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Merge pull request #1423 from jetic83/master

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Added optional zoom in the middle of the image instead of pointer position.
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Ian Gilman 2018-03-19 10:19:27 -07:00 committed by GitHub
commit 053332e282
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 18 additions and 4 deletions
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12
src/openseadragon.js
View File

@ -314,6 +314,8 @@
* @property {Boolean} [gestureSettingsMouse.dblClickToZoom=false] - Zoom on double-click gesture. Note: If set to true
* then clickToZoom should be set to false to prevent multiple zooms.
* @property {Boolean} [gestureSettingsMouse.pinchToZoom=false] - Zoom on pinch gesture
* @property {Boolean} [gestureSettingsMouse.zoomToRefPoint=true] - If zoomToRefPoint is true, the zoom is centered at the pointer position. Otherwise,
* the zoom is centered at the canvas center.
* @property {Boolean} [gestureSettingsMouse.flickEnabled=false] - Enable flick gesture
* @property {Number} [gestureSettingsMouse.flickMinSpeed=120] - If flickEnabled is true, the minimum speed to initiate a flick gesture (pixels-per-second)
* @property {Number} [gestureSettingsMouse.flickMomentum=0.25] - If flickEnabled is true, the momentum factor for the flick gesture
@ -326,6 +328,8 @@
* @property {Boolean} [gestureSettingsTouch.dblClickToZoom=true] - Zoom on double-click gesture. Note: If set to true
* then clickToZoom should be set to false to prevent multiple zooms.
* @property {Boolean} [gestureSettingsTouch.pinchToZoom=true] - Zoom on pinch gesture
* @property {Boolean} [gestureSettingsTouch.zoomToRefPoint=true] - If zoomToRefPoint is true, the zoom is centered at the pointer position. Otherwise,
* the zoom is centered at the canvas center.
* @property {Boolean} [gestureSettingsTouch.flickEnabled=true] - Enable flick gesture
* @property {Number} [gestureSettingsTouch.flickMinSpeed=120] - If flickEnabled is true, the minimum speed to initiate a flick gesture (pixels-per-second)
* @property {Number} [gestureSettingsTouch.flickMomentum=0.25] - If flickEnabled is true, the momentum factor for the flick gesture
@ -338,6 +342,8 @@
* @property {Boolean} [gestureSettingsPen.dblClickToZoom=false] - Zoom on double-click gesture. Note: If set to true
* then clickToZoom should be set to false to prevent multiple zooms.
* @property {Boolean} [gestureSettingsPen.pinchToZoom=false] - Zoom on pinch gesture
* @property {Boolean} [gestureSettingsPan.zoomToRefPoint=true] - If zoomToRefPoint is true, the zoom is centered at the pointer position. Otherwise,
* the zoom is centered at the canvas center.
* @property {Boolean} [gestureSettingsPen.flickEnabled=false] - Enable flick gesture
* @property {Number} [gestureSettingsPen.flickMinSpeed=120] - If flickEnabled is true, the minimum speed to initiate a flick gesture (pixels-per-second)
* @property {Number} [gestureSettingsPen.flickMomentum=0.25] - If flickEnabled is true, the momentum factor for the flick gesture
@ -350,6 +356,8 @@
* @property {Boolean} [gestureSettingsUnknown.dblClickToZoom=true] - Zoom on double-click gesture. Note: If set to true
* then clickToZoom should be set to false to prevent multiple zooms.
* @property {Boolean} [gestureSettingsUnknown.pinchToZoom=true] - Zoom on pinch gesture
* @property {Boolean} [gestureSettingsUnknown.zoomToRefPoint=true] - If zoomToRefPoint is true, the zoom is centered at the pointer position. Otherwise,
* the zoom is centered at the canvas center.
* @property {Boolean} [gestureSettingsUnknown.flickEnabled=true] - Enable flick gesture
* @property {Number} [gestureSettingsUnknown.flickMinSpeed=120] - If flickEnabled is true, the minimum speed to initiate a flick gesture (pixels-per-second)
* @property {Number} [gestureSettingsUnknown.flickMomentum=0.25] - If flickEnabled is true, the momentum factor for the flick gesture
@ -1044,6 +1052,7 @@ function OpenSeadragon( options ){
clickToZoom: true,
dblClickToZoom: false,
pinchToZoom: false,
zoomToRefPoint: true,
flickEnabled: false,
flickMinSpeed: 120,
flickMomentum: 0.25,
@ -1054,6 +1063,7 @@ function OpenSeadragon( options ){
clickToZoom: false,
dblClickToZoom: true,
pinchToZoom: true,
zoomToRefPoint: true,
flickEnabled: true,
flickMinSpeed: 120,
flickMomentum: 0.25,
@ -1064,6 +1074,7 @@ function OpenSeadragon( options ){
clickToZoom: true,
dblClickToZoom: false,
pinchToZoom: false,
zoomToRefPoint: true,
flickEnabled: false,
flickMinSpeed: 120,
flickMomentum: 0.25,
@ -1074,6 +1085,7 @@ function OpenSeadragon( options ){
clickToZoom: false,
dblClickToZoom: true,
pinchToZoom: true,
zoomToRefPoint: true,
flickEnabled: true,
flickMinSpeed: 120,
flickMomentum: 0.25,

8
src/viewer.js
View File

@ -2652,7 +2652,7 @@ function onCanvasClick( event ) {
if ( gestureSettings.clickToZoom ) {
this.viewport.zoomBy(
event.shift ? 1.0 / this.zoomPerClick : this.zoomPerClick,
this.viewport.pointFromPixel( event.position, true )
gestureSettings.zoomToRefPoint ? this.viewport.pointFromPixel( event.position, true ) : null
);
this.viewport.applyConstraints();
}
@ -2691,7 +2691,7 @@ function onCanvasDblClick( event ) {
if ( gestureSettings.dblClickToZoom ) {
this.viewport.zoomBy(
event.shift ? 1.0 / this.zoomPerClick : this.zoomPerClick,
this.viewport.pointFromPixel( event.position, true )
gestureSettings.zoomToRefPoint ? this.viewport.pointFromPixel( event.position, true ) : null
);
this.viewport.applyConstraints();
}
@ -3005,7 +3005,9 @@ function onCanvasPinch( event ) {
panByPt.y = 0;
}
this.viewport.zoomBy( event.distance / event.lastDistance, centerPt, true );
if ( gestureSettings.zoomToRefPoint ) {
this.viewport.panBy(panByPt, true);
}
this.viewport.applyConstraints();
}
if ( gestureSettings.pinchRotate ) {
@ -3068,7 +3070,7 @@ function onCanvasScroll( event ) {
factor = Math.pow( this.zoomPerScroll, event.scroll );
this.viewport.zoomBy(
factor,
this.viewport.pointFromPixel( event.position, true )
gestureSettings.zoomToRefPoint ? this.viewport.pointFromPixel( event.position, true ) : null
);
this.viewport.applyConstraints();
}