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Arne Keller 2021-03-11 15:07:47 +01:00
parent 6b84aa5402
commit d68d0abd2b
1 changed files with 5 additions and 5 deletions
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10
frontend/src/mathjax-proof-tree.ts
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@ -247,11 +247,11 @@ class MathjaxProofTree extends MathjaxAdapter {
this.hammer = Hammer(options.svgElement);
// @ts-ignore
this.hammer.get('pinch').set({enable: true})
this.hammer.get('pinch').set({enable: true});
// Handle double tap
// @ts-ignore
this.hammer.on('doubletap', function(ev) {
this.hammer.on('doubletap', () => {
options.instance.zoomIn()
});
@ -259,7 +259,7 @@ class MathjaxProofTree extends MathjaxAdapter {
let pannedY = 0;
// Handle pan
// @ts-ignore
this.hammer.on('panstart panmove', function(ev){
this.hammer.on('panstart panmove', ev => {
// On pan start reset panned variables
if (ev.type === 'panstart') {
pannedX = 0
@ -270,7 +270,7 @@ class MathjaxProofTree extends MathjaxAdapter {
instance.panBy({x: ev.deltaX - pannedX, y: ev.deltaY - pannedY})
pannedX = ev.deltaX
pannedY = ev.deltaY
})
});
let initialScale = 1;
// Handle pinch
@ -283,7 +283,7 @@ class MathjaxProofTree extends MathjaxAdapter {
}
instance.zoomAtPoint(initialScale * ev.scale, {x: ev.center.x, y: ev.center.y})
})
});
// Prevent moving the page on some devices when panning over SVG
options.svgElement.addEventListener('touchmove', function(e: TouchEvent){ e.preventDefault(); });