SCUMM: Add a difficulty selection dialog for Loom FM-Towns.

It is in spirit of the DOS version's selection dialog, but it has the
description above the buttons instead of below it.

3 files changed, 65 insertions, 0 deletions

diff --git a/engines/scumm/dialogs.cpp b/engines/scumm/dialogs.cpp
index 20aedae089..0e531daf73 100644
--- a/engines/scumm/dialogs.cpp
+++ b/engines/scumm/dialogs.cpp
@@ -648,4 +648,38 @@ void DebugInputDialog::handleKeyDown(Common::KeyState state) {
 	}
 }
 
+LoomTownsDifficultyDialog::LoomTownsDifficultyDialog()
+    : Dialog("LoomTownsDifficultyDialog"), _difficulty(-1) {
+	GUI::StaticTextWidget *text1 = new GUI::StaticTextWidget(this, "LoomTownsDifficultyDialog.Description1", _("Select a Proficiency Level."));
+	text1->setAlign(Graphics::kTextAlignCenter);
+	GUI::StaticTextWidget *text2 = new GUI::StaticTextWidget(this, "LoomTownsDifficultyDialog.Description2", _("Refer to your Loom(TM) manual for help."));
+	text2->setAlign(Graphics::kTextAlignCenter);
+
+	new GUI::ButtonWidget(this, "LoomTownsDifficultyDialog.Standard", _("Standard"), 0, kStandardCmd);
+	new GUI::ButtonWidget(this, "LoomTownsDifficultyDialog.Practice", _("Practice"), 0, kPracticeCmd);
+	new GUI::ButtonWidget(this, "LoomTownsDifficultyDialog.Expert", _("Expert"), 0, kExpertCmd);
+}
+
+void LoomTownsDifficultyDialog::handleCommand(GUI::CommandSender *sender, uint32 cmd, uint32 data) {
+	switch (cmd) {
+	case kStandardCmd:
+		_difficulty = 1;
+		close();
+		break;
+
+	case kPracticeCmd:
+		_difficulty = 0;
+		close();
+		break;
+
+	case kExpertCmd:
+		_difficulty = 2;
+		close();
+		break;
+
+	default:
+		GUI::Dialog::handleCommand(sender, cmd, data);
+	}
+}
+
 } // End of namespace Scumm
diff --git a/engines/scumm/dialogs.h b/engines/scumm/dialogs.h
index c26aa9f414..7977f123ed 100644
--- a/engines/scumm/dialogs.h
+++ b/engines/scumm/dialogs.h
@@ -187,6 +187,27 @@ public:
 	Common::String mainText;
 };
 
+/**
+ * Difficulty selection dialog for Loom FM-Towns.
+ */
+class LoomTownsDifficultyDialog : public GUI::Dialog {
+public:
+	LoomTownsDifficultyDialog();
+
+	int getSelectedDifficulty() const { return _difficulty; }
+protected:
+	virtual void handleCommand(GUI::CommandSender *sender, uint32 cmd, uint32 data);
+
+private:
+	enum {
+		kStandardCmd = 'STDD',
+		kPracticeCmd = 'PRAD',
+		kExpertCmd = 'EXPD'
+	};
+
+	int _difficulty;
+};
+
 } // End of namespace Scumm
 
 #endif
diff --git a/engines/scumm/scumm.cpp b/engines/scumm/scumm.cpp
index 9a093891d2..d3cc218cd3 100644
--- a/engines/scumm/scumm.cpp
+++ b/engines/scumm/scumm.cpp
@@ -1256,6 +1256,16 @@ void ScummEngine::setupScumm() {
 	// Load game from specified slot, if any
 	if (ConfMan.hasKey("save_slot")) {
 		requestLoad(ConfMan.getInt("save_slot"));
+	} else if (!ConfMan.hasKey("boot_param") && _game.id == GID_LOOM && _game.platform == Common::kPlatformFMTowns) {
+		// In case we run the Loom FM-Towns version and have no boot parameter
+		// nor start save game supplied we will show our own custom difficulty
+		// selection dialog, since the original does not have any.
+		LoomTownsDifficultyDialog difficultyDialog;
+		runDialog(difficultyDialog);
+
+		int difficulty = difficultyDialog.getSelectedDifficulty();
+		if (difficulty != -1)
+			_bootParam = difficulty;
 	}
 
 	_res->allocResTypeData(rtBuffer, 0, 10, kDynamicResTypeMode);