Implement clamping to min and max brightness

AdaptiveBrightness/main_window.cpp

@@ -291,23 +291,6 @@ void MainWindow::updateState()
         return true;
     };
 
-    const auto setAllMonitorsBrightness = [this](float& brightness) {
-        if(m_monitors.empty()) {
-            return false;
-        }
-
-        bool errorOccurred = false;
-        for(auto& monitor: m_monitors) {
-            if(!std::isnan(brightness) && !monitor.manualOverride) {
-                monitor.brightness = brightness;
-            }
-            if(!monitor.driver.setBrightness(monitor.brightness)) {
-                errorOccurred = true;
-            }
-        }
-        return !errorOccurred;
-    };
-
     auto brightness = NAN;
 
     if(!getAverageSensorValue(brightness)) {
@@ -318,7 +301,7 @@ void MainWindow::updateState()
 
     const auto iconBrightness = utils::map(brightness, 0.f, 1.f, size_t{0}, size_t{8});
 
-    if(!setAllMonitorsBrightness(brightness)) {
+    if(!setMonitorBrightness(brightness)) {
         enumMonitors();
         qInfo(ltr("At least one monitor became invalid, re-enumerating monitors found %1 valid monitor(s)").arg(m_monitors.size()));
         monitorError = true;
@@ -339,6 +322,34 @@ void MainWindow::updateState()
     }
 }
 
+bool MainWindow::setMonitorBrightness(float brightness)
+{
+    if(m_monitors.empty()) {
+        return false;
+    }
+
+    bool errorOccurred = false;
+
+    for(size_t i = 0; i < m_monitors.size(); ++i) {
+        if(!std::isnan(brightness) && !m_monitors[i].manualOverride) {
+            m_monitors[i].brightness = brightness;
+        }
+
+        m_monitors[i].brightness = std::clamp(m_monitors[i].brightness, m_monitors[i].minBrightness, m_monitors[i].maxBrightness);
+
+        if(!m_monitors[i].driver.setBrightness(m_monitors[i].brightness)) {
+            errorOccurred = true;
+        }
+        else {
+            if(m_ui.monitorDropdown->currentIndex() == i) {
+                updateCurrentMonitorGUI(i);
+            }
+        }
+    }
+
+    return !errorOccurred;
+}
+
 void MainWindow::trayIconClicked(QSystemTrayIcon::ActivationReason reason)
 {
     if(reason == QSystemTrayIcon::ActivationReason::Trigger) {

AdaptiveBrightness/main_window.hpp

@@ -46,6 +46,8 @@ class MainWindow : public QMainWindow {
 
     void updateState();
 
+    bool setMonitorBrightness(float brightness);
+
     void trayIconClicked(QSystemTrayIcon::ActivationReason reason);
 
     Ui::MainWindow m_ui;