com.google.gwt.event.dom.client.ScrollEvent Java Examples

@Override
public void onScroll(ScrollEvent event) {
    final Element element = event.getNativeEvent().getEventTarget().cast();
    if (element != container) {
        return;
    }
    AnimationScheduler.get().requestAnimationFrame(new AnimationCallback() {

        @Override
        public void execute(double timestamp) {
            int sl = container.getScrollLeft();
            int st = container.getScrollTop();
            if (sl != previousContainerScrollLeft) {
                timeline.setScrollLeft(sl);
                previousContainerScrollLeft = sl;
            }
            if (st != previousContainerScrollTop) {
                previousContainerScrollTop = st;
            }
        }
    });
}
 

@Override
public void onScroll(ScrollEvent event) {
    if (delegatingVerticalScroll) {
        // if other component is scrolling, don't allow this scroll
        // event
        return;
    }
    AnimationScheduler.get().requestAnimationFrame(new AnimationCallback() {

        @Override
        public void execute(double timestamp) {
            ganttScrollDelay.cancel();
            ganttDelegatingVerticalScroll = true;
            int scrollTop = getWidget().getScrollContainer().getScrollTop();
            try {
                if (delegateScrollGridTarget != null) {
                    delegateScrollGridTarget.setScrollTop(scrollTop);
                }

            } finally {
                ganttScrollDelay.schedule(20);
            }
        }
    });
}
 

public ScrollPanel getViewAsScrollPanel() {
	scrollPanel.addScrollHandler(new ScrollHandler() {
		@Override
		public void onScroll(ScrollEvent event) {
			unsynchronizedShapes();
		}
	});
	return scrollPanel;
}
 

/**
 * Get the scroll panel in the drawing cavcas.
 * @return
 */
public ScrollPanel getViewAsScrollPanel() {
	scrollPanel.addScrollHandler(new ScrollHandler() {
		@Override
		public void onScroll(ScrollEvent event) {
		}
	});
	return scrollPanel;
}
 

public UIHider(int uiHideDelay, Widget textLayer) {
	this.uiHideDelay = uiHideDelay;
	textLayer.addDomHandler(this, MouseMoveEvent.getType());
	textLayer.addDomHandler(this, KeyDownEvent.getType());
	textLayer.addDomHandler(this, ScrollEvent.getType());
	textLayer.addDomHandler(this, TouchStartEvent.getType());
}
 

public TextLayer(Djvu_html5 app) {
	this.app = app;
	setStyleName("textLayer");
	getElement().setAttribute("tabindex", "-1");

	addDomHandler(this, ScrollEvent.getType());

	app.getDataStore().addInfoListener(this::pageInfoAvailable);
	if (DjvuContext.getTextLayerEnabled())
		app.getDataStore().addTextListener(this::textAvailable);

	fontMeasure = Canvas.createIfSupported().getContext2d();
}
 

@Override
public void onScroll(ScrollEvent event) {
	int scrollTop = getElement().getScrollTop();
	int page = currentPage;
	Element pageElement = pages.get(page).getElement();
	while (page > 0 && pageElement.getOffsetTop() > scrollTop) {
		pageElement = pages.get(--page).getElement();
	}
	while (page + 1 < pages.size() && pageElement.getOffsetTop() + pageElement.getOffsetHeight() < scrollTop) {
		pageElement = pages.get(++page).getElement();
	}
	int left = pageElement.getOffsetLeft() - getElement().getScrollLeft();
	int top = pageElement.getOffsetTop() - scrollTop;
	app.getPageLayout().externalScroll(page, left, top);
}
 

@Override
public void onScroll(ScrollEvent event) {
    if (ganttDelegatingVerticalScroll) {
        // if gantt is scrolling, don't allow this scroll event
        return;
    }
    AnimationScheduler.get().requestAnimationFrame(new AnimationCallback() {

        @Override
        public void execute(double timestamp) {
            onDelegateScroll();
        }
    });
}
 

@Override
public void onScroll(com.vaadin.client.widget.grid.events.ScrollEvent event) {
    if (ganttDelegatingVerticalScroll) {
        // if gantt is scrolling, don't allow this scroll event
        return;
    }
    AnimationScheduler.get().requestAnimationFrame(new AnimationCallback() {

        @Override
        public void execute(double timestamp) {
            onDelegateScroll();
        }
    });
}
 

@Override
public void onScroll(ScrollEvent event) {
	showUI();
}
 

/**
 * Reset listeners.
 */
public void resetListeners() {
    Event.sinkEvents(container, Event.ONSCROLL | Event.ONCONTEXTMENU);

    if (contextMenuHandlerRegistration == null) {
        contextMenuHandlerRegistration = addDomHandler(contextMenuHandler, ContextMenuEvent.getType());
    }

    if (scrollHandlerRegistration == null) {
        scrollHandlerRegistration = addHandler(scrollHandler, ScrollEvent.getType());
    }
    if (isMsTouchSupported()) {
        // IE10 pointer events (ms-prefixed events)
        if (pointerDownHandlerRegistration == null) {
            pointerDownHandlerRegistration = addDomHandler(msPointerDownHandler, PointerDownEvent.getType());
        }
        if (pointerUpHandlerRegistration == null) {
            pointerUpHandlerRegistration = addDomHandler(msPointerUpHandler, PointerUpEvent.getType());
        }
        if (pointerMoveHandlerRegistration == null) {
            pointerMoveHandlerRegistration = addDomHandler(msPointerMoveHandler, PointerMoveEvent.getType());
        }
        if (pointerCancelHandlerRegistration == null) {
            pointerCancelHandlerRegistration = addHandler(msPointerCancelHandler, PointerCancelEvent.getType());
        }
    } else if (touchSupported) {
        // touch events replaces mouse events
        if (touchStartHandlerRegistration == null) {
            touchStartHandlerRegistration = addDomHandler(touchStartHandler, TouchStartEvent.getType());
        }
        if (touchEndHandlerRegistration == null) {
            touchEndHandlerRegistration = addDomHandler(touchEndHandler, TouchEndEvent.getType());
        }
        if (touchMoveHandlerRegistration == null) {
            touchMoveHandlerRegistration = addDomHandler(touchMoveHandler, TouchMoveEvent.getType());
        }
        if (touchCancelHandlerRegistration == null) {
            touchCancelHandlerRegistration = addHandler(touchCancelHandler, TouchCancelEvent.getType());
        }

    } else {
        if (mouseDblClickHandlerRegistration == null) {
            mouseDblClickHandlerRegistration = addDomHandler(doubleClickHandler, DoubleClickEvent.getType());
        }
        if (mouseDownHandlerRegistration == null) {
            mouseDownHandlerRegistration = addDomHandler(mouseDownHandler, MouseDownEvent.getType());
        }
        if (mouseUpHandlerRegistration == null) {
            mouseUpHandlerRegistration = addDomHandler(mouseUpHandler, MouseUpEvent.getType());
        }
        if (isMovableSteps() || isResizableSteps()) {
            if (mouseMoveHandlerRegistration == null) {
                mouseMoveHandlerRegistration = addDomHandler(mouseMoveHandler, MouseMoveEvent.getType());
            }
        } else if (mouseMoveHandlerRegistration != null) {
            mouseMoveHandlerRegistration.removeHandler();
            mouseMoveHandlerRegistration = null;
        }
    }
}