From b9299aa50ed203b2b8041b0d9a7573865bb71da9 Mon Sep 17 00:00:00 2001
From: Dolph Flynn <96876199+DolphFlynn@users.noreply.github.com>
Date: Sat, 20 Jan 2024 18:31:05 +0000
Subject: [PATCH] Modify distribution of space between split panes within
 EditorView.

---
 .../jwteditor/view/editor/EditorView.form     |  4 ++--
 .../jwteditor/view/editor/EditorView.java     | 24 +++++++++++++++++++
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/src/main/java/com/blackberry/jwteditor/view/editor/EditorView.form b/src/main/java/com/blackberry/jwteditor/view/editor/EditorView.form
index 97f2b05..2d3cbc6 100644
--- a/src/main/java/com/blackberry/jwteditor/view/editor/EditorView.form
+++ b/src/main/java/com/blackberry/jwteditor/view/editor/EditorView.form
@@ -42,7 +42,7 @@
               </component>
             </children>
           </grid>
-          <splitpane id="d5f0c">
+          <splitpane id="d5f0c" binding="upperSplitPane">
             <constraints>
               <grid row="1" column="0" row-span="1" col-span="1" vsize-policy="3" hsize-policy="3" anchor="0" fill="3" indent="0" use-parent-layout="false">
                 <preferred-size width="200" height="200"/>
@@ -136,7 +136,7 @@
                       <size top="5" left="0" bottom="0" right="0"/>
                     </border>
                     <children>
-                      <splitpane id="8027f">
+                      <splitpane id="8027f" binding="lowerSplitPane">
                         <constraints>
                           <grid row="0" column="0" row-span="1" col-span="1" vsize-policy="3" hsize-policy="3" anchor="0" fill="3" indent="0" use-parent-layout="false">
                             <preferred-size width="200" height="200"/>
diff --git a/src/main/java/com/blackberry/jwteditor/view/editor/EditorView.java b/src/main/java/com/blackberry/jwteditor/view/editor/EditorView.java
index 0e1dfe1..34c71d2 100644
--- a/src/main/java/com/blackberry/jwteditor/view/editor/EditorView.java
+++ b/src/main/java/com/blackberry/jwteditor/view/editor/EditorView.java
@@ -39,9 +39,13 @@
 import javax.swing.event.DocumentEvent;
 import javax.swing.event.DocumentListener;
 import java.awt.*;
+import java.awt.event.HierarchyEvent;
+import java.awt.event.HierarchyListener;
 import java.util.List;
 
 import static java.awt.Color.RED;
+import static java.awt.EventQueue.invokeLater;
+import static java.awt.event.HierarchyEvent.SHOWING_CHANGED;
 import static org.exbin.deltahex.EditationAllowed.ALLOWED;
 import static org.exbin.deltahex.EditationAllowed.READ_ONLY;
 
@@ -86,6 +90,8 @@ public abstract class EditorView implements ExtensionProvidedEditor {
     private JCheckBox checkBoxJWEHeaderCompactJSON;
     private JButton buttonJWSPayloadFormatJSON;
     private JCheckBox checkBoxJWSPayloadCompactJSON;
+    private JSplitPane upperSplitPane;
+    private JSplitPane lowerSplitPane;
 
     private CodeArea codeAreaSignature;
     private CodeArea codeAreaEncryptedKey;
@@ -107,6 +113,8 @@ public abstract class EditorView implements ExtensionProvidedEditor {
         this.isProVersion = isProVersion;
         this.presenter = new EditorPresenter(this, collaboratorPayloadGenerator, actionListenerFactory, presenters);
 
+        panel.addHierarchyListener(new ResizeSplitPanesOnFirstRenderHierarchyListener());
+
         // Event handler for Header / JWS payload change events
         DocumentListener documentListener = new DocumentListener() {
             @Override
@@ -537,4 +545,20 @@ private void createUIComponents() {
         textAreaJWSHeader = rstaFactory.buildDefaultTextArea();
         textAreaPayload = rstaFactory.buildDefaultTextArea();
     }
+
+    private class ResizeSplitPanesOnFirstRenderHierarchyListener implements HierarchyListener {
+        @Override
+        public void hierarchyChanged(HierarchyEvent e) {
+            if (e.getChangeFlags() != SHOWING_CHANGED || !e.getComponent().isShowing()) {
+                return;
+            }
+
+            invokeLater(() -> {
+                        upperSplitPane.setDividerLocation(0.25);
+                        lowerSplitPane.setDividerLocation(0.75);
+                    });
+
+            panel.removeHierarchyListener(this);
+        }
+    }
 }