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/*
* Copyright 2000-2014 Vaadin Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.vaadin.client.ui.grid;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.Style.Unit;
/**
* A functional interface that can be used for positioning elements in the DOM.
*
* @since
* @author Vaadin Ltd
*/
interface PositionFunction {
/**
* A position function using "transform: translate3d(x,y,z)" to position
* elements in the DOM.
*/
public static class Translate3DPosition implements PositionFunction {
@Override
public void set(Element e, double x, double y) {
e.getStyle().setProperty("transform",
"translate3d(" + x + "px, " + y + "px, 0)");
}
@Override
public void reset(Element e) {
e.getStyle().clearProperty("transform");
}
}
/**
* A position function using "transform: translate(x,y)" to position
* elements in the DOM.
*/
public static class TranslatePosition implements PositionFunction {
@Override
public void set(Element e, double x, double y) {
e.getStyle().setProperty("transform",
"translate(" + x + "px," + y + "px)");
}
@Override
public void reset(Element e) {
e.getStyle().clearProperty("transform");
}
}
/**
* A position function using "-webkit-transform: translate3d(x,y,z)" to
* position elements in the DOM.
*/
public static class WebkitTranslate3DPosition implements PositionFunction {
@Override
public void set(Element e, double x, double y) {
e.getStyle().setProperty("webkitTransform",
"translate3d(" + x + "px," + y + "px,0)");
}
@Override
public void reset(Element e) {
e.getStyle().clearProperty("webkitTransform");
}
}
/**
* A position function using "left: x" and "top: y" to position elements in
* the DOM.
*/
public static class AbsolutePosition implements PositionFunction {
@Override
public void set(Element e, double x, double y) {
e.getStyle().setLeft(x, Unit.PX);
e.getStyle().setTop(y, Unit.PX);
}
@Override
public void reset(Element e) {
e.getStyle().clearLeft();
e.getStyle().clearTop();
}
}
/**
* Position an element in an (x,y) coordinate system in the DOM.
*
* @param e
* the element to position. Never <code>null</code>.
* @param x
* the x coordinate, in pixels
* @param y
* the y coordinate, in pixels
*/
void set(Element e, double x, double y);
/**
* Resets any previously applied positioning, clearing the used style
* attributes.
*
* @param e
* the element for which to reset the positioning
*/
void reset(Element e);
}
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