JS组件系列——JsPlumb流程图及相关效果详解（二：附源码）

前言：上篇JS组件系列——JsPlumb流程图及相关效果详解介绍了下JsPlumb在浏览器里面画流程图的效果展示，以及简单的JsPlumb代码示例。这篇还是接着来看看各个效果的代码说明。

一、设置连线的样式和颜色效果代码示例

大概的效果如图：

这些效果看着很简单，那么，我们如何用代码去实现它呢。上章我们说过，JsPlumb的连线样式是由点的某些属性决定的，既然如此，我们就通过设置点的样式来动态改变连线的样式即可。来看代码：

首先来看看连线类型的那个select

 <div id="btn_linetype" class="divMenuBtn btn-default btn">
    连线类型：
　　<select id="sel_linetype" style="width:80px;height:20px">
　　　　<option value="2">直线</option>
　　　　<option value="1">折线</option>
　　　　<option value="3">曲线</option>
　　</select>
</div>

在页面初始化的时候注册select的change事件

//全局的空心圆端点样式设置
var hollowCircle = {
    DragOptions: { cursor: 'pointer', zIndex: 2000 },
    endpoint: ["Dot", { radius: 7 }],  //端点的形状
    connectorStyle: connectorPaintStyle,//连接线的颜色，大小样式
    connectorHoverStyle: connectorHoverStyle,
    paintStyle: {
        strokeStyle: "#1e8151",
        fillStyle: "transparent",
        radius: 5,
        lineWidth: 2
    },        //端点的颜色样式
    //anchor: "AutoDefault",
    isSource: true,    //是否可以拖动（作为连线起点）
    connector: ["Straight", { stub: [0, 0], gap: 10, cornerRadius: 5, alwaysRespectStubs: true }],  //连接线的样式种类有[Bezier],[Flowchart],[StateMachine ],[Straight ]
    isTarget: true,    //是否可以放置（连线终点）
    maxConnections: -1,    // 设置连接点最多可以连接几条线
    connectorOverlays: [["Arrow", { width: 10, length: 10, location: 1 }]]
};

//页面初始化完成之后
$(function () {
    //连线样式下拉框的change事件
    $("#sel_linetype").change(function () {
        var strlinetype = "";
        var strlinecolor = "";
        //设置新添加元素的节点的连线样式
        //直线的样式和样色
        if ($(this).val() == "1") {
            strlinetype = "Flowchart";
            strlinecolor = "red";
            hollowCircle.connector = ["Flowchart", { stub: [0, 0], gap: 10, cornerRadius: 5, alwaysRespectStubs: true }];
        }
        //折线的样式和颜色
        else if ($(this).val() == "2") {
            strlinetype = "Straight";
            strlinecolor = "green";
            hollowCircle.connector = ["Straight", { stub: [0, 0], gap: 10, cornerRadius: 5, alwaysRespectStubs: true }];
        }
        //曲线的样式和颜色
        else if ($(this).val() == "3") {
            strlinetype = "Bezier";
            strlinecolor = "orange";
            hollowCircle.connector = ["Bezier", { stub: [0, 0], gap: 10, cornerRadius: 5, alwaysRespectStubs: true }];
        }
        //设置已经存在的所有的连接点的连线样式
        var arrnode = $("#divCenter").find(".node");
        for (var i = 0; i < arrnode.length; i++) {
            var arrendpoints = jsPlumb.getEndpoints($(arrnode[i]).attr("id"));
            if (arrendpoints == undefined || arrendpoints == null) {
                return;
            }
            var oconnector = arrendpoints[0].connector;
            if (oconnector == null || oconnector == undefined) {
                return;
            }
            oconnector[0] = strlinetype;
            var oconnectstyle = arrendpoints[0].connectorStyle;
            if (oconnectstyle == null || oconnectstyle == undefined) {
                return;
            }
            oconnectstyle.strokeStyle = strlinecolor;
        }
    });
});

其实也就几行代码，设置已经存在和将要拖动到界面上面的端点的连线样式。

二、全选、全选拖动效果代码示例

 可以选中元素，批量拖动元素和连线，大概效果：

看看实现代码：

1、初始化的时候注册可选中

$(function () {
    var oRegionSelect = new RegionSelect({
        region: '#divCenter div.node',
        selectedClass: 'seled',
        parentId: "divCenter"
    });
    oRegionSelect.select();
});

 2、选中相关方法

var _selectedRegions = [];
//var selProp;

function RegionSelect(selRegionProp) {
    //selProp = selRegionProp;
    this.regions = [];
    this.selProp = selRegionProp;
    this.InitRegions(selRegionProp);
    this.selectedClass = selRegionProp["selectedClass"];
    this.selectedRegion = [];
    this.selectDiv = null;
    this.startX = null;
    this.startY = null;
    this.parentId = selRegionProp["parentId"];
}

RegionSelect.prototype.InitRegions = function () {
    var _self = this;
    _self.regions = [];
    var _regions = document.getElementsBySelector(_self.selProp["region"]);//$("#divCenter > .node");//

    var bSelect = true;
    if (_regions && _regions.length > 0) {
        for (var i = 0; i < _regions.length; i++) {
            _regions[i].onmousedown = function () {
                bSelect = false;
                var evt = window.event || arguments[0];
                if (!evt.shiftKey && !evt.ctrlKey) {
                    if ($.inArray(this, _selectedRegions) === -1) {
                        // 清空所有select样式
                        _self.clearSelections(_regions);
                        this.className += " " + _self.selectedClass;
                        // 清空selected数组，并加入当前select中的元素
                        _selectedRegions = [];
                        _selectedRegions.push(this);
                    }
                } else {
                    if (this.className.indexOf(_self.selectedClass) == -1) {
                        this.className += " " + _self.selectedClass;
                        _selectedRegions.push(this);
                    } else {
                        this.className = this.className.replaceAll(_self.selectedClass, "");
                        _selectedRegions.remove(this);
                    }
                }
                clearEventBubble(evt);
            }
            this.regions.push(_regions[i]);
        }
    }

    if (bSelect) {
        // 清空所有select样式
        _self.clearSelections(_regions);
        // 清空selected数组，并加入当前select中的元素
        _selectedRegions = [];
    }
}

RegionSelect.prototype.select = function () {
    var _self = this;
    var sDivId = _self.parentId;
    var intMousePosition = [0, 0];
    var intOriginalPosition = [0, 0];
    var parentWidth = parseInt(document.getElementById(sDivId).parentElement.offsetWidth);
    var parentHeight = parseInt(document.getElementById(sDivId).parentElement.offsetHeight);
    addEvent("mousedown", function () {
        var evt = window.event || arguments[0];
        var buttonType = evt.buttons || evt.button;
        if (evt.target != undefined) {
            if (evt.target.id !== sDivId) return;
        }
        if (evt.srcElement != undefined) {
            if (evt.srcElement.id !== sDivId) return;
        }
        if (evt.buttons == undefined && buttonType == 0){
            _self.onBeforeSelect(evt, sDivId);
        }
        if (buttonType === 1) {
            _self.onBeforeSelect(evt, sDivId);
        }
        if (buttonType === 2) {
            intMousePosition = [evt.clientX, evt.clientY];
            var movX = parseInt(GetStyle(document.getElementById(sDivId), "left"));
            var movY = parseInt(GetStyle(document.getElementById(sDivId), "top"));
            intOriginalPosition = [movX, movY];
            document.getElementById(sDivId).style.cursor = "move";
        }
        clearEventBubble(evt);
    }, document);

    addEvent("mousemove", function () {
        var evt = window.event || arguments[0];
        //if (evt.target.id !== sDivId) return;
        var buttonType = evt.buttons || evt.button;
        if (evt.buttons == undefined && buttonType == 0) {
            _self.onSelect(evt, sDivId);
        }
        if (buttonType === 1) {
            _self.onSelect(evt, sDivId);
        }
        if (buttonType === 2) {
            var newX = intOriginalPosition[0] + evt.clientX - intMousePosition[0];
            var newY = intOriginalPosition[1] + evt.clientY - intMousePosition[1];
            if (newX >= 0) {
                newX = 0;
            }
            if (newY >= 0) {
                newY = 0;
            }
            $("#" + sDivId).css("left", newX + "px");
            $("#" + sDivId).css("top", newY + "px");
            $("#" + sDivId).css("width", (parentWidth-newX) + "px");
            $("#" + sDivId).css("height", (parentHeight-newY) + "px");

        }
        clearEventBubble(evt);
    }, document);

    addEvent("mouseup", function () {
        var evt = window.event || arguments[0];
        var buttonType = evt.buttons || evt.button;
        if (evt.buttons == undefined && buttonType == 0) {
        }
        if (buttonType === 1) {
        }
            document.getElementById(sDivId).style.cursor = "default";
            _self.onEnd();
    }, document);
}

RegionSelect.prototype.onBeforeSelect = function (evt, sDivId) {
    // 创建模拟 选择框
    var _self = this;
    _self.InitRegions(_self.selProp);
    if (!document.getElementById("selContainer")) {
        this.selectDiv = document.createElement("div");
        this.selectDiv.style.cssText = "position:absolute;width:0px;height:0px;font-size:0px;margin:0px;padding:0px;border:1px dashed #0099FF;background-color:#C3D5ED;z-index:1000;filter:alpha(opacity:60);opacity:0.6;display:none;";
        this.selectDiv.id = "selContainer";
        document.getElementById(sDivId).appendChild(this.selectDiv);
    } else {
        this.selectDiv = document.getElementById("selContainer");
    }

    this.startX = posXY(evt, sDivId).x;
    this.startY = posXY(evt, sDivId).y;
    this.isSelect = true;

}

RegionSelect.prototype.onSelect = function (evt, sDivId) {
    var self = this;
    if (self.isSelect) {
        if (self.selectDiv.style.display == "none") self.selectDiv.style.display = "";

        var posX = posXY(evt, sDivId).x;
        var poxY = posXY(evt, sDivId).y;
        self.selectDiv.style.left = Math.min(posX, this.startX) + "px";
        self.selectDiv.style.top = Math.min(poxY, this.startY) + "px";
        self.selectDiv.style.width = Math.abs(posX - this.startX) + "px";
        self.selectDiv.style.height = Math.abs(poxY - this.startY) + "px";

        var regionList = self.regions;
        for (var i = 0; i < regionList.length; i++) {
            if (self.selectDiv.parentNode.id !== regionList[i].parentNode.id) continue;
            var r = regionList[i], sr = self.innerRegion(self.selectDiv, r);
            if (sr && r.className.indexOf(self.selectedClass) == -1) {
                r.className = r.className + " " + self.selectedClass;
                _selectedRegions.push(r);
            } else if (!sr && r.className.indexOf(self.selectedClass) != -1) {
                r.className = r.className.replaceAll(self.selectedClass, "");
                _selectedRegions.remove(r);
            }

        }
    }
}

RegionSelect.prototype.onEnd = function () {
    var self = this;
    if (self.selectDiv) {
        self.selectDiv.style.display = "none";
    }
    this.isSelect = false;
    //_selectedRegions = this.selectedRegion;
}

// 判断一个区域是否在选择区内
RegionSelect.prototype.innerRegion = function (selDiv, region) {
    var s_top = parseInt(selDiv.style.top);
    var s_left = parseInt(selDiv.style.left);
    var s_right = s_left + parseInt(selDiv.offsetWidth);
    var s_bottom = s_top + parseInt(selDiv.offsetHeight);

    var r_top = parseInt(region.offsetTop);
    var r_left = parseInt(region.offsetLeft);
    var r_right = r_left + parseInt(region.offsetWidth);
    var r_bottom = r_top + parseInt(region.offsetHeight);

    var t = Math.max(s_top, r_top);
    var r = Math.min(s_right, r_right);
    var b = Math.min(s_bottom, r_bottom);
    var l = Math.max(s_left, r_left);

    if (b > t + 5 && r > l + 5) {
        return region;
    } else {
        return null;
    }

}

RegionSelect.prototype.clearSelections = function (regions) {
    for (var i = 0; i < regions.length; i++) {
        regions[i].className = regions[i].className.replaceAll(this.selectedClass, "");
    }
}

function getSelectedRegions() {
    return _selectedRegions;
}

/*-------------------------------------- 区域选择方法结束 --------------------------------------------*/

function showSelDiv() {
    var selInfo = "";
    var arr = getSelectedRegions();
    for (var i = 0; i < arr.length; i++) {
        selInfo += arr[i].innerHTML + "\n";
    }

    alert("共选择 " + arr.length + " 个文件，分别是：\n" + selInfo);

}

function MoveSelectDiv(event, ui,id) {
    var arr = getSelectedRegions();
    var iMoveLeft = ui.position.left - ui.originalPosition.left;
    var iMoveTop = ui.position.top - ui.originalPosition.top;

    for (var i = 0; i < arr.length; i++) {
        //if (arr[i].id === id) continue;

        if (arr[i].parentNode.id !== document.getElementById(id).parentNode.id) continue;
        var iLeft = parseInt($(arr[i]).attr("bLeft"));
        var iTop = parseInt($(arr[i]).attr("bTop"));
        $(arr[i]).css("left", (iLeft + iMoveLeft) + "px");
        $(arr[i]).css("top", (iTop + iMoveTop) + "px");
    }
}

function startMove() {
    var arr = getSelectedRegions();
    for (var i = 0; i < arr.length; i++) {
        $(arr[i]).attr("bLeft", $(arr[i]).position().left);
        $(arr[i]).attr("bTop", $(arr[i]).position().top);
    }
}

三、对齐、旋转代码示例

//左对齐
function SelectAlignLeft() {
    var arr = getSelectedRegions();
    var iLeft = 0;
    var id = "";

    for (var i = 0; i < arr.length; i++) {
        if (id === "") id = arr[i].parentNode.id;
        if (id !== arr[i].parentNode.id) continue;
        if ($(arr[i]).position().left<iLeft||iLeft===0) {
            iLeft = $(arr[i]).position().left;
        }
    }

    for (var j = 0; j < arr.length; j++) {
        if (id !== arr[j].parentNode.id) continue;
        $(arr[j]).css("left", iLeft + "px");
    }

    jsPlumb.repaintEverything();
}

//居中对齐
function SelectAlignCenter() {
    var arr = getSelectedRegions();
    var iLeft = 0;
    var id = "";

    for (var i = 0; i < arr.length; i++) {
        if (id === "") id = arr[i].parentNode.id;
        if (id !== arr[i].parentNode.id) continue;
        if ($(arr[i]).position().left < iLeft || iLeft === 0) {
            iLeft = $(arr[i]).position().left + parseInt(GetStyle(arr[i],"width")) / 2;
        }
    }

    for (var j = 0; j < arr.length; j++) {
        if (id !== arr[j].parentNode.id) continue;
        $(arr[j]).css("left", (iLeft - parseInt(GetStyle(arr[j],"width")) / 2) + "px");
    }

    jsPlumb.repaintEverything();
}
//右对齐
function SelectAlignRight() {
    var arr = getSelectedRegions();
    var iLeft = 0;
    var id = "";

    for (var i = 0; i < arr.length; i++) {
        if (id === "") id = arr[i].parentNode.id;
        if (id !== arr[i].parentNode.id) continue;
        if ($(arr[i]).position().left + parseInt(GetStyle(arr[i], "width")) > iLeft || iLeft === 0) {
            iLeft = $(arr[i]).position().left + parseInt(GetStyle(arr[i], "width"));
        }
    }

    for (var j = 0; j < arr.length; j++) {
        if (id !== arr[j].parentNode.id) continue;
        $(arr[j]).css("left", (iLeft - parseInt(GetStyle(arr[j], "width"))) + "px");
    }

    jsPlumb.repaintEverything();
}

//上对齐
function SelectAlignTop() {
    var arr = getSelectedRegions();
    var iTop = 0;
    var id = "";

    for (var i = 0; i < arr.length; i++) {
        if (id === "") id = arr[i].parentNode.id;
        if (id !== arr[i].parentNode.id) continue;
        if ($(arr[i]).position().top < iTop || iTop === 0) {
            iTop = $(arr[i]).position().top;
        }
    }

    for (var j = 0; j < arr.length; j++) {
        if (id !== arr[j].parentNode.id) continue;
        $(arr[j]).css("top", iTop + "px");
    }

    jsPlumb.repaintEverything();
}

//垂直居中
function SelectAlignMiddle() {
    var arr = getSelectedRegions();
    var iTop = 0;
    var id = "";

    for (var i = 0; i < arr.length; i++) {
        if (id === "") id = arr[i].parentNode.id;
        if (id !== arr[i].parentNode.id) continue;
        if ($(arr[i]).position().top + parseInt(GetStyle(arr[i], "height")) / 2 < iTop || iTop === 0) {
            iTop = $(arr[i]).position().top + parseInt(GetStyle(arr[i], "height")) / 2;
        }
    }

    for (var j = 0; j < arr.length; j++) {
        if (id !== arr[j].parentNode.id) continue;
        $(arr[j]).css("top", (iTop - parseInt(GetStyle(arr[j], "height")) / 2) + "px");
    }

    jsPlumb.repaintEverything();
}

//下对齐
function SelectAlignBottom() {
    var arr = getSelectedRegions();
    var iTop = 0;
    var id = "";

    for (var i = 0; i < arr.length; i++) {
        if (id === "") id = arr[i].parentNode.id;
        if (id !== arr[i].parentNode.id) continue;
        if ($(arr[i]).position().top + parseInt(GetStyle(arr[i], "height")) > iTop || iTop === 0) {
            iTop = $(arr[i]).position().top + parseInt(GetStyle(arr[i], "height"));
        }
    }

    for (var j = 0; j < arr.length; j++) {
        if (id !== arr[j].parentNode.id) continue;
        $(arr[j]).css("top", (iTop - parseInt(GetStyle(arr[j], "height"))) + "px");
    }

    jsPlumb.repaintEverything();
}

//上下靠拢
function SelectUpColse() {
    var arr = getSelectedRegions();
    var iTop = 0;
    var id = "";
    for (var i = 0; i < arr.length; i++) {
        if (id === "") id = arr[i].parentNode.id;
        if (id !== arr[i].parentNode.id) continue;
        if (iTop === 0) iTop = $(arr[i]).position().top;
        $(arr[i]).css("top", iTop + "px");
        iTop += parseInt(GetStyle(arr[i], "height"));
    }

    jsPlumb.repaintEverything();
}

//左右靠拢
function SelectLeftColse() {
    var arr = getSelectedRegions();
    var iLeft = 0;
    var id = "";
    for (var i = 0; i < arr.length; i++) {
        if (id === "") id = arr[i].parentNode.id;
        if (id !== arr[i].parentNode.id) continue;
        if (iLeft === 0) iLeft = $(arr[i]).position().left;
        $(arr[i]).css("left", iLeft + "px");
        iLeft += parseInt(GetStyle(arr[i], "width"));
    }

    jsPlumb.repaintEverything();

}


//同高
function SelectSameHeight() {
    var arr = getSelectedRegions();
    var iHeigth = 0;
    var id = "";
    for (var i = 0; i < arr.length; i++) {
        if (id === "") id = arr[i].parentNode.id;
        if (id !== arr[i].parentNode.id) continue;
        if (iHeigth === 0) iHeigth = parseInt(GetStyle(arr[i], "height"));
        $(arr[i]).css("height", iHeigth+"px");
    }

    jsPlumb.repaintEverything();
}


//同宽
function SelectSameWidth() {
    var arr = getSelectedRegions();
    var iWidth = 0;
    var id = "";
    for (var i = 0; i < arr.length; i++) {
        if (id === "") id = arr[i].parentNode.id;
        if (id !== arr[i].parentNode.id) continue;
        if (iWidth === 0) iWidth = parseInt(GetStyle(arr[i], "width"));
        $(arr[i]).css("width", iWidth + "px");
    }

    jsPlumb.repaintEverything();

}


//旋转
function SelectClockwise(index) {
    var arr = getSelectedRegions();
    //var iWidth = 0;
    //var id = "";
    for (var i = 0; i < arr.length; i++) {
        //if (id === "") id = arr[i].parentNode.id;
        //if (id !== arr[i].parentNode.id) continue;
        var sIndex= arr[i].style.transform.replace("rotate(", "").replace("deg)", "");
        var iNum = 0;
        if (sIndex) iNum = parseInt(sIndex);
        $(arr[i]).css("transform", "rotate(" + (iNum + index)%360 + "deg)");

        var points = jsPlumb.getEndpoints(arr[i]);
    }

    jsPlumb.repaintEverything();

}
//删除选中
function DeleteSelect() {
    var arr = getSelectedRegions();
    for (var i = 0; i < arr.length; i++) {
        jsPlumb.remove(arr[i],true);
        //var points = jsPlumb.getEndpoints(arr[i]);
        //for (var j = 0; j < points.length; j++) {
        //    jsPlumb.deleteEndpoint(points[j]);
        //}
        //arr[i].parentNode.removeChild(arr[i]);
        }

    jsPlumb.repaintEverything();

}

function GetStyle(obj, attr) {
    if (obj.currentStyle) {
        return obj.currentStyle[attr];  //只适用于IE
    }
    else {
        return getComputedStyle(obj, false)[attr];   //只适用于FF,Chrome,Safa
    }
    return obj.style[attr]; //本人测试在IE和FF下没有用,chrome有用
}

 

代码可能有点乱，待整理。上章有博友就找我要过源码，这次出来一个初级的版本，还是把源码贴出来。有兴趣可以看看。源码下载