Example usage for com.vaadin.ui AbstractOrderedLayout getComponentIndex

Introduction

In this page you can find the example usage for com.vaadin.ui AbstractOrderedLayout getComponentIndex.

Prototype

public int getComponentIndex(Component component) 

Source Link

Document

Returns the index of the given component.

Usage

From source file:com.haulmont.cuba.web.widgets.addons.dragdroplayouts.drophandlers.DefaultHorizontalLayoutDropHandler.java

License:Apache License

/**
 * Called when a component changed location within the layout
 * //  ww  w  .  j  a  va2 s  .  c  o  m
 * @param event
 *            The drag and drop event
 */
@Override
protected void handleComponentReordering(DragAndDropEvent event) {
    // Component re-ordering
    LayoutBoundTransferable transferable = (LayoutBoundTransferable) event.getTransferable();
    HorizontalLayoutTargetDetails details = (HorizontalLayoutTargetDetails) event.getTargetDetails();
    AbstractOrderedLayout layout = (AbstractOrderedLayout) details.getTarget();
    Component comp = transferable.getComponent();
    int idx = details.getOverIndex();
    int oldIndex = layout.getComponentIndex(comp);

    if (idx == oldIndex) {
        // Index did not change
        return;
    }

    // Detach
    layout.removeComponent(comp);

    // Account for detachment if new index is bigger then old index
    if (idx > oldIndex) {
        idx--;
    }

    // Increase index if component is dropped after or above a previous
    // component
    HorizontalDropLocation loc = details.getDropLocation();
    if (loc == HorizontalDropLocation.CENTER || loc == HorizontalDropLocation.RIGHT) {
        idx++;
    }

    // Add component
    if (idx >= 0) {
        layout.addComponent(comp, idx);
    } else {
        layout.addComponent(comp, 0);
    }

    // Add component alignment if given
    if (dropAlignment != null) {
        layout.setComponentAlignment(comp, dropAlignment);
    }
}

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From source file:com.haulmont.cuba.web.widgets.addons.dragdroplayouts.drophandlers.DefaultVerticalLayoutDropHandler.java

License:Apache License

/**
 * Called when a component changed location within the layout
 * /*w w  w.j a va 2  s .c  o  m*/
 * @param event
 *            The drag and drop event
 */
@Override
protected void handleComponentReordering(DragAndDropEvent event) {
    // Component re-ordering
    LayoutBoundTransferable transferable = (LayoutBoundTransferable) event.getTransferable();
    VerticalLayoutTargetDetails details = (VerticalLayoutTargetDetails) event.getTargetDetails();
    AbstractOrderedLayout layout = (AbstractOrderedLayout) details.getTarget();
    Component comp = transferable.getComponent();
    int idx = details.getOverIndex();
    int oldIndex = layout.getComponentIndex(comp);

    if (idx == oldIndex) {
        // Index did not change
        return;
    }

    // Detach
    layout.removeComponent(comp);

    // Account for detachment if new index is bigger then old index
    if (idx > oldIndex) {
        idx--;
    }

    // Increase index if component is dropped after or above a previous
    // component
    VerticalDropLocation loc = details.getDropLocation();
    if (loc == VerticalDropLocation.MIDDLE || loc == VerticalDropLocation.BOTTOM) {
        idx++;
    }

    // Add component
    if (idx >= 0) {
        layout.addComponent(comp, idx);
    } else {
        layout.addComponent(comp);
    }

    // Add component alignment if given
    if (dropAlignment != null) {
        layout.setComponentAlignment(comp, dropAlignment);
    }

}

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