Make HomeView widget more responsive depending on its current size

data/widgets/home_view.xml

@@ -2,7 +2,7 @@
 <!-- Copyright (C) 2001-2015 by David Capello -->
 <gui>
   <vbox noborders="true" id="home_view" border="4" childspacing="2" expansive="true">
-    <hbox noborders="true">
+    <hbox noborders="true" id="header_placeholder">
       <image file="icons/ase48.png" align="center" />
       <vbox border="4" childspacing="4">
         <link id="new_file" text="New File..." style="workspace_link" />
@@ -13,17 +13,22 @@
         <link id="check_update" text="" style="workspace_link" />
       </vbox>
     </hbox>
-    <hbox noborders="true" expansive="true" homogeneous="true" childspacing="2">
-      <vbox noborders="true" childspacing="2">
-        <label text="Recent files:" style="workspace_label" />
-        <view id="files_view" expansive="true" style="workspace_view" />
-        <label text="Recent folders:" style="workspace_label" />
-        <view id="folders_view" expansive="true" style="workspace_view" />
-      </vbox>
-      <vbox noborders="true" childspacing="2">
+    <splitter horizontal="true" noborders="true" childspacing="2"
+              expansive="true" by="percetage" position="50" >
+      <splitter vertical="true" noborders="true" childspacing="2">
+        <vbox id="files_placeholder">
+          <label text="Recent files:" style="workspace_label" />
+          <view id="files_view" expansive="true" style="workspace_view" />
+        </vbox>
+        <vbox id="folders_placeholder">
+          <label text="Recent folders:" style="workspace_label" />
+          <view id="folders_view" expansive="true" style="workspace_view" />
+        </vbox>
+      </splitter>
+      <vbox id="news_placeholder" noborders="true" childspacing="2">
         <label text="News:" style="workspace_label" />
         <view id="news_view" expansive="true" style="workspace_view" />
       </vbox>
-    </hbox>
+    </splitter>
   </vbox>
 </gui>

src/app/ui/home_view.cpp

@@ -23,6 +23,7 @@
 #include "base/bind.h"
 #include "base/exception.h"
 #include "ui/label.h"
+#include "ui/resize_event.h"
 #include "ui/system.h"
 #include "ui/textbox.h"
 #include "ui/view.h"
@@ -107,6 +108,15 @@ void HomeView::onOpenFile()
   UIContext::instance()->executeCommand(command);
 }
 
+void HomeView::onResize(ui::ResizeEvent& ev)
+{
+  headerPlaceholder()->setVisible(ev.getBounds().h > 200*ui::guiscale());
+  foldersPlaceholder()->setVisible(ev.getBounds().h > 150*ui::guiscale());
+  newsPlaceholder()->setVisible(ev.getBounds().w > 200*ui::guiscale());
+
+  ui::VBox::onResize(ev);
+}
+
 void HomeView::onCheckingUpdates()
 {
   checkUpdate()->setText("Checking Updates...");

src/app/ui/home_view.h

@@ -50,6 +50,7 @@ namespace app {
     void onWorkspaceViewSelected() override;
 
   protected:
+    void onResize(ui::ResizeEvent& ev) override;
 #ifdef ENABLE_UPDATER
     // CheckUpdateDelegate impl
     void onCheckingUpdates() override;