我正在处理一个查询构建器项目。我正在尝试使用d3.js构建一个查询生成器。我被困在一个部分,我想在转换组中移动某些元素。这是repo,我被困在function中。我希望在连接后移动操作员并更新连接的线路。谁能帮我?
var circleDrag = d3.behavior.drag()
.on('dragstart', function () {
d3.event.sourceEvent.stopPropagation();
})
.on('drag', function () {
var parentQboxGroupId = d3.select(this).select(function () {
return this.parentNode;
});
var grandParent = parentQboxGroupId.select(function(){
return this.parentNode;
});
var drawingGroup = d3.select('#'+grandParent.attr('id'));
var currentC = d3.select(this);
dragging = true;
drawingGroup
.select('.lineInsideQbox')
.attr('x1', currentC.attr('cx'))
.attr('y1', currentC.attr('cy'))
.style('stroke','green')
.style('stroke-width','2px');
dummyLine.src = currentC.attr('id');
console.log('CIRCLE IS BEING DRAGGED' + JSON.stringify(dummyLine));
})
.on('dragend', function () {
console.log('drag circle end');
//if(!selectedCircle.id){
// dummyLine.target = selectedQbox.id;
//}
dummyLine.target = selectedCircle.id;
dragging = false;
console.log('DRAG END : SELCTED NODE : '+ JSON.stringify(selectedCircle));
console.log('DRAG END : DUMMY LINE : '+ JSON.stringify(dummyLine));
var targetNode = d3.select('#'+dummyLine.target);
var srcNode = d3.select('#'+dummyLine.src);
console.log('split : ' + dummyLine.src.split('--'));
var group = '#' + (dummyLine.src).split('--')[1];
console.log('G: ' + group);
d3.select(group).append('line')
.attr('id', function () {
var a = (dummyLine.src).split('--');
var b = (dummyLine.target).split('--');
if( a[0]== 'nodeRight'){
return dummyLine.src + '__' + dummyLine.target;
}else{
return dummyLine.target + '__' + dummyLine.src;
}
})
.attr('class', function () {
var a = (dummyLine.src).split('--');
var b = (dummyLine.target).split('--');
return 'line '+ a[1]+' '+b[1];
})
.attr('x1', srcNode.attr('cx'))
.attr('y1',srcNode.attr('cy'))
.attr('x2',targetNode.attr('cx'))
.attr('y2',targetNode.attr('cy'))
.style('stroke', 'black')
.style('stroke-width', '3px')
;
dummyLine.src = null;
dummyLine.target = null;
});
编辑:当我尝试删除查询框时。我可以放弃其他运营商。然后我应该能够在里面连接它们。这是显示我正在尝试的图像。
连接完成后,我试着移动大盒子和盒子。小型运营商个别。这就是代码中断的地方。
答案 0 :(得分:1)
主要问题是,要移动运算符,您可以使用translate来移动整个组(标记),其中包括图像,两个圆和线。然后使用其连接的另一个运算符的CX,CY值设置该行的另一端。 这不起作用,因为在执行平移时圆的CX和CY值不会更新,因此在第二次移动时,它会将x,y值放在圆的原始点,而不是移动点。 要解决而不是翻译整个组,只翻译图像,更新圆圈的cx和cy值,然后用圆圈的新cx,cy更新线x,y值:
所需的所有修改都在您的operatorDrag.js文件中。 首先,当您附加圆圈时,添加一个包含原始cx和cy值的属性。在拖动运算符时计算新的cx,cy时我们需要这些:
从此改变:
var op = currGroup
.append('image')
.attr('class', 'operator')
.attr('width', elem.attr('width') * 0.75)
.attr('height', elem.attr('height') * 0.75)
.attr('x', d3.mouse(this)[0])
.attr('y', d3.mouse(this)[1])
.attr('xlink:href', elem.attr('href'));
currGroup
.append('circle')
.attr('class', 'node nodeLeft')
.attr('id', function () {
return 'nodeLeft--' + currGroup.attr('id');
})
.attr('cx', op.attr('x'))
.attr('cy', op.attr('height') / 2 + Number(op.attr('y')))
.attr('r', 5)
.style('fill', 'red')
.on('mouseover', function () {
selectedCircle = {
id: d3.select(this).attr('id'),
cls: 'nodeLeft'
}
})
.call(circleDrag)
;
currGroup
.append('circle')
.attr('class', 'node nodeRight')
.attr('id', function () {
return 'nodeRight--' + currGroup.attr('id');
})
.attr('cx', Number(op.attr('x')) + Number(op.attr('width')))
.attr('cy', op.attr('height') / 2 + Number(op.attr('y')))
.attr('r', 5)
.style('fill', 'red')
.on('mouseover', function () {
selectedCircle = {
id: d3.select(this).attr('id'),
cls: 'nodeRight'
}
})
.call(circleDrag)
;
对此(更新的代码包含在以#SB开头的注释中):
var op = currGroup
.append('image')
.attr('class', 'operator')
.attr('width', elem.attr('width') * 0.75)
.attr('height', elem.attr('height') * 0.75)
.attr('x', d3.mouse(this)[0])
.attr('y', d3.mouse(this)[1])
.attr('xlink:href', elem.attr('href'));
currGroup
.append('circle')
.attr('class', 'node nodeLeft')
.attr('id', function () {
return 'nodeLeft--' + currGroup.attr('id');
})
.attr('cx', op.attr('x'))
.attr('cy', op.attr('height') / 2 + Number(op.attr('y')))
// #SB: add a reference to the original cx and cy position.
// we will need it to set new cx cy when moving operator
.attr('data-cx', op.attr('x'))
.attr('data-cy', op.attr('height') / 2 + Number(op.attr('y')))
//----------------------------------------------------------------------
.attr('r', 5)
.style('fill', 'red')
.on('mouseover', function () {
selectedCircle = {
id: d3.select(this).attr('id'),
cls: 'nodeLeft'
}
})
.call(circleDrag)
;
currGroup
.append('circle')
.attr('class', 'node nodeRight')
.attr('id', function () {
return 'nodeRight--' + currGroup.attr('id');
})
.attr('cx', Number(op.attr('x')) + Number(op.attr('width')))
.attr('cy', op.attr('height') / 2 + Number(op.attr('y')))
// #SB: add a reference to the original cx and cy position.
// we will need it to set new cx cy when moving operator
.attr('data-cx', Number(op.attr('x')) + Number(op.attr('width')))
.attr('data-cy', op.attr('height') / 2 + Number(op.attr('y')))
//----------------------------------------------------------------------
.attr('r', 5)
.style('fill', 'red')
.on('mouseover', function () {
selectedCircle = {
id: d3.select(this).attr('id'),
cls: 'nodeRight'
}
})
.call(circleDrag)
;
完成此操作后,请转到运营商的on drag方法。这是我们要改变的代码:
.on('drag', function () {
var g = d3.select(this);
var currentOp = g.select('.operator');
var parent = g.select(function () {
return this.parentNode;
}).select('.qbox');
var dx = d3.event.x;
var dy = d3.event.y;
var mouse = {dx: d3.event.x, dy: d3.event.y};
var currentObj = {
x: currentOp.attr('x'),
y: currentOp.attr('y'),
width: currentOp.attr('width'),
height: currentOp.attr('height')
};
var parentObj = {
x: parent.attr('x'),
y: parent.attr('y'),
width: parent.attr('width'),
height: parent.attr('height')
};
//console.log('parent width : ' + parent.attr('width'));
//console.log('parent width : ' + currentOp.attr('width'));
//g.attr('transform', 'translate(' + x + ',' + y + ')');
var loc = getXY(mouse, currentObj, parentObj);
g.attr('transform', 'translate(' + loc.x + ',' + loc.y + ')');
d3.select('#' + g.attr('id')).selectAll('.line')[0].forEach(function (e1) {
var line = d3.select(e1);
console.log('-------------------');
console.log('line : ' + line.attr('id'));
console.log('-------------------');
var split = line.attr('id').split('__');
if(g.attr('id') == split[0]){
//change x2, y2
var otherNode = d3.select('#'+split[1]);
line.attr('x2', otherNode.attr('cx'));
line.attr('y2', otherNode.attr('cy'));
}else{
var otherNode = d3.select('#'+split[0]);
line.attr('x1', otherNode.attr('cx'));
line.attr('y1', otherNode.attr('cy'));
}
})
}))
首先,不要翻译整个对象,只翻译图片:
var g = d3.select(this);
var currentOp = g.select('.operator');
var parent = g.select(function () {
return this.parentNode;
}).select('.qbox');
//#SB: added a reference to the parent id
var parent_id = g.select(function () {
return this.parentNode;
}).attr('id');
//---------------------------------------
var dx = d3.event.x;
var dy = d3.event.y;
var mouse = {dx: d3.event.x, dy: d3.event.y};
var currentObj = {
x: currentOp.attr('x'),
y: currentOp.attr('y'),
width: currentOp.attr('width'),
height: currentOp.attr('height')
};
var parentObj = {
x: parent.attr('x'),
y: parent.attr('y'),
width: parent.attr('width'),
height: parent.attr('height')
};
var loc = getXY(mouse, currentObj, parentObj);
//#SB: Do not translate everything, the cx, cy values of the circle are not updated
// when translating which will make future moves calculate incorrectly
g.selectAll('image').attr('transform', 'translate(' + loc.x + ',' + loc.y + ')');
然后,不是翻译圆圈,而是使用原始cx,cy和translate值更改它们的cx和cy值:
g.selectAll('circle')
.attr('cx', function () {
return parseFloat(d3.select(this).attr('data-cx')) + parseFloat(loc.x);
})
.attr('cy', function () {
return parseFloat(d3.select(this).attr('data-cy')) + parseFloat(loc.y);
});
最后一件事是对行的更新。在原始代码中,您选择了运算符组中的所有行,但实际上只会选择此组而忽略某些行。某些行可以是另一个运算符组的一部分,但可以连接到正在移动的运算符。 在这种情况下,我们应该选择父组中的所有行,并检查该行是否连接到我们正在移动的运算符。 如果已连接,则我们更新x和y值:
//#SB: Select all the lines in the parent group instead of only group of the
// operator we are moving. There can be lines that exists on other groups that
// do not exist within the group that is being moved.
d3.select('#' + parent_id).selectAll('.line')[0].forEach(function (el) {
var parent_id = g.attr('id')
var line = d3.select(el)
var nodeType = line.attr('id').split("__"); // id tells us if the line is connected to the left or right node
var operators = line.attr('class').split(" "); // class holds info on what operators the line is connected to
var sourceCircleId = nodeType[0].split("--")[0] + '--' + operators[1];
var targetCircleId = nodeType[1].split("--")[0] + '--' + operators[2];
if (parent_id == operators[1] || parent_id == operators[2]) { // the line is connected to the operator we are moving
line.attr('x1', d3.select('#' + sourceCircleId).attr('cx'))
line.attr('y1', d3.select('#' + sourceCircleId).attr('cy'))
line.attr('x2', d3.select('#' + targetCircleId).attr('cx'))
line.attr('y2', d3.select('#' + targetCircleId).attr('cy'))
}
});
完成OnDrag代码:
.on('drag', function () {
var g = d3.select(this);
var currentOp = g.select('.operator');
var parent = g.select(function () {
return this.parentNode;
}).select('.qbox');
//#SB: added a reference to the parent id
var parent_id = g.select(function () {
return this.parentNode;
}).attr('id');
//---------------------------------------
var dx = d3.event.x;
var dy = d3.event.y;
var mouse = {dx: d3.event.x, dy: d3.event.y};
var currentObj = {
x: currentOp.attr('x'),
y: currentOp.attr('y'),
width: currentOp.attr('width'),
height: currentOp.attr('height')
};
var parentObj = {
x: parent.attr('x'),
y: parent.attr('y'),
width: parent.attr('width'),
height: parent.attr('height')
};
var loc = getXY(mouse, currentObj, parentObj);
//#SB: Do not translate everything, the cx, cy values of the circle are not updated
// when translating which will make future moves calculate incorrectly
g.selectAll('image').attr('transform', 'translate(' + loc.x + ',' + loc.y + ')');
g.selectAll('circle')
.attr('cx', function () {
return parseFloat(d3.select(this).attr('data-cx')) + parseFloat(loc.x);
})
.attr('cy', function () {
return parseFloat(d3.select(this).attr('data-cy')) + parseFloat(loc.y);
});
//#SB: Select all the lines in the parent group instead of only group of the
// operator we are moving. There can be lines that exists on other groups that
// do not exist within the group that is being moved.
d3.select('#' + parent_id).selectAll('.line')[0].forEach(function (el) {
var parent_id = g.attr('id')
var line = d3.select(el)
var nodeType = line.attr('id').split("__"); // id tells us if the line is connected to the left or right node
var operators = line.attr('class').split(" "); // class holds info on what operators the line is connected to
var sourceCircleId = nodeType[0].split("--")[0] + '--' + operators[1];
var targetCircleId = nodeType[1].split("--")[0] + '--' + operators[2];
if (parent_id == operators[1] || parent_id == operators[2]) { // the line is connected to the operator we are moving
line.attr('x1', d3.select('#' + sourceCircleId).attr('cx'))
line.attr('y1', d3.select('#' + sourceCircleId).attr('cy'))
line.attr('x2', d3.select('#' + targetCircleId).attr('cx'))
line.attr('y2', d3.select('#' + targetCircleId).attr('cy'))
}
});
}))