From b57d69ef3bc75f48dca75af032e3af39558704ef Mon Sep 17 00:00:00 2001
From: wjyrich <wujiangyu@uniontech.com>
Date: Thu, 13 Nov 2025 14:41:36 +0800
Subject: [PATCH] fix: scale task manager preview icons for high DPI displays
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1. Added device pixel ratio scaling to icon size calculation
2. This ensures icons appear sharp and properly sized on high DPI
screens
3. Previously used fixed PREVIEW_TITLE_HEIGHT resulted in blurry icons
on high DPI displays
4. Now scales the icon pixmap according to the device's pixel ratio

fix: 为高DPI显示器缩放任务管理器预览图标

1. 在图标尺寸计算中添加设备像素比缩放
2. 确保在高DPI屏幕上图标显示清晰且尺寸正确
3. 之前使用的固定PREVIEW_TITLE_HEIGHT在高DPI显示器上会导致图标模糊
4. 现在根据设备的像素比缩放图标像素图

PMS: BUG-336089
---
 panels/dock/taskmanager/x11preview.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/panels/dock/taskmanager/x11preview.cpp b/panels/dock/taskmanager/x11preview.cpp
index c7aa9da3b..31ac8d495 100644
--- a/panels/dock/taskmanager/x11preview.cpp
+++ b/panels/dock/taskmanager/x11preview.cpp
@@ -770,7 +770,8 @@ void X11WindowPreviewContainer::updatePreviewIconFromString(const QString &strin
         pix.loadFromData(QByteArray::fromBase64(strs.at(1).toLatin1()));
     } else {
         // is (likely) icon name from theme
-        pix = QIcon::fromTheme(stringData).pixmap(PREVIEW_TITLE_HEIGHT, PREVIEW_TITLE_HEIGHT);
+        const int scaledSize = PREVIEW_TITLE_HEIGHT * qApp->devicePixelRatio();
+        pix = QIcon::fromTheme(stringData).pixmap(scaledSize, scaledSize);
     }
 
     if (pix.isNull()) {