Migrate Screen Setup Wizard to external application.

This sidesteps the issue of trying to display the corner arrows outside
the current extents of the UI by starting up an entirely new instance
and forcing it to full screen. The arrows are additionally replaced by
the theme's preview image, to more clearly exhibit the final appearance.

There are some issues and potential usability concerns that still need
to be addressed.
* The preview image repositions, but does not properly scale.
* There may need to be indicators to show what corner is currently used.
* The network control interfaces are not available.

This changeset includes a revision bump, and will require any theme with
a custom appear-ui.xml to be updated.

mythtv/libs/libmythbase/mythcorecontext.h

@@ -29,6 +29,7 @@
 #define MYTH_APPNAME_MYTHMETADATALOOKUP "mythmetadatalookup"
 #define MYTH_APPNAME_MYTHUTIL "mythutil"
 #define MYTH_APPNAME_MYTHLOGSERVER "mythlogserver"
+#define MYTH_APPNAME_MYTHSCREENWIZARD "mythscreenwizard"
 
 class MDBManager;
 class MythCoreContextPrivate;

mythtv/libs/libmythbase/mythversion.h

@@ -12,7 +12,7 @@
 /// Update this whenever the plug-in API changes.
 /// Including changes in the libmythbase, libmyth, libmythtv, libmythav* and
 /// libmythui class methods used by plug-ins.
-#define MYTH_BINARY_VERSION "0.27.20130127-1"
+#define MYTH_BINARY_VERSION "0.27.20130129-1"
 
 /** \brief Increment this whenever the MythTV network protocol changes.
  *

mythtv/programs/mythfrontend/main.cpp

@@ -68,7 +68,6 @@ using namespace std;
 #include "myththemedmenu.h"
 #include "mediarenderer.h"
 #include "mythmainwindow.h"
-#include "screenwizard.h"
 #include "mythcontrols.h"
 #include "mythuihelper.h"
 #include "mythdirs.h"
@@ -292,18 +291,41 @@ namespace
 
 static void startAppearWiz(void)
 {
-    MythScreenStack *mainStack = GetMythMainWindow()->GetMainStack();
+    int curX = gCoreContext->GetNumSetting("GuiOffsetX", 0);
+    int curY = gCoreContext->GetNumSetting("GuiOffsetY", 0);
+    int curW = gCoreContext->GetNumSetting("GuiWidth", 0);
+    int curH = gCoreContext->GetNumSetting("GuiHeight", 0);
+
+    MythSystem *wizard = new MythSystem(
+                    GetInstallPrefix() + "/bin/mythscreenwizard",
+                    QStringList(),
+                    kMSNoRunShell | kMSDisableUDPListener | kMSPropagateLogs);
+    wizard->Run();
+
+    bool reload = false;
+
+    if (!wizard->Wait())
+    {
+        // no reported errors, check for changed geometry parameters
+        gCoreContext->ClearSettingsCache("GuiOffsetX");
+        gCoreContext->ClearSettingsCache("GuiOffsetY");
+        gCoreContext->ClearSettingsCache("GuiWidth");
+        gCoreContext->ClearSettingsCache("GuiHeight");
+
+        if ((curX != gCoreContext->GetNumSetting("GuiOffsetX", 0)) ||
+            (curY != gCoreContext->GetNumSetting("GuiOffsetY", 0)) ||
+            (curW != gCoreContext->GetNumSetting("GuiWidth", 0)) ||
+            (curH != gCoreContext->GetNumSetting("GuiHeight", 0)))
+                reload = true;
+    }
 
-    ScreenWizard *screenwizard = new ScreenWizard(mainStack,
-                                                        "screenwizard");
+    delete wizard;
+    wizard = NULL;
 
-    if (screenwizard->Create())
-        mainStack->AddScreen(screenwizard);
-    else
-        delete screenwizard;
+    if (reload)
+        GetMythMainWindow()->JumpTo("Reload Theme");
 }
 
-
 static void startKeysSetup()
 {
     MythScreenStack *mainStack = GetMythMainWindow()->GetMainStack();
@@ -864,7 +886,7 @@ static void TVMenuCallback(void *data, QString &selection)
     }
     else if (sel == "screensetupwizard")
     {
-       startAppearWiz();
+        startAppearWiz();
     }
     else if (sel == "setup_keys")
     {

mythtv/programs/mythfrontend/mythfrontend.pro

@@ -24,7 +24,7 @@ HEADERS += playbackbox.h viewscheduled.h globalsettings.h audiogeneralsettings.h
 HEADERS += manualschedule.h programrecpriority.h channelrecpriority.h
 HEADERS += statusbox.h networkcontrol.h custompriority.h
 HEADERS += mediarenderer.h mythfexml.h playbackboxlistitem.h
-HEADERS += screenwizard.h exitprompt.h
+HEADERS += exitprompt.h
 HEADERS += action.h mythcontrols.h keybindings.h keygrabber.h
 HEADERS += progfind.h guidegrid.h customedit.h
 HEADERS += schedulecommon.h progdetails.h scheduleeditor.h
@@ -45,7 +45,7 @@ SOURCES += main.cpp playbackbox.cpp viewscheduled.cpp audiogeneralsettings.cpp
 SOURCES += globalsettings.cpp manualschedule.cpp programrecpriority.cpp
 SOURCES += channelrecpriority.cpp statusbox.cpp networkcontrol.cpp
 SOURCES += mediarenderer.cpp mythfexml.cpp playbackboxlistitem.cpp
-SOURCES += custompriority.cpp screenwizard.cpp exitprompt.cpp
+SOURCES += custompriority.cpp exitprompt.cpp
 SOURCES += action.cpp actionset.cpp  mythcontrols.cpp keybindings.cpp
 SOURCES += keygrabber.cpp progfind.cpp guidegrid.cpp
 SOURCES += customedit.cpp schedulecommon.cpp progdetails.cpp scheduleeditor.cpp