click-select.ts
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const DEFAULT_TRIGGER = 'shift';
const ALLOW_EVENTS = ['shift', 'ctrl', 'alt'];
import {flatten} from "@/utils/utils";
export const SELECTED_STATE = 'selected'
export function clickSelect(G6) {
G6.registerBehavior('click-select', {
getDefaultCfg() {
return {
multiple: true,
trigger: DEFAULT_TRIGGER,
};
},
getEvents() {
if (!this.multiple) {
return {
'node:click': 'onClick',
'edge:click': 'onClick',
'canvas:click': 'onCanvasClick'
};
}
return {
'node:click': 'onClick',
'edge:click': 'onClick',
'canvas:click': 'onCanvasClick',
keyup: 'onKeyUp',
keydown: 'onKeyDown'
};
},
onClick(e) {
const self = this;
const item = e.item;
const graph = self.graph;
const autoPaint = graph.get('autoPaint');
graph.setAutoPaint(false);
// 当前是否选择有变化
let selectChangeFlag = false
if (!self.keydown || !self.multiple) {
const selected = this.getSelected()
flatten(Object.values(selected)).forEach(n => {
if (n !== item) {
if (n.hasState(SELECTED_STATE)) {
selectChangeFlag = true
graph.setItemState(n, SELECTED_STATE, false);
}
}
})
}
if (item.hasState(SELECTED_STATE)) {
return
} else {
if (self.shouldUpdate.call(self, e)) {
selectChangeFlag = true
graph.setItemState(item, SELECTED_STATE, true);
}
graph.emit('nodeselectchange', {target: item, select: true});
}
if (selectChangeFlag) {
this.emitSelectChange()
}
graph.setAutoPaint(autoPaint);
graph.paint();
// TEST: 点击时隐藏所有锚点，显示当前锚点
// graph.getNodes().forEach(node => {
// node.hideAnchor(graph)
// });
// item.showAnchor(graph)
},
onCanvasClick() {
if (this.keydown) {
return
}
const graph = this.graph;
const autoPaint = graph.get('autoPaint');
graph.setAutoPaint(false);
const selected = this.getSelected()
// 当前是否选择有变化
let selectChangeFlag = false
flatten(Object.values(selected)).forEach(n => {
if (n.hasState(SELECTED_STATE)) {
selectChangeFlag = true
graph.setItemState(n, SELECTED_STATE, false);
}
});
if (selectChangeFlag) {
this.emitSelectChange(true)
}
graph.paint();
graph.setAutoPaint(autoPaint);
},
onKeyDown(e) {
const code = e.key;
if (ALLOW_EVENTS.indexOf(code.toLowerCase()) > -1) {
this.keydown = true;
} else {
this.keydown = false;
}
},
onKeyUp() {
this.keydown = false;
},
getSelected() {
return getSelected(this.graph)
},
emitSelectChange(isClear: boolean = false) {
if (isClear) {
this.selectChange([], [])
} else {
const graph = this.graph;
const nodes = graph.findAllByState('node', SELECTED_STATE)
const edges = graph.findAllByState('edge', SELECTED_STATE)
this.selectChange(nodes, edges)
}
},
selectChange(nodes: any[], edges: any[]) {
this.graph.emit('select-change', {nodes, edges})
},
})
}
export function getSelected(graph: any) {
return {
nodes: graph.findAllByState('node', SELECTED_STATE),
edges: graph.findAllByState('edge', SELECTED_STATE)
}
}