Java Code Examples for java.awt.Container#isFocusTraversalPolicyProvider()

The following examples show how to use java.awt.Container#isFocusTraversalPolicyProvider() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: SortingFocusTraversalPolicy.java    From TencentKona-8 with GNU General Public License v2.0 6 votes vote down vote up
private void enumerateCycle(Container container, List<Component> cycle) {
    if (!(container.isVisible() && container.isDisplayable())) {
        return;
    }

    cycle.add(container);

    Component[] components = container.getComponents();
    for (Component comp : components) {
        if (comp instanceof Container) {
            Container cont = (Container)comp;

            if (!cont.isFocusCycleRoot() &&
                !cont.isFocusTraversalPolicyProvider() &&
                !((cont instanceof JComponent) && ((JComponent)cont).isManagingFocus()))
            {
                enumerateCycle(cont, cycle);
                continue;
            }
        }
        cycle.add(comp);
    }
}
 
Example 2
Source File: SortingFocusTraversalPolicy.java    From dragonwell8_jdk with GNU General Public License v2.0 6 votes vote down vote up
private void enumerateCycle(Container container, List<Component> cycle) {
    if (!(container.isVisible() && container.isDisplayable())) {
        return;
    }

    cycle.add(container);

    Component[] components = container.getComponents();
    for (Component comp : components) {
        if (comp instanceof Container) {
            Container cont = (Container)comp;

            if (!cont.isFocusCycleRoot() &&
                !cont.isFocusTraversalPolicyProvider() &&
                !((cont instanceof JComponent) && ((JComponent)cont).isManagingFocus()))
            {
                enumerateCycle(cont, cycle);
                continue;
            }
        }
        cycle.add(comp);
    }
}
 
Example 3
Source File: SortingFocusTraversalPolicy.java    From openjdk-jdk8u-backup with GNU General Public License v2.0 5 votes vote down vote up
private Component getComponentDownCycle(Component comp, int traversalDirection) {
    Component retComp = null;

    if (comp instanceof Container) {
        Container cont = (Container)comp;

        if (cont.isFocusCycleRoot()) {
            if (getImplicitDownCycleTraversal()) {
                retComp = cont.getFocusTraversalPolicy().getDefaultComponent(cont);

                if (retComp != null && log.isLoggable(PlatformLogger.Level.FINE)) {
                    log.fine("### Transfered focus down-cycle to " + retComp +
                             " in the focus cycle root " + cont);
                }
            } else {
                return null;
            }
        } else if (cont.isFocusTraversalPolicyProvider()) {
            retComp = (traversalDirection == FORWARD_TRAVERSAL ?
                       cont.getFocusTraversalPolicy().getDefaultComponent(cont) :
                       cont.getFocusTraversalPolicy().getLastComponent(cont));

            if (retComp != null && log.isLoggable(PlatformLogger.Level.FINE)) {
                log.fine("### Transfered focus to " + retComp + " in the FTP provider " + cont);
            }
        }
    }
    return retComp;
}
 
Example 4
Source File: SortingFocusTraversalPolicy.java    From jdk8u-jdk with GNU General Public License v2.0 5 votes vote down vote up
private Component getComponentDownCycle(Component comp, int traversalDirection) {
    Component retComp = null;

    if (comp instanceof Container) {
        Container cont = (Container)comp;

        if (cont.isFocusCycleRoot()) {
            if (getImplicitDownCycleTraversal()) {
                retComp = cont.getFocusTraversalPolicy().getDefaultComponent(cont);

                if (retComp != null && log.isLoggable(PlatformLogger.Level.FINE)) {
                    log.fine("### Transfered focus down-cycle to " + retComp +
                             " in the focus cycle root " + cont);
                }
            } else {
                return null;
            }
        } else if (cont.isFocusTraversalPolicyProvider()) {
            retComp = (traversalDirection == FORWARD_TRAVERSAL ?
                       cont.getFocusTraversalPolicy().getDefaultComponent(cont) :
                       cont.getFocusTraversalPolicy().getLastComponent(cont));

            if (retComp != null && log.isLoggable(PlatformLogger.Level.FINE)) {
                log.fine("### Transfered focus to " + retComp + " in the FTP provider " + cont);
            }
        }
    }
    return retComp;
}
 
Example 5
Source File: SortingFocusTraversalPolicy.java    From jdk8u-dev-jdk with GNU General Public License v2.0 5 votes vote down vote up
/**
 * Returns the last Component in the traversal cycle. This method is used
 * to determine the next Component to focus when traversal wraps in the
 * reverse direction.
 *
 * @param aContainer a focus cycle root of aComponent or a focus traversal policy provider whose
 *        last Component is to be returned
 * @return the last Component in the traversal cycle of aContainer,
 *         or null if no suitable Component can be found
 * @throws IllegalArgumentException if aContainer is null
 */
public Component getLastComponent(Container aContainer) {
    List<Component> cycle;
    if (log.isLoggable(PlatformLogger.Level.FINE)) {
        log.fine("### Getting last component in " + aContainer);
    }

    if (aContainer == null) {
        throw new IllegalArgumentException("aContainer cannot be null");
    }

    if (this.cachedRoot == aContainer) {
        cycle = this.cachedCycle;
    } else {
        cycle = getFocusTraversalCycle(aContainer);
    }

    if (cycle.size() == 0) {
        if (log.isLoggable(PlatformLogger.Level.FINE)) {
            log.fine("### Cycle is empty");
        }
        return null;
    }
    if (log.isLoggable(PlatformLogger.Level.FINE)) {
        log.fine("### Cycle is " + cycle);
    }

    for (int i= cycle.size() - 1; i >= 0; i--) {
        Component comp = cycle.get(i);
        if (accept(comp)) {
            return comp;
        } else if (comp instanceof Container && comp != aContainer) {
            Container cont = (Container)comp;
            if (cont.isFocusTraversalPolicyProvider()) {
                return cont.getFocusTraversalPolicy().getLastComponent(cont);
            }
        }
    }
    return null;
}
 
Example 6
Source File: SortingFocusTraversalPolicy.java    From TencentKona-8 with GNU General Public License v2.0 5 votes vote down vote up
private Component getComponentDownCycle(Component comp, int traversalDirection) {
    Component retComp = null;

    if (comp instanceof Container) {
        Container cont = (Container)comp;

        if (cont.isFocusCycleRoot()) {
            if (getImplicitDownCycleTraversal()) {
                retComp = cont.getFocusTraversalPolicy().getDefaultComponent(cont);

                if (retComp != null && log.isLoggable(PlatformLogger.Level.FINE)) {
                    log.fine("### Transfered focus down-cycle to " + retComp +
                             " in the focus cycle root " + cont);
                }
            } else {
                return null;
            }
        } else if (cont.isFocusTraversalPolicyProvider()) {
            retComp = (traversalDirection == FORWARD_TRAVERSAL ?
                       cont.getFocusTraversalPolicy().getDefaultComponent(cont) :
                       cont.getFocusTraversalPolicy().getLastComponent(cont));

            if (retComp != null && log.isLoggable(PlatformLogger.Level.FINE)) {
                log.fine("### Transfered focus to " + retComp + " in the FTP provider " + cont);
            }
        }
    }
    return retComp;
}
 
Example 7
Source File: SortingFocusTraversalPolicy.java    From openjdk-jdk9 with GNU General Public License v2.0 5 votes vote down vote up
Container getTopmostProvider(Container focusCycleRoot, Component aComponent) {
    Container aCont = aComponent.getParent();
    Container ftp = null;
    while (aCont  != focusCycleRoot && aCont != null) {
        if (aCont.isFocusTraversalPolicyProvider()) {
            ftp = aCont;
        }
        aCont = aCont.getParent();
    }
    if (aCont == null) {
        return null;
    }
    return ftp;
}
 
Example 8
Source File: SortingFocusTraversalPolicy.java    From openjdk-8 with GNU General Public License v2.0 5 votes vote down vote up
private Component getComponentDownCycle(Component comp, int traversalDirection) {
    Component retComp = null;

    if (comp instanceof Container) {
        Container cont = (Container)comp;

        if (cont.isFocusCycleRoot()) {
            if (getImplicitDownCycleTraversal()) {
                retComp = cont.getFocusTraversalPolicy().getDefaultComponent(cont);

                if (retComp != null && log.isLoggable(PlatformLogger.Level.FINE)) {
                    log.fine("### Transfered focus down-cycle to " + retComp +
                             " in the focus cycle root " + cont);
                }
            } else {
                return null;
            }
        } else if (cont.isFocusTraversalPolicyProvider()) {
            retComp = (traversalDirection == FORWARD_TRAVERSAL ?
                       cont.getFocusTraversalPolicy().getDefaultComponent(cont) :
                       cont.getFocusTraversalPolicy().getLastComponent(cont));

            if (retComp != null && log.isLoggable(PlatformLogger.Level.FINE)) {
                log.fine("### Transfered focus to " + retComp + " in the FTP provider " + cont);
            }
        }
    }
    return retComp;
}
 
Example 9
Source File: SortingFocusTraversalPolicy.java    From dragonwell8_jdk with GNU General Public License v2.0 5 votes vote down vote up
Container getTopmostProvider(Container focusCycleRoot, Component aComponent) {
    Container aCont = aComponent.getParent();
    Container ftp = null;
    while (aCont  != focusCycleRoot && aCont != null) {
        if (aCont.isFocusTraversalPolicyProvider()) {
            ftp = aCont;
        }
        aCont = aCont.getParent();
    }
    if (aCont == null) {
        return null;
    }
    return ftp;
}
 
Example 10
Source File: SortingFocusTraversalPolicy.java    From openjdk-jdk8u-backup with GNU General Public License v2.0 5 votes vote down vote up
Container getTopmostProvider(Container focusCycleRoot, Component aComponent) {
    Container aCont = aComponent.getParent();
    Container ftp = null;
    while (aCont  != focusCycleRoot && aCont != null) {
        if (aCont.isFocusTraversalPolicyProvider()) {
            ftp = aCont;
        }
        aCont = aCont.getParent();
    }
    if (aCont == null) {
        return null;
    }
    return ftp;
}
 
Example 11
Source File: SortingFocusTraversalPolicy.java    From jdk8u-dev-jdk with GNU General Public License v2.0 5 votes vote down vote up
private Component getComponentDownCycle(Component comp, int traversalDirection) {
    Component retComp = null;

    if (comp instanceof Container) {
        Container cont = (Container)comp;

        if (cont.isFocusCycleRoot()) {
            if (getImplicitDownCycleTraversal()) {
                retComp = cont.getFocusTraversalPolicy().getDefaultComponent(cont);

                if (retComp != null && log.isLoggable(PlatformLogger.Level.FINE)) {
                    log.fine("### Transfered focus down-cycle to " + retComp +
                             " in the focus cycle root " + cont);
                }
            } else {
                return null;
            }
        } else if (cont.isFocusTraversalPolicyProvider()) {
            retComp = (traversalDirection == FORWARD_TRAVERSAL ?
                       cont.getFocusTraversalPolicy().getDefaultComponent(cont) :
                       cont.getFocusTraversalPolicy().getLastComponent(cont));

            if (retComp != null && log.isLoggable(PlatformLogger.Level.FINE)) {
                log.fine("### Transfered focus to " + retComp + " in the FTP provider " + cont);
            }
        }
    }
    return retComp;
}
 
Example 12
Source File: SortingFocusTraversalPolicy.java    From dragonwell8_jdk with GNU General Public License v2.0 4 votes vote down vote up
/**
 * Returns the Component that should receive the focus before aComponent.
 * aContainer must be a focus cycle root of aComponent or a focus traversal policy provider.
 * <p>
 * By default, SortingFocusTraversalPolicy implicitly transfers focus down-
 * cycle. That is, during normal focus traversal, the Component
 * traversed after a focus cycle root will be the focus-cycle-root's
 * default Component to focus. This behavior can be disabled using the
 * <code>setImplicitDownCycleTraversal</code> method.
 * <p>
 * If aContainer is <a href="../../java/awt/doc-files/FocusSpec.html#FocusTraversalPolicyProviders">focus
 * traversal policy provider</a>, the focus is always transferred down-cycle.
 *
 * @param aContainer a focus cycle root of aComponent or a focus traversal policy provider
 * @param aComponent a (possibly indirect) child of aContainer, or
 *        aContainer itself
 * @return the Component that should receive the focus before aComponent,
 *         or null if no suitable Component can be found
 * @throws IllegalArgumentException if aContainer is not a focus cycle
 *         root of aComponent or a focus traversal policy provider, or if either aContainer or
 *         aComponent is null
 */
public Component getComponentBefore(Container aContainer, Component aComponent) {
    if (aContainer == null || aComponent == null) {
        throw new IllegalArgumentException("aContainer and aComponent cannot be null");
    }
    if (!aContainer.isFocusTraversalPolicyProvider() && !aContainer.isFocusCycleRoot()) {
        throw new IllegalArgumentException("aContainer should be focus cycle root or focus traversal policy provider");

    } else if (aContainer.isFocusCycleRoot() && !aComponent.isFocusCycleRoot(aContainer)) {
        throw new IllegalArgumentException("aContainer is not a focus cycle root of aComponent");
    }

    // See if the component is inside of policy provider.
    Container provider = getTopmostProvider(aContainer, aComponent);
    if (provider != null) {
        if (log.isLoggable(PlatformLogger.Level.FINE)) {
            log.fine("### Asking FTP " + provider + " for component after " + aComponent);
        }

        // FTP knows how to find component after the given. We don't.
        FocusTraversalPolicy policy = provider.getFocusTraversalPolicy();
        Component beforeComp = policy.getComponentBefore(provider, aComponent);

        // Null result means that we overstepped the limit of the FTP's cycle.
        // In that case we must quit the cycle, otherwise return the component found.
        if (beforeComp != null) {
            if (log.isLoggable(PlatformLogger.Level.FINE)) {
                log.fine("### FTP returned " + beforeComp);
            }
            return beforeComp;
        }
        aComponent = provider;

        // If the provider is traversable it's returned.
        if (accept(aComponent)) {
            return aComponent;
        }
    }

    List<Component> cycle = getFocusTraversalCycle(aContainer);

    if (log.isLoggable(PlatformLogger.Level.FINE)) {
        log.fine("### Cycle is " + cycle + ", component is " + aComponent);
    }

    int index = getComponentIndex(cycle, aComponent);

    if (index < 0) {
        if (log.isLoggable(PlatformLogger.Level.FINE)) {
            log.fine("### Didn't find component " + aComponent + " in a cycle " + aContainer);
        }
        return getLastComponent(aContainer);
    }

    Component comp;
    Component tryComp;

    for (index--; index>=0; index--) {
        comp = cycle.get(index);
        if (comp != aContainer && (tryComp = getComponentDownCycle(comp, BACKWARD_TRAVERSAL)) != null) {
            return tryComp;
        } else if (accept(comp)) {
            return comp;
        }
    }

    if (aContainer.isFocusCycleRoot()) {
        this.cachedRoot = aContainer;
        this.cachedCycle = cycle;

        comp = getLastComponent(aContainer);

        this.cachedRoot = null;
        this.cachedCycle = null;

        return comp;
    }
    return null;
}
 
Example 13
Source File: SortingFocusTraversalPolicy.java    From openjdk-8-source with GNU General Public License v2.0 4 votes vote down vote up
/**
 * Returns the Component that should receive the focus before aComponent.
 * aContainer must be a focus cycle root of aComponent or a focus traversal policy provider.
 * <p>
 * By default, SortingFocusTraversalPolicy implicitly transfers focus down-
 * cycle. That is, during normal focus traversal, the Component
 * traversed after a focus cycle root will be the focus-cycle-root's
 * default Component to focus. This behavior can be disabled using the
 * <code>setImplicitDownCycleTraversal</code> method.
 * <p>
 * If aContainer is <a href="../../java/awt/doc-files/FocusSpec.html#FocusTraversalPolicyProviders">focus
 * traversal policy provider</a>, the focus is always transferred down-cycle.
 *
 * @param aContainer a focus cycle root of aComponent or a focus traversal policy provider
 * @param aComponent a (possibly indirect) child of aContainer, or
 *        aContainer itself
 * @return the Component that should receive the focus before aComponent,
 *         or null if no suitable Component can be found
 * @throws IllegalArgumentException if aContainer is not a focus cycle
 *         root of aComponent or a focus traversal policy provider, or if either aContainer or
 *         aComponent is null
 */
public Component getComponentBefore(Container aContainer, Component aComponent) {
    if (aContainer == null || aComponent == null) {
        throw new IllegalArgumentException("aContainer and aComponent cannot be null");
    }
    if (!aContainer.isFocusTraversalPolicyProvider() && !aContainer.isFocusCycleRoot()) {
        throw new IllegalArgumentException("aContainer should be focus cycle root or focus traversal policy provider");

    } else if (aContainer.isFocusCycleRoot() && !aComponent.isFocusCycleRoot(aContainer)) {
        throw new IllegalArgumentException("aContainer is not a focus cycle root of aComponent");
    }

    // See if the component is inside of policy provider.
    Container provider = getTopmostProvider(aContainer, aComponent);
    if (provider != null) {
        if (log.isLoggable(PlatformLogger.Level.FINE)) {
            log.fine("### Asking FTP " + provider + " for component after " + aComponent);
        }

        // FTP knows how to find component after the given. We don't.
        FocusTraversalPolicy policy = provider.getFocusTraversalPolicy();
        Component beforeComp = policy.getComponentBefore(provider, aComponent);

        // Null result means that we overstepped the limit of the FTP's cycle.
        // In that case we must quit the cycle, otherwise return the component found.
        if (beforeComp != null) {
            if (log.isLoggable(PlatformLogger.Level.FINE)) {
                log.fine("### FTP returned " + beforeComp);
            }
            return beforeComp;
        }
        aComponent = provider;

        // If the provider is traversable it's returned.
        if (accept(aComponent)) {
            return aComponent;
        }
    }

    List<Component> cycle = getFocusTraversalCycle(aContainer);

    if (log.isLoggable(PlatformLogger.Level.FINE)) {
        log.fine("### Cycle is " + cycle + ", component is " + aComponent);
    }

    int index = getComponentIndex(cycle, aComponent);

    if (index < 0) {
        if (log.isLoggable(PlatformLogger.Level.FINE)) {
            log.fine("### Didn't find component " + aComponent + " in a cycle " + aContainer);
        }
        return getLastComponent(aContainer);
    }

    Component comp;
    Component tryComp;

    for (index--; index>=0; index--) {
        comp = cycle.get(index);
        if (comp != aContainer && (tryComp = getComponentDownCycle(comp, BACKWARD_TRAVERSAL)) != null) {
            return tryComp;
        } else if (accept(comp)) {
            return comp;
        }
    }

    if (aContainer.isFocusCycleRoot()) {
        this.cachedRoot = aContainer;
        this.cachedCycle = cycle;

        comp = getLastComponent(aContainer);

        this.cachedRoot = null;
        this.cachedCycle = null;

        return comp;
    }
    return null;
}
 
Example 14
Source File: SortingFocusTraversalPolicy.java    From JDKSourceCode1.8 with MIT License 4 votes vote down vote up
/**
 * Returns the Component that should receive the focus before aComponent.
 * aContainer must be a focus cycle root of aComponent or a focus traversal policy provider.
 * <p>
 * By default, SortingFocusTraversalPolicy implicitly transfers focus down-
 * cycle. That is, during normal focus traversal, the Component
 * traversed after a focus cycle root will be the focus-cycle-root's
 * default Component to focus. This behavior can be disabled using the
 * <code>setImplicitDownCycleTraversal</code> method.
 * <p>
 * If aContainer is <a href="../../java/awt/doc-files/FocusSpec.html#FocusTraversalPolicyProviders">focus
 * traversal policy provider</a>, the focus is always transferred down-cycle.
 *
 * @param aContainer a focus cycle root of aComponent or a focus traversal policy provider
 * @param aComponent a (possibly indirect) child of aContainer, or
 *        aContainer itself
 * @return the Component that should receive the focus before aComponent,
 *         or null if no suitable Component can be found
 * @throws IllegalArgumentException if aContainer is not a focus cycle
 *         root of aComponent or a focus traversal policy provider, or if either aContainer or
 *         aComponent is null
 */
public Component getComponentBefore(Container aContainer, Component aComponent) {
    if (aContainer == null || aComponent == null) {
        throw new IllegalArgumentException("aContainer and aComponent cannot be null");
    }
    if (!aContainer.isFocusTraversalPolicyProvider() && !aContainer.isFocusCycleRoot()) {
        throw new IllegalArgumentException("aContainer should be focus cycle root or focus traversal policy provider");

    } else if (aContainer.isFocusCycleRoot() && !aComponent.isFocusCycleRoot(aContainer)) {
        throw new IllegalArgumentException("aContainer is not a focus cycle root of aComponent");
    }

    // See if the component is inside of policy provider.
    Container provider = getTopmostProvider(aContainer, aComponent);
    if (provider != null) {
        if (log.isLoggable(PlatformLogger.Level.FINE)) {
            log.fine("### Asking FTP " + provider + " for component after " + aComponent);
        }

        // FTP knows how to find component after the given. We don't.
        FocusTraversalPolicy policy = provider.getFocusTraversalPolicy();
        Component beforeComp = policy.getComponentBefore(provider, aComponent);

        // Null result means that we overstepped the limit of the FTP's cycle.
        // In that case we must quit the cycle, otherwise return the component found.
        if (beforeComp != null) {
            if (log.isLoggable(PlatformLogger.Level.FINE)) {
                log.fine("### FTP returned " + beforeComp);
            }
            return beforeComp;
        }
        aComponent = provider;

        // If the provider is traversable it's returned.
        if (accept(aComponent)) {
            return aComponent;
        }
    }

    List<Component> cycle = getFocusTraversalCycle(aContainer);

    if (log.isLoggable(PlatformLogger.Level.FINE)) {
        log.fine("### Cycle is " + cycle + ", component is " + aComponent);
    }

    int index = getComponentIndex(cycle, aComponent);

    if (index < 0) {
        if (log.isLoggable(PlatformLogger.Level.FINE)) {
            log.fine("### Didn't find component " + aComponent + " in a cycle " + aContainer);
        }
        return getLastComponent(aContainer);
    }

    Component comp;
    Component tryComp;

    for (index--; index>=0; index--) {
        comp = cycle.get(index);
        if (comp != aContainer && (tryComp = getComponentDownCycle(comp, BACKWARD_TRAVERSAL)) != null) {
            return tryComp;
        } else if (accept(comp)) {
            return comp;
        }
    }

    if (aContainer.isFocusCycleRoot()) {
        this.cachedRoot = aContainer;
        this.cachedCycle = cycle;

        comp = getLastComponent(aContainer);

        this.cachedRoot = null;
        this.cachedCycle = null;

        return comp;
    }
    return null;
}
 
Example 15
Source File: SortingFocusTraversalPolicy.java    From hottub with GNU General Public License v2.0 4 votes vote down vote up
/**
 * Returns the last Component in the traversal cycle. This method is used
 * to determine the next Component to focus when traversal wraps in the
 * reverse direction.
 *
 * @param aContainer a focus cycle root of aComponent or a focus traversal policy provider whose
 *        last Component is to be returned
 * @return the last Component in the traversal cycle of aContainer,
 *         or null if no suitable Component can be found
 * @throws IllegalArgumentException if aContainer is null
 */
public Component getLastComponent(Container aContainer) {
    List<Component> cycle;
    if (log.isLoggable(PlatformLogger.Level.FINE)) {
        log.fine("### Getting last component in " + aContainer);
    }

    if (aContainer == null) {
        throw new IllegalArgumentException("aContainer cannot be null");
    }

    if (this.cachedRoot == aContainer) {
        cycle = this.cachedCycle;
    } else {
        cycle = getFocusTraversalCycle(aContainer);
    }

    if (cycle.size() == 0) {
        if (log.isLoggable(PlatformLogger.Level.FINE)) {
            log.fine("### Cycle is empty");
        }
        return null;
    }
    if (log.isLoggable(PlatformLogger.Level.FINE)) {
        log.fine("### Cycle is " + cycle);
    }

    for (int i= cycle.size() - 1; i >= 0; i--) {
        Component comp = cycle.get(i);
        if (accept(comp)) {
            return comp;
        } else if (comp instanceof Container && comp != aContainer) {
            Container cont = (Container)comp;
            if (cont.isFocusTraversalPolicyProvider()) {
                Component retComp = cont.getFocusTraversalPolicy().getLastComponent(cont);
                if (retComp != null) {
                    return retComp;
                }
            }
        }
    }
    return null;
}
 
Example 16
Source File: SortingFocusTraversalPolicy.java    From TencentKona-8 with GNU General Public License v2.0 4 votes vote down vote up
/**
 * Returns the last Component in the traversal cycle. This method is used
 * to determine the next Component to focus when traversal wraps in the
 * reverse direction.
 *
 * @param aContainer a focus cycle root of aComponent or a focus traversal policy provider whose
 *        last Component is to be returned
 * @return the last Component in the traversal cycle of aContainer,
 *         or null if no suitable Component can be found
 * @throws IllegalArgumentException if aContainer is null
 */
public Component getLastComponent(Container aContainer) {
    List<Component> cycle;
    if (log.isLoggable(PlatformLogger.Level.FINE)) {
        log.fine("### Getting last component in " + aContainer);
    }

    if (aContainer == null) {
        throw new IllegalArgumentException("aContainer cannot be null");
    }

    if (this.cachedRoot == aContainer) {
        cycle = this.cachedCycle;
    } else {
        cycle = getFocusTraversalCycle(aContainer);
    }

    if (cycle.size() == 0) {
        if (log.isLoggable(PlatformLogger.Level.FINE)) {
            log.fine("### Cycle is empty");
        }
        return null;
    }
    if (log.isLoggable(PlatformLogger.Level.FINE)) {
        log.fine("### Cycle is " + cycle);
    }

    for (int i= cycle.size() - 1; i >= 0; i--) {
        Component comp = cycle.get(i);
        if (accept(comp)) {
            return comp;
        } else if (comp instanceof Container && comp != aContainer) {
            Container cont = (Container)comp;
            if (cont.isFocusTraversalPolicyProvider()) {
                Component retComp = cont.getFocusTraversalPolicy().getLastComponent(cont);
                if (retComp != null) {
                    return retComp;
                }
            }
        }
    }
    return null;
}
 
Example 17
Source File: SortingFocusTraversalPolicy.java    From openjdk-8 with GNU General Public License v2.0 4 votes vote down vote up
/**
 * Returns the Component that should receive the focus before aComponent.
 * aContainer must be a focus cycle root of aComponent or a focus traversal policy provider.
 * <p>
 * By default, SortingFocusTraversalPolicy implicitly transfers focus down-
 * cycle. That is, during normal focus traversal, the Component
 * traversed after a focus cycle root will be the focus-cycle-root's
 * default Component to focus. This behavior can be disabled using the
 * <code>setImplicitDownCycleTraversal</code> method.
 * <p>
 * If aContainer is <a href="../../java/awt/doc-files/FocusSpec.html#FocusTraversalPolicyProviders">focus
 * traversal policy provider</a>, the focus is always transferred down-cycle.
 *
 * @param aContainer a focus cycle root of aComponent or a focus traversal policy provider
 * @param aComponent a (possibly indirect) child of aContainer, or
 *        aContainer itself
 * @return the Component that should receive the focus before aComponent,
 *         or null if no suitable Component can be found
 * @throws IllegalArgumentException if aContainer is not a focus cycle
 *         root of aComponent or a focus traversal policy provider, or if either aContainer or
 *         aComponent is null
 */
public Component getComponentBefore(Container aContainer, Component aComponent) {
    if (aContainer == null || aComponent == null) {
        throw new IllegalArgumentException("aContainer and aComponent cannot be null");
    }
    if (!aContainer.isFocusTraversalPolicyProvider() && !aContainer.isFocusCycleRoot()) {
        throw new IllegalArgumentException("aContainer should be focus cycle root or focus traversal policy provider");

    } else if (aContainer.isFocusCycleRoot() && !aComponent.isFocusCycleRoot(aContainer)) {
        throw new IllegalArgumentException("aContainer is not a focus cycle root of aComponent");
    }

    // See if the component is inside of policy provider.
    Container provider = getTopmostProvider(aContainer, aComponent);
    if (provider != null) {
        if (log.isLoggable(PlatformLogger.Level.FINE)) {
            log.fine("### Asking FTP " + provider + " for component after " + aComponent);
        }

        // FTP knows how to find component after the given. We don't.
        FocusTraversalPolicy policy = provider.getFocusTraversalPolicy();
        Component beforeComp = policy.getComponentBefore(provider, aComponent);

        // Null result means that we overstepped the limit of the FTP's cycle.
        // In that case we must quit the cycle, otherwise return the component found.
        if (beforeComp != null) {
            if (log.isLoggable(PlatformLogger.Level.FINE)) {
                log.fine("### FTP returned " + beforeComp);
            }
            return beforeComp;
        }
        aComponent = provider;

        // If the provider is traversable it's returned.
        if (accept(aComponent)) {
            return aComponent;
        }
    }

    List<Component> cycle = getFocusTraversalCycle(aContainer);

    if (log.isLoggable(PlatformLogger.Level.FINE)) {
        log.fine("### Cycle is " + cycle + ", component is " + aComponent);
    }

    int index = getComponentIndex(cycle, aComponent);

    if (index < 0) {
        if (log.isLoggable(PlatformLogger.Level.FINE)) {
            log.fine("### Didn't find component " + aComponent + " in a cycle " + aContainer);
        }
        return getLastComponent(aContainer);
    }

    Component comp;
    Component tryComp;

    for (index--; index>=0; index--) {
        comp = cycle.get(index);
        if (comp != aContainer && (tryComp = getComponentDownCycle(comp, BACKWARD_TRAVERSAL)) != null) {
            return tryComp;
        } else if (accept(comp)) {
            return comp;
        }
    }

    if (aContainer.isFocusCycleRoot()) {
        this.cachedRoot = aContainer;
        this.cachedCycle = cycle;

        comp = getLastComponent(aContainer);

        this.cachedRoot = null;
        this.cachedCycle = null;

        return comp;
    }
    return null;
}
 
Example 18
Source File: SortingFocusTraversalPolicy.java    From openjdk-jdk9 with GNU General Public License v2.0 4 votes vote down vote up
/**
 * Returns the Component that should receive the focus before aComponent.
 * aContainer must be a focus cycle root of aComponent or a focus traversal policy provider.
 * <p>
 * By default, SortingFocusTraversalPolicy implicitly transfers focus down-
 * cycle. That is, during normal focus traversal, the Component
 * traversed after a focus cycle root will be the focus-cycle-root's
 * default Component to focus. This behavior can be disabled using the
 * <code>setImplicitDownCycleTraversal</code> method.
 * <p>
 * If aContainer is <a href="../../java/awt/doc-files/FocusSpec.html#FocusTraversalPolicyProviders">focus
 * traversal policy provider</a>, the focus is always transferred down-cycle.
 *
 * @param aContainer a focus cycle root of aComponent or a focus traversal policy provider
 * @param aComponent a (possibly indirect) child of aContainer, or
 *        aContainer itself
 * @return the Component that should receive the focus before aComponent,
 *         or null if no suitable Component can be found
 * @throws IllegalArgumentException if aContainer is not a focus cycle
 *         root of aComponent or a focus traversal policy provider, or if either aContainer or
 *         aComponent is null
 */
public Component getComponentBefore(Container aContainer, Component aComponent) {
    if (aContainer == null || aComponent == null) {
        throw new IllegalArgumentException("aContainer and aComponent cannot be null");
    }
    if (!aContainer.isFocusTraversalPolicyProvider() && !aContainer.isFocusCycleRoot()) {
        throw new IllegalArgumentException("aContainer should be focus cycle root or focus traversal policy provider");

    } else if (aContainer.isFocusCycleRoot() && !aComponent.isFocusCycleRoot(aContainer)) {
        throw new IllegalArgumentException("aContainer is not a focus cycle root of aComponent");
    }

    // See if the component is inside of policy provider.
    Container provider = getTopmostProvider(aContainer, aComponent);
    if (provider != null) {
        if (log.isLoggable(PlatformLogger.Level.FINE)) {
            log.fine("### Asking FTP " + provider + " for component after " + aComponent);
        }

        // FTP knows how to find component after the given. We don't.
        FocusTraversalPolicy policy = provider.getFocusTraversalPolicy();
        Component beforeComp = policy.getComponentBefore(provider, aComponent);

        // Null result means that we overstepped the limit of the FTP's cycle.
        // In that case we must quit the cycle, otherwise return the component found.
        if (beforeComp != null) {
            if (log.isLoggable(PlatformLogger.Level.FINE)) {
                log.fine("### FTP returned " + beforeComp);
            }
            return beforeComp;
        }
        aComponent = provider;

        // If the provider is traversable it's returned.
        if (accept(aComponent)) {
            return aComponent;
        }
    }

    List<Component> cycle = getFocusTraversalCycle(aContainer);

    if (log.isLoggable(PlatformLogger.Level.FINE)) {
        log.fine("### Cycle is " + cycle + ", component is " + aComponent);
    }

    int index = getComponentIndex(cycle, aComponent);

    if (index < 0) {
        if (log.isLoggable(PlatformLogger.Level.FINE)) {
            log.fine("### Didn't find component " + aComponent + " in a cycle " + aContainer);
        }
        return getLastComponent(aContainer);
    }

    Component comp;
    Component tryComp;

    for (index--; index>=0; index--) {
        comp = cycle.get(index);
        if (comp != aContainer && (tryComp = getComponentDownCycle(comp, BACKWARD_TRAVERSAL)) != null) {
            return tryComp;
        } else if (accept(comp)) {
            return comp;
        }
    }

    if (aContainer.isFocusCycleRoot()) {
        this.cachedRoot = aContainer;
        this.cachedCycle = cycle;

        comp = getLastComponent(aContainer);

        this.cachedRoot = null;
        this.cachedCycle = null;

        return comp;
    }
    return null;
}
 
Example 19
Source File: SortingFocusTraversalPolicy.java    From openjdk-jdk8u-backup with GNU General Public License v2.0 4 votes vote down vote up
/**
 * Returns the Component that should receive the focus before aComponent.
 * aContainer must be a focus cycle root of aComponent or a focus traversal policy provider.
 * <p>
 * By default, SortingFocusTraversalPolicy implicitly transfers focus down-
 * cycle. That is, during normal focus traversal, the Component
 * traversed after a focus cycle root will be the focus-cycle-root's
 * default Component to focus. This behavior can be disabled using the
 * <code>setImplicitDownCycleTraversal</code> method.
 * <p>
 * If aContainer is <a href="../../java/awt/doc-files/FocusSpec.html#FocusTraversalPolicyProviders">focus
 * traversal policy provider</a>, the focus is always transferred down-cycle.
 *
 * @param aContainer a focus cycle root of aComponent or a focus traversal policy provider
 * @param aComponent a (possibly indirect) child of aContainer, or
 *        aContainer itself
 * @return the Component that should receive the focus before aComponent,
 *         or null if no suitable Component can be found
 * @throws IllegalArgumentException if aContainer is not a focus cycle
 *         root of aComponent or a focus traversal policy provider, or if either aContainer or
 *         aComponent is null
 */
public Component getComponentBefore(Container aContainer, Component aComponent) {
    if (aContainer == null || aComponent == null) {
        throw new IllegalArgumentException("aContainer and aComponent cannot be null");
    }
    if (!aContainer.isFocusTraversalPolicyProvider() && !aContainer.isFocusCycleRoot()) {
        throw new IllegalArgumentException("aContainer should be focus cycle root or focus traversal policy provider");

    } else if (aContainer.isFocusCycleRoot() && !aComponent.isFocusCycleRoot(aContainer)) {
        throw new IllegalArgumentException("aContainer is not a focus cycle root of aComponent");
    }

    // See if the component is inside of policy provider.
    Container provider = getTopmostProvider(aContainer, aComponent);
    if (provider != null) {
        if (log.isLoggable(PlatformLogger.Level.FINE)) {
            log.fine("### Asking FTP " + provider + " for component after " + aComponent);
        }

        // FTP knows how to find component after the given. We don't.
        FocusTraversalPolicy policy = provider.getFocusTraversalPolicy();
        Component beforeComp = policy.getComponentBefore(provider, aComponent);

        // Null result means that we overstepped the limit of the FTP's cycle.
        // In that case we must quit the cycle, otherwise return the component found.
        if (beforeComp != null) {
            if (log.isLoggable(PlatformLogger.Level.FINE)) {
                log.fine("### FTP returned " + beforeComp);
            }
            return beforeComp;
        }
        aComponent = provider;

        // If the provider is traversable it's returned.
        if (accept(aComponent)) {
            return aComponent;
        }
    }

    List<Component> cycle = getFocusTraversalCycle(aContainer);

    if (log.isLoggable(PlatformLogger.Level.FINE)) {
        log.fine("### Cycle is " + cycle + ", component is " + aComponent);
    }

    int index = getComponentIndex(cycle, aComponent);

    if (index < 0) {
        if (log.isLoggable(PlatformLogger.Level.FINE)) {
            log.fine("### Didn't find component " + aComponent + " in a cycle " + aContainer);
        }
        return getLastComponent(aContainer);
    }

    Component comp;
    Component tryComp;

    for (index--; index>=0; index--) {
        comp = cycle.get(index);
        if (comp != aContainer && (tryComp = getComponentDownCycle(comp, BACKWARD_TRAVERSAL)) != null) {
            return tryComp;
        } else if (accept(comp)) {
            return comp;
        }
    }

    if (aContainer.isFocusCycleRoot()) {
        this.cachedRoot = aContainer;
        this.cachedCycle = cycle;

        comp = getLastComponent(aContainer);

        this.cachedRoot = null;
        this.cachedCycle = null;

        return comp;
    }
    return null;
}
 
Example 20
Source File: SortingFocusTraversalPolicy.java    From Bytecoder with Apache License 2.0 4 votes vote down vote up
/**
 * Returns the Component that should receive the focus before aComponent.
 * aContainer must be a focus cycle root of aComponent or a focus traversal policy provider.
 * <p>
 * By default, SortingFocusTraversalPolicy implicitly transfers focus down-
 * cycle. That is, during normal focus traversal, the Component
 * traversed after a focus cycle root will be the focus-cycle-root's
 * default Component to focus. This behavior can be disabled using the
 * <code>setImplicitDownCycleTraversal</code> method.
 * <p>
 * If aContainer is <a href="../../java/awt/doc-files/FocusSpec.html#FocusTraversalPolicyProviders">focus
 * traversal policy provider</a>, the focus is always transferred down-cycle.
 *
 * @param aContainer a focus cycle root of aComponent or a focus traversal policy provider
 * @param aComponent a (possibly indirect) child of aContainer, or
 *        aContainer itself
 * @return the Component that should receive the focus before aComponent,
 *         or null if no suitable Component can be found
 * @throws IllegalArgumentException if aContainer is not a focus cycle
 *         root of aComponent or a focus traversal policy provider, or if either aContainer or
 *         aComponent is null
 */
public Component getComponentBefore(Container aContainer, Component aComponent) {
    if (aContainer == null || aComponent == null) {
        throw new IllegalArgumentException("aContainer and aComponent cannot be null");
    }
    if (!aContainer.isFocusTraversalPolicyProvider() && !aContainer.isFocusCycleRoot()) {
        throw new IllegalArgumentException("aContainer should be focus cycle root or focus traversal policy provider");

    } else if (aContainer.isFocusCycleRoot() && !aComponent.isFocusCycleRoot(aContainer)) {
        throw new IllegalArgumentException("aContainer is not a focus cycle root of aComponent");
    }

    // See if the component is inside of policy provider.
    Container provider = getTopmostProvider(aContainer, aComponent);
    if (provider != null) {
        if (log.isLoggable(PlatformLogger.Level.FINE)) {
            log.fine("### Asking FTP " + provider + " for component after " + aComponent);
        }

        // FTP knows how to find component after the given. We don't.
        FocusTraversalPolicy policy = provider.getFocusTraversalPolicy();
        Component beforeComp = policy.getComponentBefore(provider, aComponent);

        // Null result means that we overstepped the limit of the FTP's cycle.
        // In that case we must quit the cycle, otherwise return the component found.
        if (beforeComp != null) {
            if (log.isLoggable(PlatformLogger.Level.FINE)) {
                log.fine("### FTP returned " + beforeComp);
            }
            return beforeComp;
        }
        aComponent = provider;

        // If the provider is traversable it's returned.
        if (accept(aComponent)) {
            return aComponent;
        }
    }

    List<Component> cycle = getFocusTraversalCycle(aContainer);

    if (log.isLoggable(PlatformLogger.Level.FINE)) {
        log.fine("### Cycle is " + cycle + ", component is " + aComponent);
    }

    int index = getComponentIndex(cycle, aComponent);

    if (index < 0) {
        if (log.isLoggable(PlatformLogger.Level.FINE)) {
            log.fine("### Didn't find component " + aComponent + " in a cycle " + aContainer);
        }
        return getLastComponent(aContainer);
    }

    Component comp;
    Component tryComp;

    for (index--; index>=0; index--) {
        comp = cycle.get(index);
        if (comp != aContainer && (tryComp = getComponentDownCycle(comp, BACKWARD_TRAVERSAL)) != null) {
            return tryComp;
        } else if (accept(comp)) {
            return comp;
        }
    }

    if (aContainer.isFocusCycleRoot()) {
        this.cachedRoot = aContainer;
        this.cachedCycle = cycle;

        comp = getLastComponent(aContainer);

        this.cachedRoot = null;
        this.cachedCycle = null;

        return comp;
    }
    return null;
}