vue-plugin-hiprint detailed instructions

vue-plugin-hiprintis a Vue.js plugin for conveniently using the HiPrint printing plugin in Vue.js applications. HiPrint is a web-based printing plug-in that enables highly customized printing functions.

Overall Code Description

Here are vue-plugin-hiprintdetailed instructions for using :

Install the plugin:
```
npm install vue-plugin-hiprint
```

Introduce and register the plugin in main.js:

import Vue from 'vue'
import HiPrint from 'vue-plugin-hiprint'

Vue.use(HiPrint)

Use HiPrint in a component:
```
<template>
  <div>
    <button @click="print">打印</button>
  </div>
</template>

<script>
export default {
  methods: {
    print() {
      // 使用 this.$hiprint 方法调用 HiPrint 插件
      this.$hiprint.print({
        template: '<h1>Hello, HiPrint!</h1>',
        styles: `
          h1 {
            color: red;
          }
        `
      })
    }
  }
}
</script>
```
Use the method in the method of the component this.$hiprint.printto call the HiPrint plugin. Pass a configuration object as an argument, which contains the template and styles for printing.

The configuration items supported by HiPrint include:
- template: The printed template, which can be an HTML string or a DOM element.
- styles: The printed style, which can be a CSS string or an object. If it is an object, it will be automatically converted to a CSS string.
- timeout: The delay time of printing, in milliseconds, the default is 500ms.
Print in browser:

After clicking the print button, HiPrint will open a new window in the browser and render the printed content into this window. Users can perform printing operations in this window, select a printer and print settings.

Note: The HiPrint plug-in depends on the HiPrint printing plug-in itself, so you need to ensure that the HiPrint plug-in has been correctly introduced before using the plug-in.

The above are vue-plugin-hiprintthe detailed instructions for using . Use this plugin to easily implement custom printing functions in Vue.js applications.

Build visual drag-and-drop designs

The process of building a visual drag-and-drop design typically involves the following steps:

Interface design: First of all, it is necessary to design a visual drag-and-drop design interface, including the drag-and-drop area, toolbar, property panel, etc. The interface design should take into account the user's operating habits and ease of use.
Drag and drop function implementation: Use front-end frameworks (such as Vue.js, React, etc.) to implement drag and drop functions. You can use HTML5's drag-and-drop API or third-party libraries (such as Draggable.js, Vue.Draggable, etc.) to implement the drag-and-drop function. By listening to the drag event, the drag and drop of the element can be realized.
Componentization of elements: Abstract draggable elements into components for reuse in the drag area. Each component can have its own properties and styles, which can be edited and modified through the property panel.
Attribute editing: Provide an attribute panel for each draggable element, and edit and modify the attribute of the element in the panel. Attribute editing can be achieved using components such as forms, drop-down boxes, and color pickers.
Save and load: Realize the function of saving and loading the design, and the designed data can be saved to the database or local storage, so that the design can be restored the next time it is loaded.
Export design: implement the function of exporting the design as a picture, PDF or other formats, so that users can save or share the design.
Responsive design: Considering the screen size and resolution of different devices, it is necessary to ensure that the visual drag and drop design can be displayed and operated normally on different devices.

The above are the general steps to build a visual drag-and-drop design. In the specific implementation process, it can be adjusted and expanded according to requirements and technology selection.

Build draggable elements

The ability to build draggable elements can be implemented using HTML5's drag-and-drop API or third-party libraries. The following uses Vue.js and Vue.Draggable library as an example to introduce how to build the function of draggable elements:

Install Vue.js and Vue.Draggable libraries:
```
npm install vue vue-draggable
```
Use Vue.Draggable in Vue components:
```
<template>
  <div>
    <draggable v-model="elements" :options="draggableOptions">
      <div v-for="(element, index) in elements" :key="element.id" :style="{ left: element.x + 'px', top: element.y + 'px' }" class="draggable-element">
        {
     
     { element.text }}
      </div>
    </draggable>
  </div>
</template>

<script>
import draggable from 'vuedraggable';

export default {
  components: {
    draggable,
  },
  data() {
    return {
      elements: [
        { id: 1, text: 'Element 1', x: 0, y: 0 },
        { id: 2, text: 'Element 2', x: 100, y: 100 },
        { id: 3, text: 'Element 3', x: 200, y: 200 },
      ],
      draggableOptions: {
        draggable: '.draggable-element',
        onEnd: this.onDragEnd,
      },
    };
  },
  methods: {
    onDragEnd(event) {
      const { newIndex, oldIndex } = event;
      const movedElement = this.elements.splice(oldIndex, 1)[0];
      this.elements.splice(newIndex, 0, movedElement);
    },
  },
};
</script>

<style>
.draggable-element {
  position: absolute;
  background-color: #f0f0f0;
  padding: 10px;
  cursor: move;
}
</style>
```
In the above code, we use the Vue.Draggable library to implement the function of draggable elements. In Vue components, we use <draggable>components to wrap elements that need to be dragged. v-forTraverse the array through the command elementsand render each element as a draggable <div>element. We bidirectionally bind the array to the dragging component by setting v-modelthe directive elementsso that the position of the element can be updated during the dragging process. By setting optionsproperties, we can configure the behavior of dragging, such as specifying a draggable element selector, setting a callback function when dragging ends, and so on.

In onDragEndthe method, we handle the logic when the drag ends. By getting the old and new indexes of the drag, we can determine that the position of the dragged element in elementsthe array has changed. We use splicethe method to remove the dragged element from its original position and insert it into a new position.

Finally, we set the style of the draggable element through CSS style, such as setting the position of the element, background color, etc.

The above is an example of building a draggable element using the Vue.Draggable library. You can choose a suitable library or method according to your specific needs and technical selection to realize the function of draggable elements.