Example usage for com.google.gwt.user.client Event getChangedTouches

Introduction

In this page you can find the example usage for com.google.gwt.user.client Event getChangedTouches.

Prototype

public final JsArray<Touch> getChangedTouches() 

Source Link

Document

Get an array of touches which have changed since the last touch event.

Usage

From source file:com.sencha.gxt.sample.graph.client.draw.GraphDnD.java

License:Apache License

protected void onTouchMove(Event e) {
    JsArray<Touch> touches = e.getChangedTouches();

    for (int i = 0; i < touches.length(); i++) {
        Touch t = touches.get(i);//from  w  w w  .ja  v  a 2 s  .c  om
        if (!touchDragStartPositions.containsKey(t.getIdentifier())) {
            //not an active drag
            continue;
        }
        //TODO fire an event about the move
        int x = t.getClientX() - graph.getElement().getAbsoluteTop() + graph.getElement().getScrollTop()
                + graph.getElement().getOwnerDocument().getScrollTop();
        int y = t.getClientY() - graph.getElement().getAbsoluteLeft() + graph.getElement().getScrollLeft()
                + graph.getElement().getOwnerDocument().getScrollLeft();

        touchLastDragPositions.put(t.getIdentifier(), new Point(x, y));
        //TODO consider getting the offset from the original mouse point to the object
        //     and using that here
        onDrag("touch" + t.getIdentifier(), x, y);
        e.preventDefault();
        //      log.finer("Touch move: " + t.getIdentifier() + " @ " + lastDragPosition.get(t.getIdentifier()).toString());
    }

}

---

From source file:com.vaadin.addon.spreadsheet.client.SheetWidget.java

protected void onMouseMoveWhenSelectingCells(Event event) {
    final Element target;

    /*//from ww  w  . ja  va  2  s  . c  o  m
     * Touch events handle target element differently. According to specs,
     * Touch.getTarget() is the equivalent of event.getTarget(). Of course,
     * Safari doesn't follow the specifications; all target references are
     * to the element where we started the drag.
     * 
     * We need to manually parse x/y coords in #getRealEventTargetCell() to
     * find the correct cell.
     */
    if (event.getChangedTouches() != null && event.getChangedTouches().length() > 0) {
        JsArray<Touch> touches = event.getChangedTouches();
        target = touches.get(touches.length() - 1).getTarget().cast();
    } else if (event.getTouches() != null && event.getTouches().length() > 0) {
        JsArray<Touch> touches = event.getTouches();
        target = touches.get(touches.length() - 1).getTarget().cast();
    } else {
        target = event.getEventTarget().cast();
    }

    // Update scroll deltas
    int y = SpreadsheetWidget.getTouchOrMouseClientY(event);
    int x = SpreadsheetWidget.getTouchOrMouseClientX(event);

    if (checkScrollWhileSelecting(y, x)) {
        return;
    }

    int col = 0, row = 0;
    String className = null;
    if (target != null) {
        className = target.getAttribute("class");
        /*
         * Parse according to classname of target element. As said above,
         * Safari gives us the wrong target and hence we have the wrong
         * style name here.
         * 
         * This also means that if we move outside the sheet, we continue
         * execution past this check.
         */
        jsniUtil.parseColRow(className);
        col = jsniUtil.getParsedCol();
        row = jsniUtil.getParsedRow();
    }
    if (row == 0 || col == 0) {
        return;
    }

    // skip search of actual cell if this is a merged cell
    if (!className.endsWith(MERGED_CELL_CLASSNAME)) {
        Cell targetCell = getRealEventTargetCell(x, y, getCell(col, row));
        col = targetCell.getCol();
        row = targetCell.getRow();
    }

    if (col != tempCol || row != tempRow) {
        if (col == 0) { // on top of scroll bar
            if (x > target.getParentElement().getAbsoluteRight()) {
                col = getRightVisibleColumnIndex() + 1;
            } else {
                col = tempCol;
            }
        }
        if (row == 0) {
            if (y > sheet.getAbsoluteBottom()) {
                row = getBottomVisibleRowIndex() + 1;
            } else {
                row = tempRow;
            }
        }
        actionHandler.onSelectingCellsWithDrag(col, row);
        tempCol = col;
        tempRow = row;
    }
}

---

From source file:com.vaadin.addon.spreadsheet.client.SpreadsheetWidget.java

static int getTouchOrMouseClientX(Event event) {
    int scrollLeft = Document.get().getScrollLeft();
    if (WidgetUtil.isTouchEvent(event)) {
        return event.getChangedTouches().get(0).getClientX() + scrollLeft;
    } else {/*ww w. j  av  a  2  s  . c  o  m*/
        return event.getClientX() + scrollLeft;
    }
}

---

From source file:com.vaadin.addon.spreadsheet.client.SpreadsheetWidget.java

static int getTouchOrMouseClientY(Event event) {
    int scrollTop = Document.get().getScrollTop();
    if (WidgetUtil.isTouchEvent(event)) {
        return event.getChangedTouches().get(0).getClientY() + scrollTop;
    } else {//w  ww .j  a  v  a 2s.  c o  m
        return event.getClientY() + scrollTop;
    }
}

---

From source file:com.vaadin.client.widgets.Grid.java

License:Apache License

private boolean handleHeaderDefaultRowEvent(Event event, RowContainer container) {
    if (container != escalator.getHeader()) {
        return false;
    }//from   w w w  .jav a  2s  . c o m
    if (!getHeader().getRow(eventCell.getRowIndex()).isDefault()) {
        return false;
    }
    if (!eventCell.getColumn().isSortable()) {
        // Only handle sorting events if the column is sortable
        return false;
    }

    if (BrowserEvents.MOUSEDOWN.equals(event.getType()) && event.getShiftKey()) {
        // Don't select text when shift clicking on a header.
        event.preventDefault();
    }

    if (BrowserEvents.TOUCHSTART.equals(event.getType())) {
        if (event.getTouches().length() > 1) {
            return false;
        }

        event.preventDefault();

        Touch touch = event.getChangedTouches().get(0);
        rowEventTouchStartingPoint = new Point(touch.getClientX(), touch.getClientY());

        sorter.sortAfterDelay(GridConstants.LONG_TAP_DELAY, true);

        return true;

    } else if (BrowserEvents.TOUCHMOVE.equals(event.getType())) {
        if (event.getTouches().length() > 1) {
            return false;
        }

        event.preventDefault();

        Touch touch = event.getChangedTouches().get(0);
        double diffX = Math.abs(touch.getClientX() - rowEventTouchStartingPoint.getX());
        double diffY = Math.abs(touch.getClientY() - rowEventTouchStartingPoint.getY());

        // Cancel long tap if finger strays too far from
        // starting point
        if (diffX > GridConstants.LONG_TAP_THRESHOLD || diffY > GridConstants.LONG_TAP_THRESHOLD) {
            sorter.cancelDelayedSort();
        }

        return true;

    } else if (BrowserEvents.TOUCHEND.equals(event.getType())) {
        if (event.getTouches().length() > 1) {
            return false;
        }

        if (sorter.isDelayedSortScheduled()) {
            // Not a long tap yet, perform single sort
            sorter.cancelDelayedSort();
            sorter.sort(eventCell.getColumn(), false);
        }

        return true;

    } else if (BrowserEvents.TOUCHCANCEL.equals(event.getType())) {
        if (event.getTouches().length() > 1) {
            return false;
        }

        sorter.cancelDelayedSort();

        return true;

    } else if (BrowserEvents.CLICK.equals(event.getType())) {

        sorter.sort(eventCell.getColumn(), event.getShiftKey());

        // Click events should go onward to cell focus logic
        return false;
    } else {
        return false;
    }
}

---

From source file:com.vaadin.client.WidgetUtil.java

License:Apache License

/**
 * A helper method to return the client position from an event. Returns
 * position from either first changed touch (if touch event) or from the
 * event itself.//from  ww w. j a  va  2 s .  co m
 * 
 * @param event
 * @return
 */
public static int getTouchOrMouseClientX(Event event) {
    if (isTouchEvent(event)) {
        return event.getChangedTouches().get(0).getClientX();
    } else {
        return event.getClientX();
    }
}

---

From source file:com.vaadin.client.WidgetUtil.java

License:Apache License

/**
 * A helper method to return the client position from an event. Returns
 * position from either first changed touch (if touch event) or from the
 * event itself.//ww w .ja  v  a 2  s  .co m
 * 
 * @param event
 * @return
 */
public static int getTouchOrMouseClientY(Event event) {
    if (isTouchEvent(event)) {
        return event.getChangedTouches().get(0).getClientY();
    } else {
        return event.getClientY();
    }
}

---

From source file:com.vaadin.client.WidgetUtil.java

License:Apache License

public static void simulateClickFromTouchEvent(Event touchevent, Widget widget) {
    Touch touch = touchevent.getChangedTouches().get(0);
    final NativeEvent createMouseUpEvent = Document.get().createMouseUpEvent(0, touch.getScreenX(),
            touch.getScreenY(), touch.getClientX(), touch.getClientY(), false, false, false, false,
            NativeEvent.BUTTON_LEFT);/*from   w ww. ja  va  2  s .  c o m*/
    final NativeEvent createMouseDownEvent = Document.get().createMouseDownEvent(0, touch.getScreenX(),
            touch.getScreenY(), touch.getClientX(), touch.getClientY(), false, false, false, false,
            NativeEvent.BUTTON_LEFT);
    final NativeEvent createMouseClickEvent = Document.get().createClickEvent(0, touch.getScreenX(),
            touch.getScreenY(), touch.getClientX(), touch.getClientY(), false, false, false, false);

    /*
     * Get target with element from point as we want the actual element, not
     * the one that sunk the event.
     */
    final Element target = getElementFromPoint(touch.getClientX(), touch.getClientY());

    /*
     * Fixes infocusable form fields in Safari of iOS 5.x and some Android
     * browsers.
     */
    Widget targetWidget = findWidget(target, null);
    if (targetWidget instanceof com.google.gwt.user.client.ui.Focusable) {
        final com.google.gwt.user.client.ui.Focusable toBeFocusedWidget = (com.google.gwt.user.client.ui.Focusable) targetWidget;
        toBeFocusedWidget.setFocus(true);
    } else if (targetWidget instanceof Focusable) {
        ((Focusable) targetWidget).focus();
    }

    Scheduler.get().scheduleDeferred(new ScheduledCommand() {
        @Override
        public void execute() {
            try {
                target.dispatchEvent(createMouseDownEvent);
                target.dispatchEvent(createMouseUpEvent);
                target.dispatchEvent(createMouseClickEvent);
            } catch (Exception e) {
            }

        }
    });

}

---

From source file:com.vaadin.terminal.gwt.client.Util.java

License:Open Source License

public static void simulateClickFromTouchEvent(Event touchevent, Widget widget) {
    Touch touch = touchevent.getChangedTouches().get(0);
    final NativeEvent createMouseUpEvent = Document.get().createMouseUpEvent(0, touch.getScreenX(),
            touch.getScreenY(), touch.getClientX(), touch.getClientY(), false, false, false, false,
            NativeEvent.BUTTON_LEFT);// w  w w  . ja  v  a  2  s .co m
    final NativeEvent createMouseDownEvent = Document.get().createMouseDownEvent(0, touch.getScreenX(),
            touch.getScreenY(), touch.getClientX(), touch.getClientY(), false, false, false, false,
            NativeEvent.BUTTON_LEFT);
    final NativeEvent createMouseClickEvent = Document.get().createClickEvent(0, touch.getScreenX(),
            touch.getScreenY(), touch.getClientX(), touch.getClientY(), false, false, false, false);

    /*
     * Get target with element from point as we want the actual element, not
     * the one that sunk the event.
     */
    final Element target = getElementFromPoint(touch.getClientX(), touch.getClientY());
    Scheduler.get().scheduleDeferred(new ScheduledCommand() {
        public void execute() {
            try {
                target.dispatchEvent(createMouseDownEvent);
                target.dispatchEvent(createMouseUpEvent);
                target.dispatchEvent(createMouseClickEvent);
            } catch (Exception e) {
            }

        }
    });

}

---