UI: Fix confirmation logic when changing drivers with a game loaded (#1428)

Addresses a minor issue with driver change confirmation logic and the
"Apply" button in the UI.

Previously, if the player changed the video, audio, or input driver with
a title loaded and clicked "No" at the confirmation dialog, the "Apply"
button would be disabled as if the player had changed the driver, when
they had not.

With this PR the "Apply" button state correctly reflects the driver
state and the result of the confirmation modal.

Co-authored-by: jcm <butt@butts.com>

desktop-ui/settings/drivers.cpp

@@ -11,8 +11,9 @@ auto DriverSettings::construct() -> void {
   videoDriverLabel.setText("Driver:");
   videoDriverAssign.setText("Apply").setEnabled(false).onActivate([&] {
     settings.video.driver = videoDriverList.selected().text();
-    videoDriverUpdate();
-    videoDriverAssign.setEnabled(false);
+    if (videoDriverUpdate()) {
+      videoDriverAssign.setEnabled(false);
+    }
   });
   videoMonitorLabel.setText("Fullscreen monitor:");
   videoMonitorList.onChange([&] {
@@ -48,8 +49,9 @@ auto DriverSettings::construct() -> void {
   audioDriverLabel.setText("Driver:");
   audioDriverAssign.setText("Apply").setEnabled(false).onActivate([&] {
     settings.audio.driver = audioDriverList.selected().text();
-    audioDriverUpdate();
-    audioDriverAssign.setEnabled(false);
+    if (audioDriverUpdate()) {
+      audioDriverAssign.setEnabled(false);
+    }
   });
   audioDeviceLabel.setText("Output device:");
   audioDeviceList.onChange([&] {
@@ -91,8 +93,9 @@ auto DriverSettings::construct() -> void {
   inputDriverLabel.setText("Driver:");
   inputDriverAssign.setText("Apply").setEnabled(false).onActivate([&] {
     settings.input.driver = inputDriverList.selected().text();
-    inputDriverUpdate();
-    inputDriverAssign.setEnabled(false);
+    if (inputDriverUpdate()) {
+      inputDriverAssign.setEnabled(false);
+    }
   });
   inputDefocusLabel.setText("When focus is lost:");
   inputDefocusPause.setText("Pause emulation").onActivate([&] {
@@ -148,13 +151,14 @@ auto DriverSettings::videoRefresh() -> void {
   VerticalLayout::resize();
 }
 
-auto DriverSettings::videoDriverUpdate() -> void {
+auto DriverSettings::videoDriverUpdate() -> bool {
   if(emulator && settings.video.driver != "None" && MessageDialog(
     "Warning: incompatible drivers may cause this software to crash.\n"
     "Are you sure you want to change this driver while a game is loaded?"
-  ).setAlignment(settingsWindow).question() != "Yes") return;
+  ).setAlignment(settingsWindow).question() != "Yes") return false;
   program.videoDriverUpdate();
   videoRefresh();
+  return true;
 }
 
 auto DriverSettings::audioRefresh() -> void {
@@ -189,13 +193,14 @@ auto DriverSettings::audioRefresh() -> void {
   VerticalLayout::resize();
 }
 
-auto DriverSettings::audioDriverUpdate() -> void {
+auto DriverSettings::audioDriverUpdate() -> bool {
   if(emulator && settings.audio.driver != "None" && MessageDialog(
     "Warning: incompatible drivers may cause this software to crash.\n"
     "Are you sure you want to change this driver while a game is loaded?"
-  ).setAlignment(settingsWindow).question() != "Yes") return;
+  ).setAlignment(settingsWindow).question() != "Yes") return false;
   program.audioDriverUpdate();
   audioRefresh();
+  return true;
 }
 
 auto DriverSettings::inputRefresh() -> void {
@@ -208,11 +213,12 @@ auto DriverSettings::inputRefresh() -> void {
   VerticalLayout::resize();
 }
 
-auto DriverSettings::inputDriverUpdate() -> void {
+auto DriverSettings::inputDriverUpdate() -> bool {
   if(emulator && settings.input.driver != "None" && MessageDialog(
     "Warning: incompatible drivers may cause this software to crash.\n"
     "Are you sure you want to change this driver while a game is loaded?"
-  ).setAlignment(settingsWindow).question() != "Yes") return;
+  ).setAlignment(settingsWindow).question() != "Yes") return false;
   program.inputDriverUpdate();
   inputRefresh();
+  return true;
 }

desktop-ui/settings/settings.hpp

@@ -313,11 +313,11 @@ struct PathSettings : VerticalLayout {
 struct DriverSettings : VerticalLayout {
   auto construct() -> void;
   auto videoRefresh() -> void;
-  auto videoDriverUpdate() -> void;
+  auto videoDriverUpdate() -> bool;
   auto audioRefresh() -> void;
-  auto audioDriverUpdate() -> void;
+  auto audioDriverUpdate() -> bool;
   auto inputRefresh() -> void;
-  auto inputDriverUpdate() -> void;
+  auto inputDriverUpdate() -> bool;
 
   Label videoLabel{this, Size{~0, 0}, 5};
   HorizontalLayout videoDriverLayout{this, Size{~0, 0}};
@@ -432,4 +432,4 @@ extern OptionSettings& optionSettings;
 extern FirmwareSettings& firmwareSettings;
 extern PathSettings& pathSettings;
 extern DriverSettings& driverSettings;
-extern DebugSettings& debugSettings;
+extern DebugSettings& debugSettings;