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Added option pixelsPerArrowPress that sets the speed of movement by arrow keys

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This commit is contained in:
Jan Hudecek 2017-12-14 17:10:10 +01:00
parent b0f6b5d049
commit 5ddcfa438e
2 changed files with 8 additions and 4 deletions
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4
src/openseadragon.js
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@ -266,6 +266,9 @@
* @property {Number} [pixelsPerWheelLine=40]
* For pixel-resolution scrolling devices, the number of pixels equal to one scroll line.
*
* @property {Number} [pixelsPerArrowPress=40]
* The number of pixels viewport moves when an arrow key is pressed.
*
* @property {Number} [visibilityRatio=0.5]
* The percentage ( as a number from 0 to 1 ) of the source image which
* must be kept within the viewport. If the image is dragged beyond that
@ -1088,6 +1091,7 @@ function OpenSeadragon( options ){
smoothTileEdgesMinZoom: 1.1, //-> higher than maxZoomPixelRatio disables it
iOSDevice: isIOSDevice(),
pixelsPerWheelLine: 40,
pixelsPerArrowPress: 40,
autoResize: true,
preserveImageSizeOnResize: false, // requires autoResize=true
minScrollDeltaTime: 50,

8
src/viewer.js
View File

@ -2483,7 +2483,7 @@ function onCanvasKeyDown( event ) {
if ( event.shift ) {
this.viewport.zoomBy(1.1);
} else {
this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(0, -40)));
this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(0, -this.pixelsPerArrowPress)));
}
this.viewport.applyConstraints();
return false;
@ -2491,16 +2491,16 @@ function onCanvasKeyDown( event ) {
if ( event.shift ) {
this.viewport.zoomBy(0.9);
} else {
this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(0, 40)));
this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(0, this.pixelsPerArrowPress)));
}
this.viewport.applyConstraints();
return false;
case 37://left arrow
this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(-40, 0)));
this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(-this.pixelsPerArrowPress, 0)));
this.viewport.applyConstraints();
return false;
case 39://right arrow
this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(40, 0)));
this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(this.pixelsPerArrowPress, 0)));
this.viewport.applyConstraints();
return false;
default: