{"id":4732,"date":"2017-10-09T14:06:26","date_gmt":"2017-10-09T06:06:26","guid":{"rendered":"http:\/\/blog.qdac.cc\/?p=4732"},"modified":"2017-10-11T17:12:51","modified_gmt":"2017-10-11T09:12:51","slug":"fmx%e5%a4%aa%e7%b3%8a%e5%bc%84%e4%ba%86%ef%bc%8c%e8%af%b7%e4%b8%8d%e8%a6%81%e4%bd%bf%e7%94%a8-fmx-platform-win-%e4%b8%ad-getdisplaymatrics-%e6%9d%a5%e8%8e%b7%e5%8f%96%e7%89%a9%e7%90%86%e4%bf%a1","status":"publish","type":"post","link":"https:\/\/blog.qdac.cc\/?p=4732","title":{"rendered":"[FMX]\u592a\u7cca\u5f04\u4e86\uff0c\u8bf7\u4e0d\u8981\u4f7f\u7528 FMX.Platform.Win \u4e2d GetDisplayMatrics \u6765\u83b7\u53d6\u7269\u7406\u4fe1\u606f"},"content":{"rendered":"<p>\u4e0a\u5b98\u65b9\u7684\u5b9e\u73b0\u6e90\u7801\uff1a<\/p>\n<pre class=\"lang:delphi decode:true \">function TPlatformWin.GetDisplayMetrics: TDeviceDisplayMetrics;\r\nvar\r\n  R: TRect;\r\nbegin\r\n  Winapi.Windows.GetWindowRect(GetDesktopWindow, R);\r\n  Result.PhysicalScreenSize := TSize.Create(R.Width, R.Height);\r\n  Result.RawScreenSize := Result.PhysicalScreenSize;\r\n  Result.LogicalScreenSize := Result.PhysicalScreenSize;\r\n  if Result.PhysicalScreenSize.cx &gt; 0 then\r\n    Result.AspectRatio := Result.PhysicalScreenSize.cy \/ Result.PhysicalScreenSize.cx\r\n  else\r\n    Result.AspectRatio := 1;\r\n  Result.PixelsPerInch := 96; \/\/ Windows Default\r\n  Result.ScreenScale := 1;\r\n  Result.FontScale := 1;\r\nend;<\/pre>\n<p>\u5bf9\u6bd4 Android \u7248\u672c\uff1a<\/p>\n<pre class=\"lang:delphi decode:true \">function TAndroidScreenServices.GetDisplayMetrics: TDeviceDisplayMetrics;\r\nvar\r\n  Metrics: JDisplayMetrics;\r\n  RawScreenSize: JPoint;\r\n  DensityDPI: Single;\r\nbegin\r\n  Metrics := TAndroidHelper.DisplayMetrics;\r\n  if Metrics &lt;&gt; nil then\r\n  begin\r\n    Result.PhysicalScreenSize := TSize.Create(Metrics.widthPixels, Metrics.heightPixels);\r\n    DensityDPI := Round((Metrics.xdpi + Metrics.ydpi) \/ 2);\r\n    if DensityDPI &lt;&gt; 0 then\r\n    begin\r\n      Result.LogicalScreenSize.cx := Trunc(Metrics.widthPixels \/ DensityDPI);\r\n      Result.LogicalScreenSize.cy := Trunc(Metrics.heightPixels \/ DensityDPI);\r\n    end\r\n    else\r\n      Result.LogicalScreenSize := Result.PhysicalScreenSize;\r\n    if Metrics.widthPixels &lt;&gt; 0 then\r\n      Result.AspectRatio := Metrics.heightPixels \/ Metrics.widthPixels\r\n    else\r\n      Result.AspectRatio := 1;\r\n    Result.PixelsPerInch := Round(DensityDPI);\r\n    Result.ScreenScale := Metrics.density;\r\n    Result.FontScale := Metrics.scaledDensity;\r\n  end\r\n  else\r\n    Result := TDeviceDisplayMetrics.Default;\r\n  RawScreenSize := MainActivity.getRawDisplaySize;\r\n  if RawScreenSize &lt;&gt; nil then\r\n    if (Result.PhysicalScreenSize.cx &gt; Result.PhysicalScreenSize.cy) and (RawScreenSize.x &gt; RawScreenSize.y) then\r\n      Result.RawScreenSize := TSize.Create(RawScreenSize.x, RawScreenSize.y)\r\n    else\r\n      Result.RawScreenSize := TSize.Create(RawScreenSize.y, RawScreenSize.x)\r\n  else\r\n    Result.RawScreenSize := Result.PhysicalScreenSize;\r\nend;<\/pre>\n<p>\u518d\u5bf9\u6bd4 iOS \u7684\uff1a<\/p>\n<pre class=\"lang:delphi decode:true \">function TCocoaTouchScreenServices.GetDisplayMetrics: TDeviceDisplayMetrics;\r\nconst\r\n  IOSBasePPI = 163;\r\nvar\r\n  ScreenSize: TPointF;\r\n  ScreenScale: Single;\r\nbegin\r\n  ScreenSize := GetScreenSize;\r\n  ScreenScale := GetScreenScale;\r\n  Result.PhysicalScreenSize := TSize.Create(Round(ScreenSize.X * ScreenScale), Round(ScreenSize.Y * ScreenScale));\r\n  Result.RawScreenSize := Result.PhysicalScreenSize;\r\n  Result.LogicalScreenSize := TSize.Create(Round(ScreenSize.X), Round(ScreenSize.Y));\r\n  if Abs(ScreenSize.X) &gt; 0 then\r\n    Result.AspectRatio := ScreenSize.Y \/ ScreenSize.X\r\n  else\r\n    Result.AspectRatio := 1;\r\n  Result.PixelsPerInch := Round(IOSBasePPI * ScreenScale);\r\n  Result.ScreenScale := ScreenScale;\r\n  Result.FontScale := ScreenScale;\r\nend;<\/pre>\n<p>\u6362\u53e5\u8bdd\u8bf4\uff0cWindows \u7248\u7684\u7269\u7406\u5c4f\u5e55\u5c3a\u5bf8\u3001\u903b\u8f91\u5c4f\u5e55\u5c3a\u5bf8\u548c\u539f\u59cb\u5c4f\u5e55\u5c3a\u5bf8\u662f\u4e00\u4e2a\u4e1c\u897f\uff0c\u5e76\u4e0d\u4f1a\u53cd\u9988\u5b9e\u9645\u7684\u663e\u793a\u5668\u4fe1\u606f\u3002\u8981\u5728 Windows \u4e0b\u83b7\u53d6\u5c4f\u5e55\u7684\u7269\u7406\u5c3a\u5bf8\uff0c\u53ef\u4ee5\u8c03\u7528\u00a0GetDeviceCaps \u83b7\u53d6\uff0c\u7d22\u5f15\u4e3a\u00a0HORZSIZE \u548cVERTSIZE\uff0c\u5bf9\u5e94\u6c34\u5e73\u548c\u5782\u76f4\u957f\u5ea6\uff0c\u5355\u4f4d\u4e3a\u6beb\u7c73\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e0a\u5b98\u65b9\u7684\u5b9e\u73b0\u6e90\u7801\uff1a function T [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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