From 236db5ed87acf603898243734e2c5273c23568cb Mon Sep 17 00:00:00 2001
From: Johannes Schickel
Date: Sun, 1 Jul 2012 15:58:42 +0200
Subject: GUI: Automatically switch to list based save/load chooser when
 changing resolution below 640x400.

---
 gui/saveload-dialog.cpp | 41 ++++++++++++++++++++++++++++++++++++++++-
 gui/saveload-dialog.h   | 11 +++++++++++
 gui/saveload.cpp        |  2 --
 3 files changed, 51 insertions(+), 3 deletions(-)

diff --git a/gui/saveload-dialog.cpp b/gui/saveload-dialog.cpp
index 0a94fede51..3a778b2fa4 100644
--- a/gui/saveload-dialog.cpp
+++ b/gui/saveload-dialog.cpp
@@ -21,6 +21,7 @@
 
 #include "gui/saveload-dialog.h"
 #include "common/translation.h"
+#include "common/config-manager.h"
 
 #include "gui/message.h"
 #include "gui/gui-manager.h"
@@ -73,11 +74,17 @@ void SaveLoadChooserDialog::handleCommand(GUI::CommandSender *sender, uint32 cmd
 	switch (cmd) {
 	case kListSwitchCmd:
 		setResult(kSwitchToList);
+		// We save the requested dialog type here to avoid the setting to be
+		// overwritten when our reflowLayout logic selects a different dialog
+		// type.
+		ConfMan.set("gui_saveload_chooser", "list", Common::ConfigManager::kApplicationDomain);
 		close();
 		break;
 
 	case kGridSwitchCmd:
 		setResult(kSwitchToGrid);
+		// See above.
+		ConfMan.set("gui_saveload_chooser", "grid", Common::ConfigManager::kApplicationDomain);
 		close();
 		break;
 
@@ -101,13 +108,45 @@ void SaveLoadChooserDialog::addChooserButtons() {
 
 	_listButton = createSwitchButton("SaveLoadChooser.ListSwitch", "L", _("List view"), ThemeEngine::kImageList, kListSwitchCmd);
 	_gridButton = createSwitchButton("SaveLoadChooser.GridSwitch", "G", _("Grid view"), ThemeEngine::kImageGrid, kGridSwitchCmd);
-	if (!_metaInfoSupport || !_thumbnailSupport || _saveMode)
+	if (!_metaInfoSupport || !_thumbnailSupport || _saveMode || !(g_gui.getWidth() >= 640 && g_gui.getHeight() >= 400))
 		_gridButton->setEnabled(false);
 }
 
 void SaveLoadChooserDialog::reflowLayout() {
 	addChooserButtons();
 
+	const SaveLoadChooserType currentType = getType();
+	SaveLoadChooserType requestedType;
+
+	const Common::String &userConfig = ConfMan.get("gui_saveload_chooser", Common::ConfigManager::kApplicationDomain);
+	if (!_saveMode && g_gui.getWidth() >= 640 && g_gui.getHeight() >= 400
+	    && _metaEngine->hasFeature(MetaEngine::kSavesSupportMetaInfo)
+	    && _metaEngine->hasFeature(MetaEngine::kSavesSupportThumbnail)
+	    && userConfig.equalsIgnoreCase("grid")) {
+		// In case we are 640x400 or higher, this dialog is not in save mode,
+		// the user requested the grid dialog and the engines supports it we
+		// try to set it up.
+		requestedType = kSaveLoadDialogGrid;
+	} else {
+		// In all other cases we want to use the list dialog.
+		requestedType = kSaveLoadDialogList;
+	}
+
+	// Change the dialog type if there is any need for it.
+	if (requestedType != currentType) {
+		switch (requestedType) {
+		case kSaveLoadDialogGrid:
+			setResult(kSwitchToGrid);
+			break;
+
+		case kSaveLoadDialogList:
+			setResult(kSwitchToList);
+			break;
+		}
+
+		close();
+	}
+
 	Dialog::reflowLayout();
 }
 
diff --git a/gui/saveload-dialog.h b/gui/saveload-dialog.h
index 7921f5798a..75b1dc41e0 100644
--- a/gui/saveload-dialog.h
+++ b/gui/saveload-dialog.h
@@ -32,6 +32,11 @@ namespace GUI {
 #define kSwitchToList -2
 #define kSwitchToGrid -3
 
+enum SaveLoadChooserType {
+	kSaveLoadDialogList = 0,
+	kSaveLoadDialogGrid = 1
+};
+
 class SaveLoadChooserDialog : protected Dialog {
 public:
 	SaveLoadChooserDialog(const Common::String &dialogName, const bool saveMode);
@@ -43,6 +48,8 @@ public:
 
 	virtual void handleCommand(GUI::CommandSender *sender, uint32 cmd, uint32 data);
 
+	virtual SaveLoadChooserType getType() const = 0;
+
 	int run(const Common::String &target, const MetaEngine *metaEngine);
 	virtual const Common::String &getResultString() const = 0;
 
@@ -77,6 +84,8 @@ public:
 
 	virtual void reflowLayout();
 
+	virtual SaveLoadChooserType getType() const { return kSaveLoadDialogList; }
+
 	virtual void close();
 private:
 	virtual int runIntern();
@@ -109,6 +118,8 @@ public:
 
 	virtual void reflowLayout();
 
+	virtual SaveLoadChooserType getType() const { return kSaveLoadDialogGrid; }
+
 	virtual void close();
 protected:
 	virtual void handleCommand(GUI::CommandSender *sender, uint32 cmd, uint32 data);
diff --git a/gui/saveload.cpp b/gui/saveload.cpp
index 9cc8935f03..7f3dd6d5d8 100644
--- a/gui/saveload.cpp
+++ b/gui/saveload.cpp
@@ -93,11 +93,9 @@ int SaveLoadChooser::runModalWithPluginAndTarget(const EnginePlugin *plugin, con
 		if (ret == kSwitchToList) {
 			delete _impl;
 			_impl = new SaveLoadChooserSimple(_title, _buttonLabel, _saveMode);
-			ConfMan.set("gui_saveload_chooser", "list", Common::ConfigManager::kApplicationDomain);
 		} else if (ret == kSwitchToGrid) {
 			delete _impl;
 			_impl = new LoadChooserThumbnailed(_title);
-			ConfMan.set("gui_saveload_chooser", "grid", Common::ConfigManager::kApplicationDomain);
 		}
 	} while (ret < -1);
 
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