added ui scaling

src/singletons/fontmanager.cpp

@@ -121,7 +121,7 @@ FontManager::FontData FontManager::createFontData(Type type, float scale)
 
         static std::unordered_map<Type, UiFontData> defaultSize{
             {Tiny, {8, "Monospace", false, QFont::Normal}},
-            {UiMedium, {int(12 * multiplier), DEFAULT_FONT_FAMILY, false, QFont::Normal}},
+            {UiMedium, {int(9 * multiplier), DEFAULT_FONT_FAMILY, false, QFont::Normal}},
             {UiTabs, {int(9 * multiplier), DEFAULT_FONT_FAMILY, false, QFont::Normal}},
         };
 

src/singletons/settingsmanager.hpp

@@ -44,6 +44,7 @@ public:
     IntSetting collpseMessagesMinLines = {"/appearance/messages/collapseMessagesMinLines", 0};
     BoolSetting alternateMessageBackground = {"/appearance/messages/alternateMessageBackground",
                                               false};
+    IntSetting uiScale = {"/appearance/uiScale", 0};
     BoolSetting windowTopMost = {"/appearance/windowAlwaysOnTop", false};
     BoolSetting showTabCloseButton = {"/appearance/showTabCloseButton", true};
     BoolSetting hidePreferencesButton = {"/appearance/hidePreferencesButton", false};

src/singletons/windowmanager.cpp

@@ -7,6 +7,7 @@
 #include "singletons/pathmanager.hpp"
 #include "singletons/thememanager.hpp"
 #include "util/assertinguithread.hpp"
+#include "util/clamp.hpp"
 #include "widgets/accountswitchpopupwidget.hpp"
 #include "widgets/settingsdialog.hpp"
 
@@ -410,5 +411,53 @@ void WindowManager::incGeneration()
     this->generation++;
 }
 
+int WindowManager::clampUiScale(int scale)
+{
+    return util::clamp(scale, uiScaleMin, uiScaleMax);
+}
+
+float WindowManager::getUiScaleValue()
+{
+    return getUiScaleValue(getApp()->settings->uiScale.getValue());
+}
+
+float WindowManager::getUiScaleValue(int scale)
+{
+    switch (clampUiScale(scale)) {
+        case -5:
+            return 0.5f;
+        case -4:
+            return 0.6f;
+        case -3:
+            return 0.7f;
+        case -2:
+            return 0.8f;
+        case -1:
+            return 0.9f;
+        case 0:
+            return 1;
+        case 1:
+            return 1.2f;
+        case 2:
+            return 1.4f;
+        case 3:
+            return 1.6f;
+        case 4:
+            return 1.6f;
+        case 5:
+            return 2;
+        case 6:
+            return 2.33f;
+        case 7:
+            return 2.66f;
+        case 8:
+            return 3;
+        case 9:
+            return 3.5f;
+        case 10:
+            return 4;
+    }
+}
+
 }  // namespace singletons
 }  // namespace chatterino

src/singletons/windowmanager.hpp

@@ -42,6 +42,12 @@ public:
     pajlada::Signals::NoArgSignal repaintGifs;
     pajlada::Signals::Signal<Channel *> layout;
 
+    static const int uiScaleMin = -5;
+    static const int uiScaleMax = 10;
+    static int clampUiScale(int scale);
+    static float getUiScaleValue();
+    static float getUiScaleValue(int scale);
+
 private:
     bool initialized = false;