 30, 10, 10); ctx!.fillRect(230, 30, 10, 10);
// control point two // control point two
ctx.fillRect(150, 70, 10, 10); ctx!.fillRect(150, 70, 10, 10);
ctx.update() ctx!.update()
} }
} }
} }
......
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