JS組件系列——JsPlumb流程圖及相關效果詳解（二：附源碼）

前言：上篇JS組件系列——JsPlumb流程圖及相關效果詳解介紹了下JsPlumb在瀏覽器里面畫流程圖的效果展示，以及簡單的JsPlumb代碼示例。這篇還是接着來看看各個效果的代碼說明。

一、設置連線的樣式和顏色效果代碼示例

大概的效果如圖：

這些效果看着很簡單，那么，我們如何用代碼去實現它呢。上章我們說過，JsPlumb的連線樣式是由點的某些屬性決定的，既然如此，我們就通過設置點的樣式來動態改變連線的樣式即可。來看代碼：

首先來看看連線類型的那個select

 <div id="btn_linetype" class="divMenuBtn btn-default btn">
    連線類型：
　　<select id="sel_linetype" style="width:80px;height:20px">
　　　　<option value="2">直線</option>
　　　　<option value="1">折線</option>
　　　　<option value="3">曲線</option>
　　</select>
</div>

在頁面初始化的時候注冊select的change事件

//全局的空心圓端點樣式設置
var hollowCircle = {
    DragOptions: { cursor: 'pointer', zIndex: 2000 },
    endpoint: ["Dot", { radius: 7 }],  //端點的形狀
    connectorStyle: connectorPaintStyle,//連接線的顏色，大小樣式
    connectorHoverStyle: connectorHoverStyle,
    paintStyle: {
        strokeStyle: "#1e8151",
        fillStyle: "transparent",
        radius: 5,
        lineWidth: 2
    },        //端點的顏色樣式
    //anchor: "AutoDefault",
    isSource: true,    //是否可以拖動（作為連線起點）
    connector: ["Straight", { stub: [0, 0], gap: 10, cornerRadius: 5, alwaysRespectStubs: true }],  //連接線的樣式種類有[Bezier],[Flowchart],[StateMachine ],[Straight ]
    isTarget: true,    //是否可以放置（連線終點）
    maxConnections: -1,    // 設置連接點最多可以連接幾條線
    connectorOverlays: [["Arrow", { width: 10, length: 10, location: 1 }]]
};

//頁面初始化完成之后
$(function () {
    //連線樣式下拉框的change事件
    $("#sel_linetype").change(function () {
        var strlinetype = "";
        var strlinecolor = "";
        //設置新添加元素的節點的連線樣式
        //直線的樣式和樣色
        if ($(this).val() == "1") {
            strlinetype = "Flowchart";
            strlinecolor = "red";
            hollowCircle.connector = ["Flowchart", { stub: [0, 0], gap: 10, cornerRadius: 5, alwaysRespectStubs: true }];
        }
        //折線的樣式和顏色
        else if ($(this).val() == "2") {
            strlinetype = "Straight";
            strlinecolor = "green";
            hollowCircle.connector = ["Straight", { stub: [0, 0], gap: 10, cornerRadius: 5, alwaysRespectStubs: true }];
        }
        //曲線的樣式和顏色
        else if ($(this).val() == "3") {
            strlinetype = "Bezier";
            strlinecolor = "orange";
            hollowCircle.connector = ["Bezier", { stub: [0, 0], gap: 10, cornerRadius: 5, alwaysRespectStubs: true }];
        }
        //設置已經存在的所有的連接點的連線樣式
        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;
        }
    });
});

其實也就幾行代碼，設置已經存在和將要拖動到界面上面的端點的連線樣式。

二、全選、全選拖動效果代碼示例

 可以選中元素，批量拖動元素和連線，大概效果：

看看實現代碼：

1、初始化的時候注冊可選中

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

 2、選中相關方法

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樣式
                        _self.clearSelections(_regions);
                        this.className += " " + _self.selectedClass;
                        // 清空selected數組，並加入當前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樣式
        _self.clearSelections(_regions);
        // 清空selected數組，並加入當前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) {
    // 創建模擬 選擇框
    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;
}

// 判斷一個區域是否在選擇區內
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;
}

/*-------------------------------------- 區域選擇方法結束 --------------------------------------------*/

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

    alert("共選擇 " + arr.length + " 個文件，分別是：\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、對齊、旋轉代碼示例

//左對齊
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();
}

//居中對齊
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();
}
//右對齊
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();
}

//上對齊
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();
}

//下對齊
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();
}

//上下靠攏
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();
}

//左右靠攏
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();
}


//同寬
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();

}


//旋轉
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();

}
//刪除選中
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];  //只適用於IE
    }
    else {
        return getComputedStyle(obj, false)[attr];   //只適用於FF,Chrome,Safa
    }
    return obj.style[attr]; //本人測試在IE和FF下沒有用,chrome有用
}

 

代碼可能有點亂，待整理。上章有博友就找我要過源碼，這次出來一個初級的版本，還是把源碼貼出來。有興趣可以看看。源碼下載