SplitPanel − a container divided into two areas by a movable separator.

gui splitPanel

Component XML-name: split.

An example description of a split panel in a screen XML-descriptor:

<split orientation="horizontal" pos="30" width="100%" height="100%">
    <vbox margin="true" spacing="true">
        <dateField dataContainer="orderDc" property="date" caption="Date"/>
        <lookupField dataContainer="orderDc" property="customer" optionsContainer="customersDc" caption="Customer"/>
    <vbox margin="true" spacing="true">
        <textField dataContainer="orderDc" property="amount" caption="Amount"/>

split container must contain two nested containers or components. They will be displayed on both sides of the separator.

split attributes:

  • dockable - enables or disables the SplitPanel dock button, the default value is false.

    gui SplitPanel dockable

    Docking is available only for horizontally-oriented SplitPanel.

  • dockMode - defines the docking direction. Possible values: LEFT or RIGHT.

    <split orientation="horizontal"
  • minSplitPosition, maxSplitPosition - defines a range of the available position of the split which can be set in pixels or percents.

    For example, you can restrict moving the splitter between 100 and 300 pixels from the left side of the component as follows:

    <split id="splitPanel" maxSplitPosition="300px" minSplitPosition="100px" width="100%" height="100%">
        <vbox margin="true" spacing="true">
            <button caption="Button 1"/>
            <button caption="Button 2"/>
        <vbox margin="true" spacing="true">
            <button caption="Button 4"/>
            <button caption="Button 5"/>

    If you want to set the range programmatically, specify a unit of value with Component.UNITS_PIXELS or Component.UNITS_PERCENTAGE:

    splitPanel.setMinSplitPosition(100, Component.UNITS_PIXELS);
    splitPanel.setMaxSplitPosition(300, Component.UNITS_PIXELS);
  • orientation – defines component orientation. horizontal – nested components are placed horizontally, vertical – they are placed vertically.

  • pos – an integer number defining percentage of the first component area compared to the second one. For example, pos="30" means that the areas ration is 30/70. By default the areas are divided 50/50.

  • reversePosition - indicates that the pos attribute specifies a position of the splitter from the opposite side of the component.

  • If the locked attribute is set to true, users are unable to change the separator position.

  • The stylename attribute with the large value makes the split handle wider.


SplitPanel methods:

  • You can get a position of the splitter using the getSplitPosition() method.

  • The events of moving the splitter can be intercepted with the help of PositionUpdateListener. The origin of the SplitPositionChangeEvent can be tracked using isUserOriginated() method.

  • If you need to get a unit of splitter position, use getSplitPositionUnit() method. It will return Component.UNITS_PIXELS or Component.UNITS_PERCENTAGE.

  • isSplitPositionReversed() returns true if position is set from the opposite side of the component.

The appearance of the SplitPanel component can be customized using SCSS variables with $cuba-splitpanel-* prefix. You can change these variables in the visual editor after creating a theme extension or a custom theme.