vis.js is a dynamic, browser-based visualization library
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  1. 'use strict';
  2. import NodeBase from '../util/NodeBase'
  3. class Text extends NodeBase {
  4. constructor(options, body, labelModule) {
  5. super(options, body, labelModule);
  6. }
  7. resize(ctx, selected) {
  8. if (this.width === undefined) {
  9. var margin = 5;
  10. var textSize = this.labelModule.getTextSize(ctx,selected);
  11. this.width = textSize.width + 2 * margin;
  12. this.height = textSize.height + 2 * margin;
  13. }
  14. }
  15. draw(ctx, x, y, selected, hover) {
  16. this.resize(ctx, selected || hover);
  17. this.left = x - this.width / 2;
  18. this.top = y - this.height / 2;
  19. // draw shadow if enabled
  20. this.enableShadow(ctx);
  21. this.labelModule.draw(ctx, x, y, selected || hover);
  22. // disable shadows for other elements.
  23. this.disableShadow(ctx);
  24. this.updateBoundingBox(x,y);
  25. }
  26. updateBoundingBox(x,y) {
  27. this.left = x - this.width / 2;
  28. this.top = y - this.height / 2;
  29. this.boundingBox.top = this.top;
  30. this.boundingBox.left = this.left;
  31. this.boundingBox.right = this.left + this.width;
  32. this.boundingBox.bottom = this.top + this.height;
  33. }
  34. distanceToBorder(ctx, angle) {
  35. this.resize(ctx);
  36. return this._distanceToBorder(angle);
  37. }
  38. }
  39. export default Text;