Ticket #4123: drivesetupdisablebutton-v2.patch

src/add-ons/disk_systems/bfs/InitializeParameterEditor.cpp

@@ -24 +24 @@
 
 
 static uint32 MSG_BLOCK_SIZE = 'blsz';
+static uint32 MSG_NAME_CHANGED = 'nmch';
 
 
 InitializeBFSEditor::InitializeBFSEditor()
@@ -95 +96 @@
 InitializeBFSEditor::_CreateViewControls()
 {
     fNameTC = new BTextControl("Name:", "Haiku", NULL);
+    fNameTC->SetModificationMessage(new BMessage(MSG_NAME_CHANGED));
     // TODO find out what is the max length for this specific FS partition name
     fNameTC->TextView()->SetMaxBytes(31);
 

src/apps/drivesetup/InitParamsPanel.cpp

@@ -20 +20 @@
 #include <Message.h>
 #include <MessageFilter.h>
 #include <String.h>
+#include <TextControl.h>
 
 
 #define TR_CONTEXT "InitParamsPanel"
@@ -70 +71 @@
 enum {
     MSG_OK                      = 'okok',
     MSG_CANCEL                  = 'cncl',
-    MSG_BLOCK_SIZE              = 'blsz'
+    MSG_NAME_CHANGED            = 'nmch'
 };
 
 
@@ -87 +88 @@
 {
     AddCommonFilter(fEscapeFilter);
 
-    BButton* okButton = new BButton(TR("Initialize"), new BMessage(MSG_OK));
+    fOkButton = new BButton(TR("Initialize"), new BMessage(MSG_OK));
 
     partition->GetInitializationParameterEditor(diskSystem.String(),
         &fEditor);
@@ -99 +100 @@
         .AddGroup(B_HORIZONTAL, spacing)
             .AddGlue()
             .Add(new BButton(TR("Cancel"), new BMessage(MSG_CANCEL)))
-            .Add(okButton)
+            .Add(fOkButton)
         .End()
         .SetInsets(spacing, spacing, spacing, spacing)
     );
 
-    SetDefaultButton(okButton);
+    SetDefaultButton(fOkButton);
 
     // If the partition had a previous name, set to that name.
     BString name = partition->ContentName();
@@ -145 +146 @@
             release_sem(fExitSemaphore);
             break;
 
+        case MSG_NAME_CHANGED:
+            // message comes from fEditor's BTextControl
+            BTextControl* control;
+            if (message->FindPointer("source", (void**)&control) != B_OK)
+                break;
+            if (control->TextView()->TextLength() == 0
+                && fOkButton->IsEnabled())
+                fOkButton->SetEnabled(false);
+            else if (control->TextView()->TextLength() > 0
+                && !fOkButton->IsEnabled())
+                fOkButton->SetEnabled(true);
+            break;
+
         default:
             BWindow::MessageReceived(message);
     }

src/apps/drivesetup/InitParamsPanel.h

@@ -36 +36 @@
             EscapeFilter*       fEscapeFilter;
             sem_id              fExitSemaphore;
             BWindow*            fWindow;
+            BButton*            fOkButton;
             int32               fReturnValue;
 
             BPartitionParameterEditor*  fEditor;