{"id":4018,"date":"2016-07-20T09:47:16","date_gmt":"2016-07-20T01:47:16","guid":{"rendered":"http:\/\/blog.qdac.cc\/?p=4018"},"modified":"2016-07-20T09:49:46","modified_gmt":"2016-07-20T01:49:46","slug":"fmx-%e8%ae%a1%e7%ae%97%e6%96%87%e6%9c%ac%e6%89%80%e5%8d%a0%e7%94%a8%e7%9a%84%e6%98%be%e7%a4%ba%e5%8c%ba%e5%9f%9f%e5%a4%a7%e5%b0%8f","status":"publish","type":"post","link":"https:\/\/blog.qdac.cc\/?p=4018","title":{"rendered":"[FMX] \u8ba1\u7b97\u6587\u672c\u6240\u5360\u7528\u7684\u663e\u793a\u533a\u57df\u5927\u5c0f"},"content":{"rendered":"<p>\u6211\u4eec\u6709\u65f6\u9700\u8981\u624b\u52a8\u8ba1\u7b97\u6587\u672c\u5185\u5bb9\u663e\u793a\u6240\u9700\u8981\u5360\u7528\u7684\u533a\u57df\u5927\u5c0f\uff0c\u5728 VCL \u4e2d\u76f8\u4fe1\u5927\u5bb6\u90fd\u5f88\u719f\u6089\u600e\u4e48\u505a\u4e86\u3002\u4f46\u5728 FMX \u4e2d\u5982\u4f55\u53bb\u8de8\u5e73\u53f0\u7684\u5b9e\u73b0\u5b83\uff0c\u8fd9\u5c31\u9700\u8981\u7814\u7a76\u7814\u7a76\u4e86\uff0c\u6bd5\u7adf\u8fde FMX \u81ea\u5e26\u7684 TLabel \u7684 AutoSize \u8bbe\u7f6e\u4e3a true \u90fd\u6ca1\u4ea7\u751f\u4efb\u4f55\u6548\u679c\u3002<\/p>\n<p>\u597d\u5427\uff0c\u9996\u5148\u770b\u770b\u6211\u4eec\u8981\u5305\u542b\u7684\u5355\u5143\uff1a<\/p>\n<ul>\n<li><strong>FMX.TextLayout \uff1a\u6211\u4eec\u9700\u8981 TTextLayout \u5b9e\u4f8b\u6765\u8ba1\u7b97\u6587\u672c\u5185\u5bb9\u7684\u663e\u793a\u533a\u57df<\/strong><\/li>\n<li><strong>FMX.Graphics \uff1a\u6211\u4eec\u9700\u8981\u5b83\u63d0\u4f9b TCanvasManager.MeasureCanvas \u7528\u4e8e\u8ba1\u7b97\u6587\u672c\u5185\u5bb9\u663e\u793a\u533a\u57df\u5927\u5c0f\u7684\u753b\u5e03<\/strong><\/li>\n<li><strong>FMX.Objects \uff1a\u6211\u4eec\u9700\u8981 TText \u6765\u53d6\u5f97\u6837\u5f0f\u4e2d\u7684\u5b57\u4f53\u8bbe\u7f6e\uff08\u5f53\u7136\uff0c\u5982\u679c\u4f60\u4e0d\u4f7f\u7528\u6837\u5f0f\u6765\u63a7\u5236\u63a7\u4ef6\u7684\u5b57\u4f53\u5927\u5c0f\uff0c\u5219\u8bf7\u5ffd\u7565\u5b83\uff09<\/strong><\/li>\n<\/ul>\n<p>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u6765\u770b\u770b\u5982\u4f55\u5b9e\u73b0\u8fd9\u4e2a\u8ba1\u7b97\u7684\u8fc7\u7a0b\uff1a<\/p>\n<ul>\n<li>\u9996\u5148\uff0c\u6211\u4eec\u8981\u786e\u4fdd\u6211\u4eec\u4f7f\u7528\u7684\u662f\u6b63\u786e\u7684\u5b57\u4f53\u3002\u5982\u679c\u4e00\u4e2a\u63a7\u4ef6\uff0c\u5982 TLabel \u4f7f\u7528\u4e86\u6837\u5f0f\u7684\u5b57\u4f53\uff0c\u6211\u4eec\u8ba1\u7b97\u65f6\u5c31\u5fc5\u9700\u4f7f\u7528\u6837\u5f0f\u7684\u5b57\u4f53\uff0c\u5426\u5219\u5e94\u8be5\u4f7f\u7528\u63a7\u4ef6\u672c\u8eab\u7684\u5b57\u4f53\u8bbe\u7f6e\u3002<\/li>\n<li>\u5176\u6b21\uff0c\u6211\u4eec\u8ba1\u7b97\u65f6\u8981\u8bbe\u7f6e\u4e00\u5806\u5c5e\u6027\uff0c\u6700\u540e\u76f4\u63a5\u53d6 TTextLayout \u5b9e\u4f8b\u7684 TextRect \u5c31\u662f\u5185\u5bb9\u5360\u636e\u7684\u533a\u57df\u3002\u7531\u4e8e\u9762\u8981\u66f4\u6539 TTextLayout \u5b9e\u4f8b\u7684\u591a\u4e2a\u5c5e\u6027\uff0c\u6211\u4eec\u6700\u597d\u8c03\u7528 BeginUpdate\/EndUpdate \u6765\u63d0\u9ad8\u6548\u7387\u3002<\/li>\n<\/ul>\n<p>\u597d\u4e86\uff0c\u6211\u4eec\u6765\u770b\u5b9e\u73b0\uff1a<\/p>\n<pre class=\"lang:delphi decode:true \">function CalcTextRect(S: String; ASettings: TTextSettings;\r\n  const AMaxWidth: Single): TRectF;\r\nvar\r\n  ATextLayout: TTextLayout;\r\nbegin\r\n  Result := TRectF.Create(0, 0, AMaxWidth, MaxInt);\r\n  ATextLayout := TTextLayoutManager.TextLayoutByCanvas\r\n    (TCanvasManager.MeasureCanvas.ClassType)\r\n    .Create(TCanvasManager.MeasureCanvas);\r\n  try\r\n    ATextLayout.BeginUpdate;\r\n    ATextLayout.Font.Assign(ASettings.Font);\r\n    ATextLayout.HorizontalAlign := ASettings.HorzAlign;\r\n    ATextLayout.WordWrap:=ASettings.WordWrap;\r\n    ATextLayout.Text := S;\r\n    ATextLayout.EndUpdate;\r\n    Result:=ATextLayout.TextRect;\r\n  finally\r\n    ATextLayout.DisposeOf;\r\n  end;\r\nend;<\/pre>\n<p>\u6211\u4eec\u6d4b\u8bd5\u4e00\u4e0b\u6548\u679c\uff1a<\/p>\n<pre class=\"lang:delphi decode:true \">procedure TForm2.Button1Click(Sender: TObject);\r\nvar\r\n  ARect: TRectF;\r\nbegin\r\n  ARect:=CalcTextRect(Memo1.Text,Label1.ResultingTextSettings,ClientWidth);\r\n  Label1.Height := ARect.Height;\r\n  Label1.Width := ARect.Width;\r\n  Label1.Text := Memo1.Text;\r\nend;<\/pre>\n<p>\u5176\u4e2d\uff0c\u6211\u4eec\u5728 Label1 \u4e2d\u8bbe\u7f6e\u4e86\u4e00\u4e2a TRectangle\uff0c\u5bf9\u9f50\u65b9\u5f0f\u4e3a Content\uff0c\u586b\u5145\u6837\u5f0f\u8bbe\u7f6e\u4e3a None\uff0c\u5b9e\u9645\u8fd0\u884c\u6548\u679c\u5982\u4e0b\u56fe\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-4019\" src=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2016\/07\/TextLayout.jpg\" alt=\"TextLayout\" width=\"322\" height=\"590\" srcset=\"https:\/\/blog.qdac.cc\/wp-content\/uploads\/2016\/07\/TextLayout.jpg 322w, https:\/\/blog.qdac.cc\/wp-content\/uploads\/2016\/07\/TextLayout-164x300.jpg 164w\" sizes=\"auto, (max-width: 322px) 100vw, 322px\" \/><\/p>\n<p>\u7b49\u7b49\uff0c\u4f60\u8bf4\u4f60\u524d\u9762\u8981\u5f15\u7528 TText \u5bf9\u8c61\uff0c\u8fd9\u91cc\u4e5f\u6ca1\u89c1\u5230\u5440\uff01\u752d\u7740\u6025\uff0c\u4e0a\u9762\u7684\u4ee3\u7801\u6839\u672c\u6ca1\u8003\u8651\u5343\u53d8\u4e07\u5316\u7684\u53d8\u6001\u6837\u5f0f\u3002\u5982\u679c\u6211\u4eec\u8981\u8003\u8651\u6837\u5f0f\uff0c\u5219\u9700\u8981\u67e5\u627e Label1 \u6240\u6709\u7684\u5b50\u63a7\u4ef6\u4e2d\uff0c\u7c7b\u578b\u4e3a TText\uff0cStyleName \u4e3a text \u7684\u5bf9\u8c61\uff0c\u7136\u540e\u8ba1\u7b97\u5b83\u76f8\u5bf9\u4e8e Label1 \u8fb9\u7f18\u7684\u4f4d\u7f6e\uff0c\u7136\u540e\u518d\u8ba1\u7b97\u989d\u5916\u8981\u6dfb\u52a0\u7684\u4e0a\u3001\u4e0b\u3001\u5de6\u3001\u53f3\u7a7a\u95f4\uff0c\u624d\u80fd\u771f\u6b63\u5f97\u51fa\u6700\u7ec8\u9700\u8981\u7684\u77e9\u5f62\u533a\u57df\uff0c\u4e0d\u8fc7\u8fd9\u91cc\u5c31\u4e0d\u5570\u55e6\u4e86\uff0c\u81ea\u5df1\u53bb\u73a9\u5427\u3002<\/p>\n<p>\u5982\u679c\u8003\u8651\u5230\u591a\u6b21\u91cd\u590d\u6267\u884c\u6d4b\u8bd5\uff0c\u6700\u597d\u5355\u72ec\u5b9a\u4e49\u4e00\u4e2a\u7c7b\uff0c\u5c06 TTextLayout \u5b9e\u4f8b\u7f13\u5b58\u6765\u4e0b\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u91cd\u590d\u521b\u5efa\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6211\u4eec\u6709\u65f6\u9700\u8981\u624b\u52a8\u8ba1\u7b97\u6587\u672c\u5185\u5bb9\u663e\u793a\u6240\u9700\u8981\u5360 [&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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