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handle cleanup of test viewer

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This commit is contained in:
Tom 2024-11-13 13:17:39 -05:00
parent 63a174d5c2
commit e128ff3a72
1 changed files with 11 additions and 2 deletions
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13
src/webgldrawer.js
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@ -1347,12 +1347,12 @@
// Create a small element for the test viewer and append it to our viewer's element
const div = document.createElement('div');
div.setAttribute('id', 'osd_internal_test');
div.style.width = '4px';
div.style.height = '4px';
div.style.position = 'fixed';
div.style.top = 0;
div.style.left = 0;
div.style.opacity = 0.0001;
this.viewer.element.appendChild( div );
// create the test viewer
@ -1361,6 +1361,13 @@
// reset testing flag to false so additional viewers can be tested
testing = false;
// Clean up the test viewer when the main viewer is destroyed (if it hasn't been already)
testViewer.addOnceHandler('before-destroy', () => {
testViewer.destroy();
if(div.parentNode){
div.parentNode.removeChild(div);
}
});
// Once a frame is drawn, check the pixel values in the output canvas
testViewer.addOnceHandler('update-viewport', () => {
const numNonZeroValues = testViewer.drawer._outputContext.getImageData(0, 0, 4, 4).data.filter( pixel => pixel > 0).length;
@ -1388,7 +1395,9 @@
// Clean up the test viewer
setTimeout( () => testViewer.destroy(), 0);
this.viewer.element.removeChild(div);
if(div.parentNode){
div.parentNode.removeChild(div);
}
});
// Open the test image using the dataUrl from above