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Merge pull request #1414 from francescocretti/hotfix/keyboardPatch

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keyboard handlers patch
This commit is contained in:
Ian Gilman 2018-03-07 09:23:45 -08:00 committed by GitHub
commit 6c7fcb1063
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 86 additions and 27 deletions
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65
src/viewer.js
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@ -2477,31 +2477,61 @@ function onBlur(){
}
function onCanvasKeyDown( event ) {
if ( !event.preventDefaultAction && !event.ctrl && !event.alt && !event.meta ) {
var canvasKeyDownEventArgs = {
originalEvent: event.originalEvent,
preventDefaultAction: event.preventDefaultAction,
preventVerticalPan: event.preventVerticalPan,
preventHorizontalPan: event.preventHorizontalPan
};
/**
* Raised when a keyboard key is pressed and the focus is on the {@link OpenSeadragon.Viewer#canvas} element.
*
* @event canvas-key
* @memberof OpenSeadragon.Viewer
* @type {object}
* @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
* @property {Object} originalEvent - The original DOM event.
* @property {Boolean} preventDefaultAction - Set to true to prevent default keyboard behaviour. Default: false.
* @property {Boolean} preventVerticalPan - Set to true to prevent keyboard vertical panning. Default: false.
* @property {Boolean} preventHorizontalPan - Set to true to prevent keyboard horizontal panning. Default: false.
* @property {?Object} userData - Arbitrary subscriber-defined object.
*/
this.raiseEvent('canvas-key', canvasKeyDownEventArgs);
if ( !canvasKeyDownEventArgs.preventDefaultAction && !event.ctrl && !event.alt && !event.meta ) {
switch( event.keyCode ){
case 38://up arrow
if (!canvasKeyDownEventArgs.preventVerticalPan) {
if ( event.shift ) {
this.viewport.zoomBy(1.1);
} else {
this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(0, -this.pixelsPerArrowPress)));
}
this.viewport.applyConstraints();
}
return false;
case 40://down arrow
if (!canvasKeyDownEventArgs.preventVerticalPan) {
if ( event.shift ) {
this.viewport.zoomBy(0.9);
} else {
this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(0, this.pixelsPerArrowPress)));
}
this.viewport.applyConstraints();
}
return false;
case 37://left arrow
if (!canvasKeyDownEventArgs.preventHorizontalPan) {
this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(-this.pixelsPerArrowPress, 0)));
this.viewport.applyConstraints();
}
return false;
case 39://right arrow
if (!canvasKeyDownEventArgs.preventHorizontalPan) {
this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(this.pixelsPerArrowPress, 0)));
this.viewport.applyConstraints();
}
return false;
default:
//console.log( 'navigator keycode %s', event.keyCode );
@ -2511,9 +2541,30 @@ function onCanvasKeyDown( event ) {
return true;
}
}
function onCanvasKeyPress( event ) {
if ( !event.preventDefaultAction && !event.ctrl && !event.alt && !event.meta ) {
var canvasKeyPressEventArgs = {
originalEvent: event.originalEvent,
preventDefaultAction: event.preventDefaultAction,
preventVerticalPan: event.preventVerticalPan,
preventHorizontalPan: event.preventHorizontalPan
};
/**
* Raised when a keyboard key is pressed and the focus is on the {@link OpenSeadragon.Viewer#canvas} element.
*
* @event canvas-key
* @memberof OpenSeadragon.Viewer
* @type {object}
* @property {OpenSeadragon.Viewer} eventSource - A reference to the Viewer which raised this event.
* @property {Object} originalEvent - The original DOM event.
* @property {Boolean} preventDefaultAction - Set to true to prevent default keyboard behaviour. Default: false.
* @property {Boolean} preventVerticalPan - Set to true to prevent keyboard vertical panning. Default: false.
* @property {Boolean} preventHorizontalPan - Set to true to prevent keyboard horizontal panning. Default: false.
* @property {?Object} userData - Arbitrary subscriber-defined object.
*/
this.raiseEvent('canvas-key', canvasKeyPressEventArgs);
if ( !canvasKeyPressEventArgs.preventDefaultAction && !event.ctrl && !event.alt && !event.meta ) {
switch( event.keyCode ){
case 43://=|+
case 61://=|+
@ -2530,29 +2581,37 @@ function onCanvasKeyPress( event ) {
return false;
case 119://w
case 87://W
if (!canvasKeyPressEventArgs.preventVerticalPan) {
if ( event.shift ) {
this.viewport.zoomBy(1.1);
} else {
this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(0, -40)));
}
this.viewport.applyConstraints();
}
return false;
case 115://s
case 83://S
if (!canvasKeyPressEventArgs.preventVerticalPan) {
if ( event.shift ) {
this.viewport.zoomBy(0.9);
} else {
this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(0, 40)));
}
this.viewport.applyConstraints();
}
return false;
case 97://a
if (!canvasKeyPressEventArgs.preventHorizontalPan) {
this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(-40, 0)));
this.viewport.applyConstraints();
}
return false;
case 100://d
if (!canvasKeyPressEventArgs.preventHorizontalPan) {
this.viewport.panBy(this.viewport.deltaPointsFromPixels(new $.Point(40, 0)));
this.viewport.applyConstraints();
}
return false;
default:
//console.log( 'navigator keycode %s', event.keyCode );