Improve styling of the link editor (#110)

* Improve styling of the link editor

* Use splitpanel instead of boxpanel

* update snapshots

Author: martinRenou

Diff for: src/linkPanel/linkEditor.ts

@@ -1,4 +1,4 @@
-import { BoxPanel, Widget } from '@lumino/widgets';
+import { SplitPanel, Widget } from '@lumino/widgets';
 
 import { IGlueSessionSharedModel } from '../types';
 import { LinkEditorModel } from './model';
@@ -10,9 +10,9 @@ import { Message } from '@lumino/messaging';
 /**
  * The link editor widget.
  */
-export class LinkEditor extends BoxPanel {
+export class LinkEditor extends SplitPanel {
   constructor(options: LinkWidget.IOptions) {
-    super({ direction: 'left-to-right' });
+    super({});
     this._sharedModel = options.sharedModel;
     this.addClass('glue-linkEditor');
     this.title.label = 'Link Data';
@@ -31,8 +31,8 @@ export class LinkEditor extends BoxPanel {
     this.addWidget(linking);
     this.addWidget(summary);
 
-    BoxPanel.setStretch(linking, 3);
-    BoxPanel.setStretch(summary, 2);
+    SplitPanel.setStretch(linking, 3);
+    SplitPanel.setStretch(summary, 2);
   }
 
   get sharedModel(): IGlueSessionSharedModel {

Diff for: style/base.css

@@ -213,6 +213,10 @@
   flex-direction: row-reverse;
 }
 
+.glue-Session-panel {
+  background-color: var(--jp-layout-color2);
+}
+
 .glue-LinkEditor-deleteButton:hover {
   background-color: none !important;
 }
@@ -259,6 +263,10 @@
   width: 40%;
 }
 
+.glue-LinkEditor-identity {
+  background-color: var(--jp-layout-color0);
+}
+
 .glue-LinkEditor-identity table tr td:last-child {
   text-align: right;
 }
@@ -284,21 +292,14 @@
   flex-direction: column;
 }
 
-.glue-LinkEditor-widget:first-child {
-  border-right: solid 2px var(--jp-layout-color2);
-}
-
-.glue-LinkEditor-widget:last-child {
-  border-left: solid 2px var(--jp-layout-color2);
-}
-
 .glue-LinkEditor-widget > :last-child {
   flex-grow: 1;
 }
 
 .glue-LinkEditor-header {
   width: 100%;
-  background-color: var(--jp-layout-color3);
+  background-color: var(--jp-layout-color0);
+  border-bottom: solid 3px var(--jp-layout-color2);
   display: flex;
   align-items: center;
 }
@@ -339,6 +340,7 @@
 
 .glue-LinkEditor-linkingDatasetsPanel {
   width: 30%;
+  background-color: var(--jp-layout-color0);
 }
 
 .glue-LinkEditor-linkingAttributesPanel {
@@ -347,11 +349,11 @@
 }
 
 .glue-LinkEditor-linkingAttributesPanel.firstAttributePanel {
-  border-right: solid var(--jp-toolbar-border-color);
+  border-right: 1px solid var(--jp-toolbar-border-color);
 }
 
 .glue-LinkEditor-linkingAttributesPanel.secondAttributePanel {
-  border-left: solid var(--jp-toolbar-border-color);
+  border-left: 1px solid var(--jp-toolbar-border-color);
 }
 
 .glue-LinkEditor-summaryHeader {