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Merge pull request #399 from msalsbery/constrain-during-pan

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Improved Viewer Options Support in Gesture Handling
This commit is contained in:
iangilman 2014-05-07 09:05:54 -07:00
commit 6c7e2160cb
1 changed files with 22 additions and 6 deletions
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28
src/viewer.js
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@ -2319,7 +2319,7 @@ function onCanvasDrag( event ) {
event.delta.y = 0;
}
this.viewport.panBy( this.viewport.deltaPointsFromPixels( event.delta.negate() ), gestureSettings.flickEnabled );
if( this.constrainDuringPan && !gestureSettings.flickEnabled ){
if( this.constrainDuringPan ){
this.viewport.applyConstraints();
}
}
@ -2355,11 +2355,17 @@ function onCanvasDragEnd( event ) {
if ( !event.preventDefaultAction && this.viewport ) {
gestureSettings = this.gestureSettingsByDeviceType( event.pointerType );
if ( gestureSettings.flickEnabled && event.speed >= gestureSettings.flickMinSpeed && !event.preventDefaultAction && this.viewport ) {
if ( gestureSettings.flickEnabled && event.speed >= gestureSettings.flickMinSpeed ) {
var amplitudeX = gestureSettings.flickMomentum * ( event.speed * Math.cos( event.direction ) ),
amplitudeY = gestureSettings.flickMomentum * ( event.speed * Math.sin( event.direction ) ),
center = this.viewport.pixelFromPoint( this.viewport.getCenter( true ) ),
target = this.viewport.pointFromPixel( new $.Point( center.x - amplitudeX, center.y - amplitudeY ) );
if( !this.panHorizontal ) {
target.x = center.x;
}
if( !this.panVertical ) {
target.y = center.y;
}
this.viewport.panTo( target, false );
this.viewport.applyConstraints();
}
@ -2423,15 +2429,25 @@ function onCanvasRelease( event ) {
}
function onCanvasPinch( event ) {
var gestureSettings;
var gestureSettings,
centerPt,
lastCenterPt,
panByPt;
if ( !event.preventDefaultAction && this.viewport ) {
gestureSettings = this.gestureSettingsByDeviceType( event.pointerType );
if ( gestureSettings.pinchToZoom ) {
var centerPt = this.viewport.pointFromPixel( event.center, true ),
lastCenterPt = this.viewport.pointFromPixel( event.lastCenter, true );
centerPt = this.viewport.pointFromPixel( event.center, true );
lastCenterPt = this.viewport.pointFromPixel( event.lastCenter, true );
panByPt = lastCenterPt.minus( centerPt );
if( !this.panHorizontal ) {
panByPt.x = 0;
}
if( !this.panVertical ) {
panByPt.y = 0;
}
this.viewport.zoomBy( event.distance / event.lastDistance, centerPt, true );
this.viewport.panBy( lastCenterPt.minus( centerPt ), true );
this.viewport.panBy( panByPt, true );
this.viewport.applyConstraints();
}
}