Welcome: Restore legibility

After the release of Qt Creator 13.0.0, a couple of bug reports and
comments regarding reduced legibility appeared.

They boil down to:

 1) Text appears blurry
 2) Text is too small
 3) Text contrast is too low

This change fixes the blurryness by setting less custom font weights for
non-HighDpi systems in StyleHelper::uiFont().

Bigger texts are used for the "Session" and "Recent Project" delegates.

The text contrast is being increased by making Token_Text_Accent darker
for light themes and brighter for dark themes.
Token_Background_Muted, which is used as background color is made a bit
brighter for light themes.

Fixes: QTCREATORBUG-30579
Fixes: QTCREATORBUG-30637
Fixes: QTCREATORBUG-30650
Change-Id: I8eeb9db6854a19b0de0bcee14b10e2ef66234e06
Reviewed-by: André Hartmann <aha_1980@gmx.de>
Reviewed-by: hjk <hjk@qt.io>

1 files changed, 7 insertions, 1 deletions

diff --git a/src/libs/utils/stylehelper.cpp b/src/libs/utils/stylehelper.cpp
index 69b5e39556..07f526a4af 100644
--- a/src/libs/utils/stylehelper.cpp
+++ b/src/libs/utils/stylehelper.cpp
@@ -1010,7 +1010,13 @@ QFont StyleHelper::uiFont(UiElement element)
     const qreal qrealPointSize = metrics.pixelSize * pixelsToPointSizeFactor;
     font.setPointSizeF(qrealPointSize);
 
-    font.setWeight(metrics.weight);
+    // Intermediate font weights can produce blurry rendering and are harder to read.
+    // For "non-retina" screens, apply the weight only for some fonts.
+    static const bool isHighDpi = qApp->devicePixelRatio() >= 2;
+    const bool setWeight = isHighDpi || element == UiElementCaptionStrong
+                           || element <= UiElementH4;
+    if (setWeight)
+        font.setWeight(metrics.weight);
 
     return font;
 }