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/*
* Copyright 2000-2013 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.ui;
import java.io.Serializable;
import com.vaadin.shared.ui.MarginInfo;
/**
* Extension to the {@link ComponentContainer} interface which adds the
* layouting control to the elements in the container. This is required by the
* various layout components to enable them to place other components in
* specific locations in the UI.
*
* @author Vaadin Ltd.
* @since 3.0
*/
public interface Layout extends ComponentContainer, Serializable {
/**
* AlignmentHandler is most commonly an advanced {@link Layout} that can
* align its components.
*/
public interface AlignmentHandler extends Serializable {
/**
* Set alignment for one contained component in this layout. Use
* predefined alignments from Alignment class.
*
* Example: <code>
* layout.setComponentAlignment(myComponent, Alignment.TOP_RIGHT);
* </code>
*
* @param childComponent
* the component to align within it's layout cell.
* @param alignment
* the Alignment value to be set
*/
public void setComponentAlignment(Component childComponent,
Alignment alignment);
/**
* Returns the current Alignment of given component.
*
* @param childComponent
* @return the {@link Alignment}
*/
public Alignment getComponentAlignment(Component childComponent);
}
/**
* This type of layout supports automatic addition of space between its
* components.
*
*/
public interface SpacingHandler extends Serializable {
/**
* Enable spacing between child components within this layout.
*
* <p>
* <strong>NOTE:</strong> This will only affect the space between
* components, not the space around all the components in the layout
* (i.e. do not confuse this with the cellspacing attribute of a HTML
* Table). Use {@link #setMargin(boolean)} to add space around the
* layout.
* </p>
*
* <p>
* See the reference manual for more information about CSS rules for
* defining the amount of spacing to use.
* </p>
*
* @param enabled
* true if spacing should be turned on, false if it should be
* turned off
*/
public void setSpacing(boolean enabled);
/**
*
* @return true if spacing between child components within this layout
* is enabled, false otherwise
*/
public boolean isSpacing();
}
/**
* This type of layout supports automatic addition of margins (space around
* its components).
*/
public interface MarginHandler extends Serializable {
/**
* Enable layout margins. Affects all four sides of the layout. This
* will tell the client-side implementation to leave extra space around
* the layout. The client-side implementation decides the actual amount,
* and it can vary between themes.
*
* @param enabled
* true if margins should be enabled on all sides, false to
* disable all margins
*/
public void setMargin(boolean enabled);
/**
* Enable margins for this layout.
*
* <p>
* <strong>NOTE:</strong> This will only affect the space around the
* components in the layout, not space between the components in the
* layout. Use {@link #setSpacing(boolean)} to add space between the
* components in the layout.
* </p>
*
* <p>
* See the reference manual for more information about CSS rules for
* defining the size of the margin.
* </p>
*
* @param marginInfo
* MarginInfo object containing the new margins.
*/
public void setMargin(MarginInfo marginInfo);
/**
*
* @return MarginInfo containing the currently enabled margins.
*/
public MarginInfo getMargin();
}
}
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