| <?xml version="1.0" encoding="UTF-8"?> |
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| |
| <document id="split-panes"> |
| <properties> |
| <title>Split Panes</title> |
| <explore>SplitPane</explore> |
| </properties> |
| |
| <body> |
| <p> |
| Split panes provide a draggable divider, known as a "splitter", between two components, |
| allowing a user to dynamically change the size of each component. The location of the |
| splitter is expressed in terms of a percentage value (<tt>0.0</tt> to <tt>1.0</tt>) |
| called the "split ratio", which determines how much space is allocated to each |
| component. |
| </p> |
| |
| <p> |
| Split panes also have an orientation, which dictates whether the two components sit |
| side by side or one on top of another. A horizontally oriented split pane has a left |
| region and a right region; a vertically oriented split pane has a top region and a |
| bottom region. Since orientation is a runtime property of <tt>SplitPane</tt>, the |
| regions are referred to generically as the "top/left" region and the "bottom/right" |
| region and are specified using the <tt>SplitPane.Region</tt> enum. |
| </p> |
| |
| <p> |
| When a split pane is resized, the caller can control how the change should affect the |
| sizes of the two components by setting the split pane's "resize mode" and its "primary |
| region". The resize mode can be set to either maintain the existing split ratio |
| (allocate space according to existing allocation percentages) or to maintain the |
| existing size of the primary region. |
| </p> |
| |
| <p> |
| Finally, a split pane may be locked, which will prevent the user from dragging the |
| splitter. Note that callers will still be able to programatically adjust the split |
| ratio. |
| </p> |
| |
| <p> |
| The following example shows a simple split pane that can be used to control the scale |
| of an image view. You can change the orientation of the split pane by using the |
| associated radio buttons. It also highlights the "useShadow" style, which is one of the |
| styles supported by the Terra there's implementation of the split pane skin. |
| </p> |
| |
| <application class="org.apache.pivot.wtk.ScriptApplication" |
| width="360" height="240"> |
| <libraries> |
| <library>core</library> |
| <library>wtk</library> |
| <library>wtk-terra</library> |
| <library>tutorials</library> |
| </libraries> |
| <startup-properties> |
| <src>/org/apache/pivot/tutorials/layout/split_panes.bxml</src> |
| </startup-properties> |
| </application> |
| |
| <p> |
| The BXML for this example is shown below: |
| </p> |
| |
| <source type="xml" location="org/apache/pivot/tutorials/layout/split_panes.bxml"> |
| <![CDATA[ |
| <Window title="Split Panes" maximized="true" |
| WindowStateListener.windowOpened="init();" |
| xmlns:bxml="http://pivot.apache.org/bxml" |
| xmlns="org.apache.pivot.wtk"> |
| <bxml:script> |
| function init() { |
| orientation.setSelection(horizontalOrientationButton); |
| } |
| </bxml:script> |
| |
| <SplitPane bxml:id="splitPane" orientation="horizontal" splitRatio="0.6"> |
| <left> |
| <Border styles="{padding:6}"> |
| <ImageView image="/org/apache/pivot/tutorials/IMG_0725_2.jpg" |
| styles="{fill:true}"/> |
| </Border> |
| </left> |
| <right> |
| <Border> |
| <BoxPane orientation="vertical" styles="{padding:6, spacing:8, fill:true}"> |
| <bxml:define> |
| <ButtonGroup bxml:id="orientation"> |
| <buttonGroupListeners> |
| importClass(org.apache.pivot.wtk.Orientation); |
| |
| function selectionChanged(buttonGroup, previousSelection) { |
| var selection = buttonGroup.getSelection(); |
| if (selection == horizontalOrientationButton) { |
| splitPane.setOrientation(Orientation.HORIZONTAL); |
| } else { |
| splitPane.setOrientation(Orientation.VERTICAL); |
| } |
| } |
| </buttonGroupListeners> |
| </ButtonGroup> |
| </bxml:define> |
| |
| <Label text="Orientation" styles="{font:{bold:true}}"/> |
| <RadioButton bxml:id="horizontalOrientationButton" |
| buttonData="Horizontal" buttonGroup="$orientation"/> |
| <RadioButton bxml:id="verticalOrientationButton" |
| buttonData="Vertical" buttonGroup="$orientation"/> |
| |
| <Separator/> |
| |
| <Checkbox buttonData="Use Shadow"> |
| <buttonStateListeners> |
| function stateChanged(button, previousState) { |
| splitPane.getStyles().put("useShadow", button.isSelected()); |
| } |
| </buttonStateListeners> |
| </Checkbox> |
| </BoxPane> |
| </Border> |
| </right> |
| </SplitPane> |
| </Window> |
| ]]> |
| </source> |
| |
| <p> |
| Since this example is written entirely in BXML and script, there is no associated Java |
| source. |
| </p> |
| </body> |
| </document> |