//创建显示流程图的画布
createEdit: function() {
var self = this;
//创建流程图编辑器,先检查加载图形库
JxUtil.loadJxGraph();
self.editor = new mxCanvas('public/lib/graph/config/showeditor_nav.xml');
var graph = self.editor.graph;
//设置编辑器为只读
//由于设置setEnabled为false,分组块不能收缩了,所以采用下面的组合
graph.setCellsEditable(false);
graph.setCellsSelectable(false);
graph.setConnectable(false);
graph.setCellsMovable(false);
//设置导航图的任务节点的鼠标与移入移出效果
var track = new mxCellTracker(graph);
track.mouseMove = function(sender, me) {
var cell = this.getCell(me);
if (cell && self.isTask(cell)) {
//设置鼠标为样式为手状
me.getState().setCursor('pointer');
if (this.cur_cell == null) {
this.cur_cell = cell;
//设置鼠标移入节点效果
self.moveNode(cell, true);
}
} else {
//设置鼠标移出节点效果
self.moveNode(this.cur_cell, false);
this.cur_cell = null;
}
};
//捕获任务节点的鼠标点击事件
graph.addListener(mxEvent.CLICK, function(sender, evt) {
var cell = evt.getProperty('cell');
var nodeId = self.getTaskId(cell);
if (nodeId.length > 0) {
self.clickCell(self.graphId, nodeId);
}
});
},
//private 检查是否为任务节点
isTask: function(cell) {
if (cell == null) return false;
var enc = new mxCodec();
var node = enc.encode(cell);
var nodetype = node.getAttribute('nodetype');
if (nodetype == 'task') {
return true;
}
return false;
},
/**
* 给指定的节点设置背景色
* cell -- 当前节点
* isin -- true 表示鼠标在节点上,false 表示鼠标没在节点上
**/
moveNode: function(cell, isin) {
//为空与灰色的节点都不处理鼠标事件
if (cell == null) return;
if (cell.is_disabled) return;
var self = this;
var model = self.editor.graph.getModel();
model.beginUpdate();
try {
self.editor.graph.setCellStyles("strokeColor", isin?"#A1A1FF":"#C3D9FF", [cell]);
self.editor.graph.setCellStyles("fillColor", isin?"#A1A1FF":"#C3D9FF", [cell]);
} finally {
model.endUpdate();
}
}