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Fixed bug in canvas dragging, must fix the one on resizing.

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Signed-off-by: npalomba <nicola.palomba@studenti.galileilivorno.gov.it>
This commit is contained in:
npalomba
2019-03-31 17:15:03 +02:00
parent a9d380ec1d
commit 16d816db18
8 changed files with 53 additions and 29 deletions
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11
js/_changeZoom.js
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@ -1,5 +1,5 @@
function changeZoom (direction, cursorLocation) {
function changeZoom (layer, direction, cursorLocation) {
var oldWidth = canvasSize[0] * zoom;
var oldHeight = canvasSize[1] * zoom;
@ -13,7 +13,7 @@ function changeZoom (direction, cursorLocation) {
newHeight = canvasSize[1] * zoom;
//adjust canvas position
setCanvasOffset(canvas.offsetLeft + (oldWidth - newWidth) *cursorLocation[0]/oldWidth, canvas.offsetTop + (oldHeight - newHeight) *cursorLocation[1]/oldWidth)
setCanvasOffset(layer.canvas, layer.canvas.offsetLeft + (oldWidth - newWidth) *cursorLocation[0]/oldWidth, layer.canvas.offsetTop + (oldHeight - newHeight) *cursorLocation[1]/oldWidth)
}
//if you want to zoom in
else if (direction == 'in' && zoom + Math.ceil(zoom/10) < window.innerHeight/4){
@ -22,12 +22,13 @@ function changeZoom (direction, cursorLocation) {
newHeight = canvasSize[1] * zoom;
//adjust canvas position
setCanvasOffset(canvas.offsetLeft - Math.round((newWidth - oldWidth)*cursorLocation[0]/oldWidth), canvas.offsetTop - Math.round((newHeight - oldHeight)*cursorLocation[1]/oldHeight))
setCanvasOffset(layer.canvas, canvas, layer.canvas.offsetLeft - Math.round((newWidth - oldWidth)*cursorLocation[0]/oldWidth), layer.canvas.offsetTop - Math.round((newHeight - oldHeight)*cursorLocation[1]/oldHeight))
}
//resize canvas
canvas.style.width = (canvas.width*zoom)+'px';
canvas.style.height = (canvas.height*zoom)+'px';
for (let i=0; i<layers.length; i++) {
layer.resize();
}
// adjust brush size
updateCursor();