You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
204 lines
5.5 KiB
204 lines
5.5 KiB
class NodeBase {
|
|
constructor(options, body, labelModule) {
|
|
this.body = body;
|
|
this.labelModule = labelModule;
|
|
this.setOptions(options);
|
|
this.top = undefined;
|
|
this.left = undefined;
|
|
this.height = undefined;
|
|
this.width = undefined;
|
|
this.radius = undefined;
|
|
this.margin = undefined;
|
|
this.refreshNeeded = true;
|
|
this.boundingBox = {top: 0, left: 0, right: 0, bottom: 0};
|
|
}
|
|
|
|
setOptions(options) {
|
|
this.options = options;
|
|
}
|
|
|
|
_setMargins(labelModule) {
|
|
this.margin = {};
|
|
if (this.options.margin) {
|
|
if (typeof this.options.margin == 'object') {
|
|
this.margin.top = this.options.margin.top;
|
|
this.margin.right = this.options.margin.right;
|
|
this.margin.bottom = this.options.margin.bottom;
|
|
this.margin.left = this.options.margin.left;
|
|
} else {
|
|
this.margin.top = this.options.margin;
|
|
this.margin.right = this.options.margin;
|
|
this.margin.bottom = this.options.margin;
|
|
this.margin.left = this.options.margin;
|
|
}
|
|
}
|
|
labelModule.adjustSizes(this.margin)
|
|
}
|
|
|
|
_distanceToBorder(ctx,angle) {
|
|
var borderWidth = this.options.borderWidth;
|
|
this.resize(ctx);
|
|
return Math.min(
|
|
Math.abs(this.width / 2 / Math.cos(angle)),
|
|
Math.abs(this.height / 2 / Math.sin(angle))) + borderWidth;
|
|
}
|
|
|
|
enableShadow(ctx, values) {
|
|
if (values.shadow) {
|
|
ctx.shadowColor = values.shadowColor;
|
|
ctx.shadowBlur = values.shadowSize;
|
|
ctx.shadowOffsetX = values.shadowX;
|
|
ctx.shadowOffsetY = values.shadowY;
|
|
}
|
|
}
|
|
|
|
disableShadow(ctx, values) {
|
|
if (values.shadow) {
|
|
ctx.shadowColor = 'rgba(0,0,0,0)';
|
|
ctx.shadowBlur = 0;
|
|
ctx.shadowOffsetX = 0;
|
|
ctx.shadowOffsetY = 0;
|
|
}
|
|
}
|
|
|
|
enableBorderDashes(ctx, values) {
|
|
if (values.borderDashes !== false) {
|
|
if (ctx.setLineDash !== undefined) {
|
|
let dashes = values.borderDashes;
|
|
if (dashes === true) {
|
|
dashes = [5,15]
|
|
}
|
|
ctx.setLineDash(dashes);
|
|
}
|
|
else {
|
|
console.warn("setLineDash is not supported in this browser. The dashed borders cannot be used.");
|
|
this.options.shapeProperties.borderDashes = false;
|
|
values.borderDashes = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
disableBorderDashes(ctx, values) {
|
|
if (values.borderDashes !== false) {
|
|
if (ctx.setLineDash !== undefined) {
|
|
ctx.setLineDash([0]);
|
|
}
|
|
else {
|
|
console.warn("setLineDash is not supported in this browser. The dashed borders cannot be used.");
|
|
this.options.shapeProperties.borderDashes = false;
|
|
values.borderDashes = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Determine if the shape of a node needs to be recalculated.
|
|
*
|
|
* @param {boolean} selected
|
|
* @param {boolean} hover
|
|
* @returns {boolean}
|
|
* @protected
|
|
*/
|
|
needsRefresh(selected, hover) {
|
|
if (this.refreshNeeded === true) {
|
|
// This is probably not the best location to reset this member.
|
|
// However, in the current logic, it is the most convenient one.
|
|
this.refreshNeeded = false;
|
|
return true;
|
|
}
|
|
|
|
return (this.width === undefined) || (this.labelModule.differentState(selected, hover));
|
|
}
|
|
|
|
|
|
initContextForDraw(ctx, values) {
|
|
var borderWidth = values.borderWidth / this.body.view.scale;
|
|
|
|
ctx.lineWidth = Math.min(this.width, borderWidth);
|
|
ctx.strokeStyle = values.borderColor;
|
|
ctx.fillStyle = values.color;
|
|
}
|
|
|
|
|
|
performStroke(ctx, values) {
|
|
var borderWidth = values.borderWidth / this.body.view.scale;
|
|
|
|
//draw dashed border if enabled, save and restore is required for firefox not to crash on unix.
|
|
ctx.save();
|
|
// if borders are zero width, they will be drawn with width 1 by default. This prevents that
|
|
if (borderWidth > 0) {
|
|
this.enableBorderDashes(ctx, values);
|
|
//draw the border
|
|
ctx.stroke();
|
|
//disable dashed border for other elements
|
|
this.disableBorderDashes(ctx, values);
|
|
}
|
|
ctx.restore();
|
|
}
|
|
|
|
|
|
performFill(ctx, values) {
|
|
// draw shadow if enabled
|
|
this.enableShadow(ctx, values);
|
|
// draw the background
|
|
ctx.fill();
|
|
// disable shadows for other elements.
|
|
this.disableShadow(ctx, values);
|
|
|
|
this.performStroke(ctx, values);
|
|
}
|
|
|
|
|
|
_addBoundingBoxMargin(margin) {
|
|
this.boundingBox.left -= margin;
|
|
this.boundingBox.top -= margin;
|
|
this.boundingBox.bottom += margin;
|
|
this.boundingBox.right += margin;
|
|
}
|
|
|
|
|
|
/**
|
|
* Actual implementation of this method call.
|
|
*
|
|
* Doing it like this makes it easier to override
|
|
* in the child classes.
|
|
*
|
|
* @param {number} x width
|
|
* @param {number} y height
|
|
* @param {CanvasRenderingContext2D} ctx
|
|
* @param {boolean} selected
|
|
* @param {boolean} hover
|
|
* @private
|
|
*/
|
|
_updateBoundingBox(x, y, ctx, selected, hover) {
|
|
if (ctx !== undefined) {
|
|
this.resize(ctx, selected, hover);
|
|
}
|
|
|
|
this.left = x - this.width / 2;
|
|
this.top = y - this.height/ 2;
|
|
|
|
this.boundingBox.left = this.left;
|
|
this.boundingBox.top = this.top;
|
|
this.boundingBox.bottom = this.top + this.height;
|
|
this.boundingBox.right = this.left + this.width;
|
|
}
|
|
|
|
|
|
/**
|
|
* Default implementation of this method call.
|
|
* This acts as a stub which can be overridden.
|
|
*
|
|
* @param {number} x width
|
|
* @param {number} y height
|
|
* @param {CanvasRenderingContext2D} ctx
|
|
* @param {boolean} selected
|
|
* @param {boolean} hover
|
|
*/
|
|
updateBoundingBox(x, y, ctx, selected, hover) {
|
|
this._updateBoundingBox(x, y, ctx, selected, hover);
|
|
}
|
|
}
|
|
|
|
export default NodeBase;
|