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Merge pull request #2160 from joedf/patch-2

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apply only zoom constraint by default for scroll events
This commit is contained in:
Ian Gilman 2022-06-09 15:41:17 -07:00 committed by GitHub
commit 71a1f06e35
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 44 additions and 18 deletions
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62
src/viewport.js
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@ -500,36 +500,62 @@ $.Viewport.prototype = {
if (this.wrapHorizontal) {
//do nothing
} else {
var horizontalThreshold = this.visibilityRatio * newBounds.width;
var boundsRight = newBounds.x + newBounds.width;
var contentRight = this._contentBoundsNoRotate.x + this._contentBoundsNoRotate.width;
var leftDx = this._contentBoundsNoRotate.x - boundsRight + horizontalThreshold;
var rightDx = contentRight - newBounds.x - horizontalThreshold;
if (horizontalThreshold > this._contentBoundsNoRotate.width) {
newBounds.x += (leftDx + rightDx) / 2;
} else if (rightDx < 0) {
newBounds.x += rightDx;
} else if (leftDx > 0) {
newBounds.x += leftDx;
var horizontalThreshold, leftDx, rightDx;
if (newBounds.width > this._contentBoundsNoRotate.width) {
horizontalThreshold = this.visibilityRatio * this._contentBoundsNoRotate.width;
leftDx = this._contentBoundsNoRotate.x - newBounds.x + horizontalThreshold;
rightDx = contentRight - boundsRight - horizontalThreshold;
if (rightDx > 0) {
newBounds.x += rightDx;
} else if (leftDx < 0) {
newBounds.x += leftDx;
}
} else {
horizontalThreshold = this.visibilityRatio * newBounds.width;
leftDx = this._contentBoundsNoRotate.x - boundsRight + horizontalThreshold;
rightDx = contentRight - newBounds.x - horizontalThreshold;
if (horizontalThreshold > this._contentBoundsNoRotate.width) {
newBounds.x += (leftDx + rightDx) / 2;
} else if (rightDx < 0) {
newBounds.x += rightDx;
} else if (leftDx > 0) {
newBounds.x += leftDx;
}
}
}
if (this.wrapVertical) {
//do nothing
} else {
var verticalThreshold = this.visibilityRatio * newBounds.height;
var boundsBottom = newBounds.y + newBounds.height;
var contentBottom = this._contentBoundsNoRotate.y + this._contentBoundsNoRotate.height;
var topDy = this._contentBoundsNoRotate.y - boundsBottom + verticalThreshold;
var bottomDy = contentBottom - newBounds.y - verticalThreshold;
if (verticalThreshold > this._contentBoundsNoRotate.height) {
newBounds.y += (topDy + bottomDy) / 2;
} else if (bottomDy < 0) {
newBounds.y += bottomDy;
} else if (topDy > 0) {
newBounds.y += topDy;
var verticalThreshold, topDy, bottomDy;
if (newBounds.height > this._contentBoundsNoRotate.height) {
verticalThreshold = this.visibilityRatio * this._contentBoundsNoRotate.height;
topDy = this._contentBoundsNoRotate.y - newBounds.y + verticalThreshold;
bottomDy = contentBottom - boundsBottom - verticalThreshold;
if (bottomDy > 0) {
newBounds.y += bottomDy;
} else if (topDy < 0) {
newBounds.y += topDy;
}
} else {
verticalThreshold = this.visibilityRatio * newBounds.height;
topDy = this._contentBoundsNoRotate.y - boundsBottom + verticalThreshold;
bottomDy = contentBottom - newBounds.y - verticalThreshold;
if (verticalThreshold > this._contentBoundsNoRotate.height) {
newBounds.y += (topDy + bottomDy) / 2;
} else if (bottomDy < 0) {
newBounds.y += bottomDy;
} else if (topDy > 0) {
newBounds.y += topDy;
}
}
}