fix: 🧩 画布缩放

.vscode/extensions.json

@@ -1,3 +0,0 @@
-{
-  "recommendations": ["Vue.volar"]
-}

public/verify.json

@@ -1 +1 @@
-{"version":1721355798048}
+{"version":1721834336660}

src/views/event-page/binding-event/index.vue

@@ -2,16 +2,55 @@
 	<div id="container"></div>
 </template>
 
-<script setup lang="ts">
+<script lang="ts" setup>
 import { useWindowSize } from '@vueuse/core';
-import { onMounted } from 'vue';
+import { onMounted, ref } from 'vue';
 import Konva from 'konva/lib';
+import { Stage } from 'konva/lib/Stage';
 
 const { width, height } = useWindowSize();
+const stage = ref<Stage>();
+const SCALE_BY = 1.1;
+/**
+ * 缩放画布
+ */
+const zoomed = () => {
+	// 平台鼠标缩放
+	stage.value!.on('wheel', e => {
+		if (!stage.value) return;
+
+		// 当前缩放比例，获取X或者是Y都一样
+		const oldScaleX = stage.value!.scaleX();
+		const oldScaleY = stage.value!.scaleY();
+
+		// 当前鼠标位置
+		const pointer = stage.value!.getPointerPosition();
+		const mousePointTo = {
+			x: (pointer!.x - stage.value!.x()) / oldScaleX,
+			y: (pointer!.y - stage.value!.y()) / oldScaleY,
+		};
+
+		// 判断是向上滚动鼠标还是向下滚动鼠标，向下滚动为正。向上滚动为负
+		let direction = e.evt.deltaY > 0 ? -1 : 1;
+		if (e.evt.ctrlKey) direction = -direction;
+
+		// 新增缩放大小X轴
+		const newScaleX = direction > 0 ? oldScaleX * SCALE_BY : oldScaleX / SCALE_BY;
+		// 新的缩放大小Y轴
+		const newScaleY = direction > 0 ? oldScaleY * SCALE_BY : oldScaleY / SCALE_BY;
+		stage.value!.scale({ x: newScaleX, y: newScaleY });
+
+		const newPos = {
+			x: pointer!.x - mousePointTo.x * newScaleX,
+			y: pointer!.y - mousePointTo.y * newScaleY,
+		};
+		stage.value!.position(newPos);
+	});
+};
 
 const initial = () => {
-	const stage = new Konva.Stage({ container: 'container', width: width.value, height: height.value });
-	const layer = new Konva.Layer({ draggable: true });
+	stage.value = new Konva.Stage({ container: 'container', width: width.value, height: height.value });
+	const layer = new Konva.Layer();
 
 	// 创建文本
 	const text = new Konva.Text({
@@ -26,8 +65,8 @@ const initial = () => {
 
 	// 创建元素
 	const circle = new Konva.Circle({
-		x: stage.width() / 2,
-		y: stage.height() / 2,
+		x: stage.value!.width() / 2,
+		y: stage.value!.height() / 2,
 		radius: 70,
 		fill: 'red',
 		stroke: 'black',
@@ -43,7 +82,8 @@ const initial = () => {
 		text.text('鼠标离开');
 	});
 
-	stage.add(layer);
+	zoomed();
+	stage.value!.add(layer);
 };
 
 onMounted(() => {