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                [https://jgraph.github.io/mxgraph/javascript/index.html](https://jgraph.github.io/mxgraph/javascript/index.html) * 設置畫布背景圖片 ~~~ const url = 'https://cdn.pixabay.com/photo/2016/02/19/11/25/business-1209705_960_720.jpg' const img = new mxImage(url, 400, 400) graph.setBackgroundImage(img) ~~~ * 禁用瀏覽器上下文菜單 ~~~ mxEvent.disableContextMenu(container) ~~~ * 使用套索選擇組件 ~~~ new mxRubberband(graph) ~~~ * 節點不可改變大小 ~~~ graph.setCellsResizeable(false) ~~~ * 是否可移動 ~~~ // 沒有了移動功能 graph.setCellsMovable(false) ? // 禁用移動功能,鼠標指針還是顯示移動指標 mxGraphHandler.prototype.setMoveEnabled(false) ~~~ * Cell 是否可連線 ~~~ graph.setConnectable(false) graph.setCellsLocked(true);// 是否可以移動連線,重新連接其他cell,主要用來展現中用 ~~~ * 邊被拖動時始終保持連接 ``` graph.setDisconnectOnMove(false) ``` * 啟用右鍵移動元素 ``` graph.setPanning(true) ``` * 禁用雙擊改變數據 ~~~ graph.dblClick = function(evt, cell) { ?const model = graph.getModel() ?if (model.isVertex(cell)) { ? ? ?return false } } ~~~ * 事件 ~~~ // 單擊 graph.click = function(evt) { ?// ... } ? // or graph.addListener(mxConstants.CLICK, function(sender, evt) { ?// ... }) ? // 雙擊 graph.dblClick = function(evt, cell) { ?// ... } ? // or graph.addListener(mxConstants.DOUBLE_CLICK, function(sender, evt) { ?// ... }) ~~~ * 節點事件監聽 ~~~ // 尺寸改變 graph.addListener(mxEvent,RESIZE_CELLS, function(sender, evt) { ?const cells = evt.getProperty('cells') // cell ?const bounds = evt.getProperty('bounds') // mxGeometry }) ? // 移動 graph.addListener(mxEvent.CELLS_MOVED, function(sender, evt) { ?// ... }) ~~~ * 自定義 Tooltip ~~~ graph.setTooltips(true) graph.getTooltipForCell = function(cell) { ?return 'xxx' } ~~~ * 預覽模式(只讀) ~~~ graph.setEnabled(false) // 預覽時鼠標懸浮到節點時,改變鼠標樣式 ? graph.getCursorForCell = function(cell) { ?if (cell != null && cell.value != null && cell.vertex == 1) { ? ? ?return 'pointer' } } ~~~ * 刪除選中的 Cell 或 Edge ~~~ const keyHandler = new mxKeyHandler(graph) keyHandler.bindKey(46, function(evt) { ?if (graph.isEnabled()) { graph.removeCells() } }) ~~~ * 使用 `mxRectangle` 操作 Cell ``` const v = graph.insertVertex(...) const geo = v.getGeometry() const rect = new mxRectangle(30, 30, 80, 30) geo.add(rect) graph.refresh(v) ``` * 創建上下文菜單 ``` mxEvent.disableContextMenu(container) graph.popupMenuHandler.factoryMethod = function(menu, cell, evt) { return function(graph, menu, cell, evt) { if (cell != null) { menu.addItem('菜單一', null, function() { console.log('1') }) } else { menu.addItem('點擊畫布', null, function() { console.log('畫布') }) } menu.addSeparator(); menu.addItem('退出', null, function() { console.log(self.graph.getSelectionCount()) }) } } ``` 注ts使用寫法為: ``` (graph.popupMenuHandler as any).factoryMethod = function(menu: mxgraph.mxPopupMenuHandler, cell: mxgraph.mxCell, evt: EventTarget) { //... } ```
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