/*
* 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.ui;
import java.io.Serializable;
import java.lang.reflect.Method;
import java.util.Iterator;
import com.vaadin.event.ConnectorEventListener;
import com.vaadin.event.MouseEvents.ClickEvent;
import com.vaadin.server.Sizeable;
import com.vaadin.shared.EventId;
import com.vaadin.shared.MouseEventDetails;
import com.vaadin.shared.ui.splitpanel.AbstractSplitPanelRpc;
import com.vaadin.shared.ui.splitpanel.AbstractSplitPanelState;
import com.vaadin.shared.ui.splitpanel.AbstractSplitPanelState.SplitterState;
import com.vaadin.util.ReflectTools;
/**
* AbstractSplitPanel.
*
* <code>AbstractSplitPanel</code> is base class for a component container that
* can contain two components. The components are split by a divider element.
*
* @author Vaadin Ltd.
* @since 6.5
*/
public abstract class AbstractSplitPanel extends AbstractComponentContainer {
// TODO use Unit in AbstractSplitPanelState and remove these
private Unit posUnit;
private Unit posMinUnit;
private Unit posMaxUnit;
private AbstractSplitPanelRpc rpc = new AbstractSplitPanelRpc() {
@Override
public void splitterClick(MouseEventDetails mouseDetails) {
fireEvent(new SplitterClickEvent(AbstractSplitPanel.this,
mouseDetails));
}
@Override
public void setSplitterPosition(float position) {
getSplitterState().position = position;
}
};
public AbstractSplitPanel() {
registerRpc(rpc);
setSplitPosition(50, Unit.PERCENTAGE, false);
setSplitPositionLimits(0, Unit.PERCENTAGE, 100, Unit.PERCENTAGE);
}
/**
* Modifiable and Serializable Iterator for the components, used by
* {@link AbstractSplitPanel#getComponentIterator()}.
*/
private class ComponentIterator implements Iterator<Component>,
Serializable {
int i = 0;
@Override
public boolean hasNext() {
if (i < getComponentCount()) {
return true;
}
return false;
}
@Override
public Component next() {
if (!hasNext()) {
return null;
}
i++;
if (i == 1) {
return (getFirstComponent() == null ? getSecondComponent()
: getFirstComponent());
} else if (i == 2) {
return getSecondComponent();
}
return null;
}
@Override
public void remove() {
if (i == 1) {
if (getFirstComponent() != null) {
setFirstComponent(null);
i = 0;
} else {
setSecondComponent(null);
}
} else if (i == 2) {
setSecondComponent(null);
}
}
}
/**
* Add a component into this container. The component is added to the right
* or under the previous component.
*
* @param c
* the component to be added.
*/
@Override
public void addComponent(Component c) {
if (getFirstComponent() == null) {
setFirstComponent(c);
} else if (getSecondComponent() == null) {
setSecondComponent(c);
} else {
throw new UnsupportedOperationException(
"Split panel can contain only two components");
}
}
/**
* Sets the first component of this split panel. Depending on the direction
* the first component is shown at the top or to the left.
*
* @param c
* The component to use as first component
*/
public void setFirstComponent(Component c) {
if (getFirstComponent() == c) {
// Nothing to do
return;
}
if (getFirstComponent() != null) {
// detach old
removeComponent(getFirstComponent());
}
getState().firstChild = c;
if (c != null) {
super.addComponent(c);
}
}
/**
* Sets the second component of this split panel. Depending on the direction
* the second component is shown at the bottom or to the left.
*
* @param c
* The component to use as first component
*/
public void setSecondComponent(Component c) {
if (getSecondComponent() == c) {
// Nothing to do
return;
}
if (getSecondComponent() != null) {
// detach old
removeComponent(getSecondComponent());
}
getState().secondChild = c;
if (c != null) {
super.addComponent(c);
}
}
/**
* Gets the first component of this split panel. Depending on the direction
* this is either the component shown at the top or to the left.
*
* @return the first component of this split panel
*/
public Component getFirstComponent() {
return (Component) getState(false).firstChild;
}
/**
* Gets the second component of this split panel. Depending on the direction
* this is either the component shown at the top or to the left.
*
* @return the second component of this split panel
*/
public Component getSecondComponent() {
return (Component) getState(false).secondChild;
}
/**
* Removes the component from this container.
*
* @param c
* the component to be removed.
*/
@Override
public void removeComponent(Component c) {
super.removeComponent(c);
if (c == getFirstComponent()) {
getState().firstChild = null;
} else if (c == getSecondComponent()) {
getState().secondChild = null;
}
markAsDirty();
}
/*
* (non-Javadoc)
*
* @see com.vaadin.ui.ComponentContainer#getComponentIterator()
*/
@Override
public Iterator<Component> iterator() {
return new ComponentIterator();
}
/**
* Gets the number of contained components. Consistent with the iterator
* returned by {@link #getComponentIterator()}.
*
* @return the number of contained components (zero, one or two)
*/
@Override
public int getComponentCount() {
int count = 0;
if (getFirstComponent() != null) {
count++;
}
if (getSecondComponent() != null) {
count++;
}
return count;
}
/* Documented in superclass */
@Override
public void replaceComponent(Component oldComponent, Component newComponent) {
if (oldComponent == getFirstComponent()) {
setFirstComponent(newComponent);
} else if (oldComponent == getSecondComponent()) {
setSecondComponent(newComponent);
}
markAsDirty();
}
/**
* Moves the position of the splitter.
*
* @param pos
* the new size of the first region in the unit that was last
* used (default is percentage). Fractions are only allowed when
* unit is percentage.
*/
public void setSplitPosition(float pos) {
setSplitPosition(pos, posUnit, false);
}
/**
* Moves the position of the splitter.
*
* @param pos
* the new size of the region in the unit that was last used
* (default is percentage). Fractions are only allowed when unit
* is percentage.
*
* @param reverse
* if set to true the split splitter position is measured by the
* second region else it is measured by the first region
*/
public void setSplitPosition(float pos, boolean reverse) {
setSplitPosition(pos, posUnit, reverse);
}
/**
* Moves the position of the splitter with given position and unit.
*
* @param pos
* the new size of the first region. Fractions are only allowed
* when unit is percentage.
* @param unit
* the unit (from {@link Sizeable}) in which the size is given.
*/
public void setSplitPosition(float pos, Unit unit) {
setSplitPosition(pos, unit, false);
}
/**
* Moves the position of the splitter with given position and unit.
*
* @param pos
* the new size of the first region. Fractions are only allowed
* when unit is percentage.
* @param unit
* the unit (from {@link Sizeable}) in which the size is given.
* @param reverse
* if set to true the split splitter position is measured by the
* second region else it is measured by the first region
*
*/
public void setSplitPosition(float pos, Unit unit, boolean reverse) {
if (unit != Unit.PERCENTAGE && unit != Unit.PIXELS) {
throw new IllegalArgumentException(
"Only percentage and pixel units are allowed");
}
if (unit != Unit.PERCENTAGE) {
pos = Math.round(pos);
}
SplitterState splitterState = getSplitterState();
splitterState.position = pos;
splitterState.positionUnit = unit.getSymbol();
splitterState.positionReversed = reverse;
posUnit = unit;
}
/**
* Returns the current position of the splitter, in
* {@link #getSplitPositionUnit()} units.
*
* @return position of the splitter
*/
public float getSplitPosition() {
return getSplitterState(false).position;
}
/**
* Returns the unit of position of the splitter
*
* @return unit of position of the splitter
*/
public Unit getSplitPositionUnit() {
return posUnit;
}
/**
* Sets the minimum split position to the given position and unit. If the
* split position is reversed, maximum and minimum are also reversed.
*
* @param pos
* the minimum position of the split
* @param unit
* the unit (from {@link Sizeable}) in which the size is given.
* Allowed units are UNITS_PERCENTAGE and UNITS_PIXELS
*/
public void setMinSplitPosition(float pos, Unit unit) {
setSplitPositionLimits(pos, unit, getSplitterState(false).maxPosition,
posMaxUnit);
}
/**
* Returns the current minimum position of the splitter, in
* {@link #getMinSplitPositionUnit()} units.
*
* @return the minimum position of the splitter
*/
public float getMinSplitPosition() {
return getSplitterState(false).minPosition;
}
/**
* Returns the unit of the minimum position of the splitter.
*
* @return the unit of the minimum position of the splitter
*/
public Unit getMinSplitPositionUnit() {
return posMinUnit;
}
/**
* Sets the maximum split position to the given position and unit. If the
* split position is reversed, maximum and minimum are also reversed.
*
* @param pos
* the maximum position of the split
* @param unit
* the unit (from {@link Sizeable}) in which the size is given.
* Allowed units are UNITS_PERCENTAGE and UNITS_PIXELS
*/
public void setMaxSplitPosition(float pos, Unit unit) {
setSplitPositionLimits(getSplitterState(false).minPosition, posMinUnit,
pos, unit);
}
/**
* Returns the current maximum position of the splitter, in
* {@link #getMaxSplitPositionUnit()} units.
*
* @return the maximum position of the splitter
*/
public float getMaxSplitPosition() {
return getSplitterState(false).maxPosition;
}
/**
* Returns the unit of the maximum position of the splitter
*
* @return the unit of the maximum position of the splitter
*/
public Unit getMaxSplitPositionUnit() {
return posMaxUnit;
}
/**
* Sets the maximum and minimum position of the splitter. If the split
* position is reversed, maximum and minimum are also reversed.
*
* @param minPos
* the new minimum position
* @param minPosUnit
* the unit (from {@link Sizeable}) in which the minimum position
* is given.
* @param maxPos
* the new maximum position
* @param maxPosUnit
* the unit (from {@link Sizeable}) in which the maximum position
* is given.
*/
private void setSplitPositionLimits(float minPos, Unit minPosUnit,
float maxPos, Unit maxPosUnit) {
if ((minPosUnit != Unit.PERCENTAGE && minPosUnit != Unit.PIXELS)
|| (maxPosUnit != Unit.PERCENTAGE && maxPosUnit != Unit.PIXELS)) {
throw new IllegalArgumentException(
"Only percentage and pixel units are allowed");
}
SplitterState state = getSplitterState();
state.minPosition = minPos;
state.minPositionUnit = minPosUnit.getSymbol();
posMinUnit = minPosUnit;
state.maxPosition = maxPos;
state.maxPositionUnit = maxPosUnit.getSymbol();
posMaxUnit = maxPosUnit;
}
/**
* Lock the SplitPanels position, disabling the user from dragging the split
* handle.
*
* @param locked
* Set <code>true</code> if locked, <code>false</code> otherwise.
*/
public void setLocked(boolean locked) {
getSplitterState().locked = locked;
}
/**
* Is the SplitPanel handle locked (user not allowed to change split
* position by dragging).
*
* @return <code>true</code> if locked, <code>false</code> otherwise.
*/
public boolean isLocked() {
return getSplitterState(false).locked;
}
/**
* <code>SplitterClickListener</code> interface for listening for
* <code>SplitterClickEvent</code> fired by a <code>SplitPanel</code>.
*
* @see SplitterClickEvent
* @since 6.2
*/
public interface SplitterClickListener extends ConnectorEventListener {
public static final Method clickMethod = ReflectTools.findMethod(
SplitterClickListener.class, "splitterClick",
SplitterClickEvent.class);
/**
* SplitPanel splitter has been clicked
*
* @param event
* SplitterClickEvent event.
*/
public void splitterClick(SplitterClickEvent event);
}
public static class SplitterClickEvent extends ClickEvent {
public SplitterClickEvent(Component source,
MouseEventDetails mouseEventDetails) {
super(source, mouseEventDetails);
}
}
public void addSplitterClickListener(SplitterClickListener listener) {
addListener(EventId.CLICK_EVENT_IDENTIFIER, SplitterClickEvent.class,
listener, SplitterClickListener.clickMethod);
}
/**
* @deprecated As of 7.0, replaced by
* {@link #addSplitterClickListener(SplitterClickListener)}
**/
@Deprecated
public void addListener(SplitterClickListener listener) {
addSplitterClickListener(listener);
}
public void removeSplitterClickListener(SplitterClickListener listener) {
removeListener(EventId.CLICK_EVENT_IDENTIFIER,
SplitterClickEvent.class, listener);
}
/**
* @deprecated As of 7.0, replaced by
* {@link #removeSplitterClickListener(SplitterClickListener)}
**/
@Deprecated
public void removeListener(SplitterClickListener listener) {
removeSplitterClickListener(listener);
}
@Override
protected AbstractSplitPanelState getState() {
return (AbstractSplitPanelState) super.getState();
}
@Override
protected AbstractSplitPanelState getState(boolean markAsDirty) {
return (AbstractSplitPanelState) super.getState(markAsDirty);
}
private SplitterState getSplitterState() {
return ((AbstractSplitPanelState) super.getState()).splitterState;
}
private SplitterState getSplitterState(boolean markAsDirty) {
return ((AbstractSplitPanelState) super.getState(markAsDirty)).splitterState;
}
}