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https://github.com/UnickSoft/graphonline.git
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390 lines
14 KiB
JavaScript
390 lines
14 KiB
JavaScript
/**
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* Graph drawer.
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*/
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// Test graph: http://localhost:8080/?graph=IEktYqMyJaYYyLufZZcst_test
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function BaseEdgeDrawer(context, drawObjects)
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{
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if (drawObjects === undefined)
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{
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drawObjects = null;
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}
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this.context = context;
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this.drawObject = null;
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this.drawArc = null;
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this.startArrowDirection = null;
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this.finishArrowDirection = null;
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this.textCenterObject = null;
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this.getPointOnArc = null;
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if (drawObjects)
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{
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if (drawObjects.hasOwnProperty("drawObject"))
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this.drawObject = drawObjects.drawObject;
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if (drawObjects.hasOwnProperty("drawArc"))
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this.drawArc = drawObjects.drawArc;
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if (drawObjects.hasOwnProperty("startArrowDirection"))
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this.startArrowDirection = drawObjects.startArrowDirection;
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if (drawObjects.hasOwnProperty("finishArrowDirection"))
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this.finishArrowDirection = drawObjects.finishArrowDirection;
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if (drawObjects.hasOwnProperty("textCenterObject"))
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this.textCenterObject = drawObjects.textCenterObject;
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if (drawObjects.hasOwnProperty("getPointOnArc"))
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this.getPointOnArc = drawObjects.getPointOnArc;
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}
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}
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BaseEdgeDrawer.prototype.Draw = function(baseEdge, arcStyle)
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{
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if (this.drawObject && this.drawObject != this)
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{
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this.drawObject.Draw(baseEdge, arcStyle);
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return;
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}
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this.SetupStyle(baseEdge, arcStyle);
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var lengthArrow = Math.max(baseEdge.model.width * 4, 8);
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var widthArrow = Math.max(baseEdge.model.width * 2, 4);
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var position1 = baseEdge.vertex1.position;
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var position2 = baseEdge.vertex2.position;
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var direction = position1.subtract(position2);
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direction.normalize(1.0);
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var positions = baseEdge.GetEdgePositionsShift();
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var hasStartStyle = !position1.equals(position2) && baseEdge.GetStartEdgeStyle() != "";
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var hasFinishStyle = !position1.equals(position2) && baseEdge.GetFinishEdgeStyle() != "";
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var arcPos1 = positions[0];
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var arcPos2 = positions[1];
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if (hasStartStyle)
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{
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var dirArrow = this.GetStartArrowDirection(positions[0], positions[1], lengthArrow);
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arcPos1 = arcPos1.add(dirArrow.multiply(lengthArrow / 2));
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}
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if (hasFinishStyle)
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{
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var dirArrow = this.GetFinishArrowDirection(positions[0], positions[1], lengthArrow);
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arcPos2 = arcPos2.add(dirArrow.multiply(-lengthArrow / 2));
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}
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this.DrawArc (arcPos1, arcPos2, arcStyle);
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this.context.fillStyle = this.context.strokeStyle;
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this.context.lineWidth = 0;
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if (hasStartStyle)
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{
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this.DrawArrow(positions[0], this.GetStartArrowDirection(positions[0], positions[1], lengthArrow), lengthArrow, widthArrow);
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}
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if (hasFinishStyle)
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{
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this.DrawArrow(positions[1], this.GetFinishArrowDirection(positions[0], positions[1], lengthArrow), lengthArrow, widthArrow);
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}
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this.SetupStyle(baseEdge, arcStyle);
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if (arcStyle.weightPosition == WeightTextCenter)
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{
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if (baseEdge.GetText().length > 0)
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{
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this.DrawWeight(positions[0], positions[1], baseEdge.GetText(), arcStyle, false);
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}
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if (baseEdge.GetUpText().length > 0)
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{
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this.DrawUpText(positions[0], positions[1], baseEdge.GetUpText(), arcStyle, false, arcStyle.additionalTextColor,
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baseEdge.model.width / 2 + arcStyle.mainTextFontSize + 4, arcStyle.mainTextFontSize);
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}
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}
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else if (arcStyle.weightPosition == WeightTextUp)
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{
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if (baseEdge.GetText().length > 0)
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{
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this.DrawUpText(positions[0], positions[1], baseEdge.GetText(), arcStyle, false, arcStyle.weightText,
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baseEdge.model.width / 2 + arcStyle.mainTextFontSize / 2, arcStyle.mainTextFontSize);
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}
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if (baseEdge.GetUpText().length > 0)
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{
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this.DrawUpText(positions[0], positions[1], baseEdge.GetUpText(), arcStyle, false, arcStyle.additionalTextColor,
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- baseEdge.model.width / 2 - (arcStyle.mainTextFontSize / 2 + 4), arcStyle.mainTextFontSize);
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}
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}
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}
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BaseEdgeDrawer.prototype.SetupStyle = function(baseEdge, arcStyle)
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{
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this.context.lineWidth = baseEdge.model.width;
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this.context.strokeStyle = arcStyle.strokeStyle;
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this.context.fillStyle = arcStyle.fillStyle;
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this.model = baseEdge.model;
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this.style = arcStyle;
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}
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BaseEdgeDrawer.prototype.DrawArc = function(position1, position2, arcStyle)
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{
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if (this.drawArc && this.drawArc != this)
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{
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this.drawArc.DrawArc(position1, position2, arcStyle);
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return;
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}
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this.context.setLineDash(lineDashTypes[arcStyle.lineDash]);
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if (position1.equals(position2))
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{
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this.context.beginPath();
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this.context.arc(position1.x - Math.cos(this.model.GetLoopShiftAngel()) * this.model.GetLoopSize(),
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position1.y - Math.sin(this.model.GetLoopShiftAngel()) * this.model.GetLoopSize(), this.model.GetLoopSize(), 0, 2 * Math.PI);
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this.context.stroke();
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}
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else
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{
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this.context.beginPath();
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this.context.moveTo(position1.x, position1.y);
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this.context.lineTo(position2.x, position2.y);
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this.context.stroke();
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}
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this.context.setLineDash([]);
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}
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BaseEdgeDrawer.prototype.DrawWeight = function(position1, position2, text, arcStyle, hasPair)
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{
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var centerPoint = this.GetTextCenterPoint(position1, position2, hasPair, arcStyle);
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this.context.font = "bold " + arcStyle.mainTextFontSize + "px sans-serif";
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this.context.textBaseline = "middle";
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this.context.lineWidth = arcStyle.textStrokeWidth;
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this.context.fillStyle = arcStyle.fillStyle;
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var widthText = this.context.measureText(text).width;
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this.context.beginPath();
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this.context.rect(centerPoint.x - widthText / 2 - arcStyle.textPadding / 2,
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centerPoint.y - arcStyle.mainTextFontSize / 1.7 - arcStyle.textPadding / 2,
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widthText + arcStyle.textPadding, arcStyle.mainTextFontSize + arcStyle.textPadding);
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this.context.closePath();
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this.context.fill();
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this.context.stroke ();
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this.context.fillStyle = arcStyle.weightText;
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this.context.fillText(text, centerPoint.x - widthText / 2, centerPoint.y);
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}
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BaseEdgeDrawer.prototype.DrawUpText = function(position1, position2, text, arcStyle, hasPair, color, offset, fontSize)
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{
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var centerPoint = this.GetTextCenterPoint(position1, position2, hasPair, arcStyle);
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this.context.font = fontSize == null ? "bold " + (DefaultMainTextFontSizeEdge + TopTextFontSizeDeltaEdge) +
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"px sans-serif" : "bold " + (fontSize + TopTextFontSizeDeltaEdge) +
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"px sans-serif";
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this.context.textBaseline = "middle";
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var widthText = this.context.measureText(text).width;
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this.context.fillStyle = color;
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var vectorEdge = new Point(position2.x - position1.x, position2.y - position1.y);
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var angleRadians = Math.atan2(vectorEdge.y, vectorEdge.x);
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if (angleRadians > Math.PI / 2 || angleRadians < -Math.PI / 2)
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{
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vectorEdge = new Point(position1.x - position2.x, position1.y - position2.y);
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angleRadians = Math.atan2(vectorEdge.y, vectorEdge.x);
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}
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var normalize = vectorEdge.normal().normalizeCopy(offset);
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this.context.save();
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this.context.translate(centerPoint.x - normalize.x, centerPoint.y - normalize.y);
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this.context.rotate(angleRadians);
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this.context.textAlign = "center";
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this.context.fillText(text, 0, 0);
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this.context.restore();
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}
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BaseEdgeDrawer.prototype.DrawArrow = function(position, direction, length, width)
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{
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var normal = direction.normal();
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var pointOnLine = position.subtract(direction.multiply(length));
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var point1 = pointOnLine.add(normal.multiply(width));
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var point2 = pointOnLine.add(normal.multiply(-width));
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this.context.beginPath();
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this.context.moveTo(position.x, position.y);
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this.context.lineTo(point1.x, point1.y);
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this.context.lineTo(point2.x, point2.y);
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this.context.lineTo(position.x, position.y);
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this.context.closePath();
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this.context.fill();
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}
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BaseEdgeDrawer.prototype.GetStartArrowDirection = function(position1, position2, lengthArrow)
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{
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if (this.startArrowDirection && this.startArrowDirection != this)
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{
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return this.startArrowDirection.GetStartArrowDirection(position1, position2, lengthArrow);
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}
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var direction = position1.subtract(position2);
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direction.normalize(1.0);
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return direction;
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}
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BaseEdgeDrawer.prototype.GetFinishArrowDirection = function(position1, position2, lengthArrow)
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{
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if (this.finishArrowDirection && this.finishArrowDirection != this)
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{
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return this.finishArrowDirection.GetFinishArrowDirection(position1, position2, lengthArrow);
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}
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var direction = position2.subtract(position1);
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direction.normalize(1.0);
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return direction;
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}
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BaseEdgeDrawer.prototype.GetTextCenterPoint = function (position1, position2, hasPair, arcStyle)
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{
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if (this.textCenterObject && this.textCenterObject != this)
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{
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return this.textCenterObject.GetTextCenterPoint(position1, position2, hasPair, arcStyle);
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}
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var textShift = Math.min(12 / position1.subtract(position2).length(), 0.4);
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var centerPoint = Point.interpolate(position1, position2, 0.5);
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if (position1.equals(position2))
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{
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let sinVal = Math.sin(this.model.GetLoopShiftAngel());
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let cosVal = Math.cos(this.model.GetLoopShiftAngel());
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centerPoint.x = centerPoint.x - cosVal * this.model.GetLoopSize();
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centerPoint.y = centerPoint.y - (sinVal + Math.sign(sinVal) * 1.0) * this.model.GetLoopSize();
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}
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return centerPoint;
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}
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BaseEdgeDrawer.prototype.GetPointOnArc = function (position1, position2, percent)
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{
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if (this.getPointOnArc && this.getPointOnArc != this)
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{
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return this.getPointOnArc.GetPointOnArc(position1, position2, percent);
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}
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return Point.interpolate(position1, position2, percent);
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}
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function ProgressArcDrawer(context, baseDrawer, progress)
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{
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this.context = context;
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this.baseDrawer = baseDrawer;
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this.progress = progress;
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}
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ProgressArcDrawer.prototype = Object.create(BaseEdgeDrawer.prototype);
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ProgressArcDrawer.prototype.Draw = function(baseEdge, arcStyle)
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{
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this.baseDrawer.Draw(baseEdge, arcStyle);
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this.context.lineWidth = 10;
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var positions = baseEdge.GetEdgePositionsShift();
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var progressSize = 10;
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if (positions[0].equals(positions[1]))
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{
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var sizeInRadian = progressSize / (2 * Math.PI * this.baseDrawer.model.GetLoopSize()) * 6;
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this.context.beginPath();
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this.context.arc(positions[0].x - Math.cos(this.baseDrawer.model.GetLoopShiftAngel()) * this.baseDrawer.model.GetLoopSize(),
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positions[0].y - Math.sin(this.baseDrawer.model.GetLoopShiftAngel()) * this.baseDrawer.model.GetLoopSize(), this.baseDrawer.model.GetLoopSize(), this.progress * 2 * Math.PI, this.progress * 2 * Math.PI + sizeInRadian);
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this.context.stroke();
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}
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else
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{
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var startPosition = this.baseDrawer.GetPointOnArc(positions[0], positions[1], this.progress);
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var vectorOffset = positions[0].subtract(positions[1]).normalizeCopy(progressSize);
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var finishPosition = startPosition.add(vectorOffset);
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this.context.beginPath();
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this.context.moveTo(startPosition.x, startPosition.y);
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this.context.lineTo(finishPosition.x, finishPosition.y);
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this.context.stroke();
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}
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}
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function CurvedArcDrawer(context, model)
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{
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this.context = context;
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this.model = model;
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}
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CurvedArcDrawer.prototype = Object.create(BaseEdgeDrawer.prototype);
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CurvedArcDrawer.prototype.DrawArc = function(position1, position2, arcStyle)
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{
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this.context.setLineDash(lineDashTypes[arcStyle.lineDash]);
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if (position1.equals(position2))
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{
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this.context.beginPath();
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this.context.arc(position1.x - Math.cos(this.model.GetLoopShiftAngel()) * this.model.GetLoopSize(),
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position1.y - Math.sin(this.model.GetLoopShiftAngel()) * this.model.GetLoopSize(), this.model.GetLoopSize(), 0, 2 * Math.PI);
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this.context.closePath();
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this.context.stroke();
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}
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else
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{
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var points = this.model.GetBezierPoints(position1, position2);
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var firstBezierPoint = points[0];
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var secondBezierPoint = points[1];
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this.context.beginPath();
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this.context.moveTo(position1.x, position1.y);
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this.context.bezierCurveTo(firstBezierPoint.x, firstBezierPoint.y, secondBezierPoint.x, secondBezierPoint.y, position2.x, position2.y);
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this.context.stroke();
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}
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this.context.setLineDash([]);
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}
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CurvedArcDrawer.prototype.GetStartArrowDirection = function(position1, position2, lengthArrow)
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{
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var dist = position1.distance(position2);
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var direction = position1.subtract(this.model.GetCurvePoint(position1, position2, lengthArrow / dist));
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direction.normalize(1.0);
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return direction;
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}
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CurvedArcDrawer.prototype.GetFinishArrowDirection = function(position1, position2, lengthArrow)
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{
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var dist = position1.distance(position2);
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var direction = position2.subtract(this.model.GetCurvePoint(position1, position2, 1.0 - lengthArrow / dist));
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direction.normalize(1.0);
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return direction;
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}
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CurvedArcDrawer.prototype.GetTextCenterPoint = function (position1, position2, hasPair, arcStyle)
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{
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var centerPoint = this.model.GetCurvePoint(position1, position2, 0.5)
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if (position1.equals(position2))
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{
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let sinVal = Math.sin(this.model.GetLoopShiftAngel());
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let cosVal = Math.cos(this.model.GetLoopShiftAngel());
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centerPoint.x = centerPoint.x - cosVal * this.model.GetLoopSize();
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centerPoint.y = centerPoint.y - (sinVal + Math.sign(sinVal) * 1.0) * this.model.GetLoopSize();
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}
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return centerPoint;
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}
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CurvedArcDrawer.prototype.GetPointOnArc = function (position1, position2, percent)
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{
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return this.model.GetCurvePoint(position1, position2, percent);
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}
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