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Merge pull request #2225 from HamzaTatheer/master

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One touch zoom in & out function #2077
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Ian Gilman 2022-11-16 14:16:13 -08:00 committed by GitHub
commit 5bba14a763
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5 changed files with 121 additions and 7143 deletions
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package-lock.json generated
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2
src/control.js
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@ -74,6 +74,7 @@ $.ControlAnchor = {
* @param {Element} container - the element to control will be anchored too.
*/
$.Control = function ( element, options, container ) {
var parent = element.parentNode;
if (typeof options === 'number')
{
@ -150,6 +151,7 @@ $.Control = function ( element, options, container ) {
} else {
parent.appendChild( this.wrapper );
}
};
/** @lends OpenSeadragon.Control.prototype */

18
src/openseadragon.js
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@ -341,6 +341,9 @@
* @property {Boolean} [gestureSettingsMouse.clickToZoom=true] - Zoom on click gesture
* @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.dblClickDragToZoom=false] - Zoom on dragging through
* double-click gesture ( single click and next click to drag). 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.
@ -356,6 +359,10 @@
* @property {Boolean} [gestureSettingsTouch.clickToZoom=false] - Zoom on click gesture
* @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.dblClickDragToZoom=true] - Zoom on dragging through
* double-click gesture ( single click and next click to drag). 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.
@ -386,6 +393,9 @@
* @property {Boolean} [gestureSettingsUnknown.clickToZoom=false] - Zoom on click gesture
* @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.dblClickDragToZoom=false] - Zoom on dragging through
* double-click gesture ( single click and next click to drag). 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.
@ -400,6 +410,9 @@
* @property {Number} [zoomPerScroll=1.2]
* The "zoom distance" per mouse scroll or touch pinch. <em><strong>Note:</strong> Setting this to 1.0 effectively disables the mouse-wheel zoom feature (also see gestureSettings[Mouse|Touch|Pen].scrollToZoom}).</em>
*
* @property {Number} [zoomPerDblClickDrag=1.2]
* The "zoom distance" per double-click mouse drag. <em><strong>Note:</strong> Setting this to 1.0 effectively disables the double-click-drag-to-Zoom feature (also see gestureSettings[Mouse|Touch|Pen].dblClickDragToZoom).</em>
*
* @property {Number} [zoomPerSecond=1.0]
* Sets the zoom amount per second when zoomIn/zoomOut buttons are pressed and held.
* The value is a factor of the current zoom, so 1.0 (the default) disables zooming when the zoomIn/zoomOut buttons
@ -1203,6 +1216,7 @@ function OpenSeadragon( options ){
scrollToZoom: true,
clickToZoom: true,
dblClickToZoom: false,
dblClickDragToZoom: false,
pinchToZoom: false,
zoomToRefPoint: true,
flickEnabled: false,
@ -1215,6 +1229,7 @@ function OpenSeadragon( options ){
scrollToZoom: false,
clickToZoom: false,
dblClickToZoom: true,
dblClickDragToZoom: true,
pinchToZoom: true,
zoomToRefPoint: true,
flickEnabled: true,
@ -1227,6 +1242,7 @@ function OpenSeadragon( options ){
scrollToZoom: false,
clickToZoom: true,
dblClickToZoom: false,
dblClickDragToZoom: false,
pinchToZoom: false,
zoomToRefPoint: true,
flickEnabled: false,
@ -1239,6 +1255,7 @@ function OpenSeadragon( options ){
scrollToZoom: false,
clickToZoom: false,
dblClickToZoom: true,
dblClickDragToZoom: false,
pinchToZoom: true,
zoomToRefPoint: true,
flickEnabled: true,
@ -1248,6 +1265,7 @@ function OpenSeadragon( options ){
},
zoomPerClick: 2,
zoomPerScroll: 1.2,
zoomPerDblClickDrag: 1.2,
zoomPerSecond: 1.0,
blendTime: 0,
alwaysBlend: false,

68
src/viewer.js
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@ -212,7 +212,9 @@ $.Viewer = function( options ) {
zoomFactor: null,
lastZoomTime: null,
fullPage: false,
onfullscreenchange: null
onfullscreenchange: null,
lastClickTime: null,
draggingToZoom: false,
};
this._sequenceIndex = 0;
@ -2854,6 +2856,8 @@ function onCanvasKeyPress( event ) {
}
}
function onCanvasClick( event ) {
var gestureSettings;
@ -2893,17 +2897,31 @@ function onCanvasClick( event ) {
* @property {Boolean} preventDefaultAction - Set to true to prevent default click to zoom behaviour. Default: false.
* @property {?Object} userData - Arbitrary subscriber-defined object.
*/
this.raiseEvent( 'canvas-click', canvasClickEventArgs);
if ( !canvasClickEventArgs.preventDefaultAction && this.viewport && event.quick ) {
gestureSettings = this.gestureSettingsByDeviceType( event.pointerType );
if ( gestureSettings.clickToZoom ) {
if (gestureSettings.clickToZoom === true){
this.viewport.zoomBy(
event.shift ? 1.0 / this.zoomPerClick : this.zoomPerClick,
gestureSettings.zoomToRefPoint ? this.viewport.pointFromPixel( event.position, true ) : null
);
this.viewport.applyConstraints();
}
if( gestureSettings.dblClickDragToZoom){
if(THIS[ this.hash ].draggingToZoom === true){
THIS[ this.hash ].lastClickTime = null;
THIS[ this.hash ].draggingToZoom = false;
}
else{
THIS[ this.hash ].lastClickTime = $.now();
}
}
}
}
@ -2983,7 +3001,13 @@ function onCanvasDrag( event ) {
gestureSettings = this.gestureSettingsByDeviceType( event.pointerType );
if ( gestureSettings.dragToPan && !canvasDragEventArgs.preventDefaultAction && this.viewport ) {
if(!canvasDragEventArgs.preventDefaultAction && this.viewport){
if (gestureSettings.dblClickDragToZoom && THIS[ this.hash ].draggingToZoom){
var factor = Math.pow( this.zoomPerDblClickDrag, event.delta.y / 50);
this.viewport.zoomBy(factor);
}
else if (gestureSettings.dragToPan && !THIS[ this.hash ].draggingToZoom) {
if( !this.panHorizontal ){
event.delta.x = 0;
}
@ -3014,12 +3038,15 @@ function onCanvasDrag( event ) {
event.delta.y = 0;
}
}
this.viewport.panBy( this.viewport.deltaPointsFromPixels( event.delta.negate() ), gestureSettings.flickEnabled && !this.constrainDuringPan);
}
}
}
function onCanvasDragEnd( event ) {
var gestureSettings;
var canvasDragEndEventArgs = {
tracker: event.eventSource,
pointerType: event.pointerType,
@ -3050,9 +3077,11 @@ function onCanvasDragEnd( event ) {
*/
this.raiseEvent('canvas-drag-end', canvasDragEndEventArgs);
gestureSettings = this.gestureSettingsByDeviceType( event.pointerType );
if (!canvasDragEndEventArgs.preventDefaultAction && this.viewport) {
var gestureSettings = this.gestureSettingsByDeviceType(event.pointerType);
if (gestureSettings.flickEnabled &&
if ( !THIS[ this.hash ].draggingToZoom &&
gestureSettings.flickEnabled &&
event.speed >= gestureSettings.flickMinSpeed) {
var amplitudeX = 0;
if (this.panHorizontal) {
@ -3072,6 +3101,13 @@ function onCanvasDragEnd( event ) {
}
this.viewport.applyConstraints();
}
if( gestureSettings.dblClickDragToZoom && THIS[ this.hash ].draggingToZoom === true ){
THIS[ this.hash ].draggingToZoom = false;
}
}
function onCanvasEnter( event ) {
@ -3135,6 +3171,8 @@ function onCanvasLeave( event ) {
}
function onCanvasPress( event ) {
var gestureSettings;
/**
* Raised when the primary mouse button is pressed or touch starts on the {@link OpenSeadragon.Viewer#canvas} element.
*
@ -3158,6 +3196,24 @@ function onCanvasPress( event ) {
insideElementReleased: event.insideElementReleased,
originalEvent: event.originalEvent
});
gestureSettings = this.gestureSettingsByDeviceType( event.pointerType );
if ( gestureSettings.dblClickDragToZoom ){
var lastClickTime = THIS[ this.hash ].lastClickTime;
var currClickTime = $.now();
if ( lastClickTime === null) {
return;
}
if ((currClickTime - lastClickTime) < this.dblClickTimeThreshold) {
THIS[ this.hash ].draggingToZoom = true;
}
THIS[ this.hash ].lastClickTime = null;
}
}
function onCanvasRelease( event ) {