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Always scroll to top when resizing

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This commit is contained in:
Liam Westby 2018-03-29 09:30:39 -05:00
parent 7e3d73aa1c
commit 11366c662c
1 changed files with 16 additions and 2 deletions
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18
frontend/prebuild/src/app/controls/controls.component.ts
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@ -30,7 +30,12 @@ export class ControlsComponent implements OnInit, OnDestroy {
private preventScrolling = (evt: TouchEvent) => {
evt.preventDefault();
};
}
private pageWasResized = (evt: DeviceOrientationEvent) => {
this.windowHeight = window.innerHeight;
window.scrollTo(0, 0);
}
constructor(private gameService: GameService) {
gameService.messages.subscribe((msg) => {
@ -65,6 +70,11 @@ export class ControlsComponent implements OnInit, OnDestroy {
this.moveRight();
}
};
// Make sure the view is at the top of the page so touch event coordinates line up
window.scrollTo(0, 0);
window.addEventListener('orientationchange', this.pageWasResized);
window.addEventListener('resize', this.pageWasResized);
}
initCanvas() {
@ -132,7 +142,9 @@ export class ControlsComponent implements OnInit, OnDestroy {
}
draw() {
this.windowHeight = window.innerHeight;
if (window.scrollY != 0) {
window.scrollTo(0, 0);
}
const ctx = this.context;
ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);
ctx.strokeStyle = 'white';
@ -342,5 +354,7 @@ export class ControlsComponent implements OnInit, OnDestroy {
ngOnDestroy() {
window.removeEventListener('touchmove', this.preventScrolling);
window.removeEventListener('orientationchange', this.pageWasResized);
window.removeEventListener('resize', this.pageWasResized);
}
}