使用图形安装程序&amp；NSIS，当我动态更改标签时，标签的文本会重叠 [英] With in Graphical Installer & NSIS, the text of Label overlapped when I changed it dynamically

问题描述

我创建了一个定制页面，其中包含一个标签和两个按钮来控制标签的内容。 我想在按钮的回调中设置标签的文本，代码如下：

Function FuncShowNewFeature
  ; ...
  ; Add Controls
 
  ${NSD_CreateLabel} 0 13u 100% 12u "Show new features here"
  Pop $lblContents
  ${GraphicalInstallerRedrawLabel} $lblContents
  
  ${NSD_CreateButton} 0 -13u 40u 13u "Prev"
  Pop $btnPrev
  ${NSD_OnClick} $btnPrev PrevFeature ; callback
  
  ${NSD_CreateButton} -40u -13u 40u 13u "Next"
  Pop $btnNext
  ${NSD_OnClick} $btnNext NextFeature ; callback
  
  # Put this macro before EACH calling nsDialogs::Show to draw background properly
  ${GraphicalInstallerRedrawnsDialogsPage}
  nsDialogs::Show
FunctionEnd

Function NextFeature
  ${NSD_SetText} $lblContents "To show the next tip of new-feature"
  ${GraphicalInstallerRedrawLabel} $lblContents ;I don't know whether this macro is necessary here
FunctionEnd

Function PrevFeature
  ${NSD_SetText} $lblContents "To show the previous tip of new-feature"
  ${GraphicalInstallerRedrawLabel} $lblContents ;I don't know whether this macro is necessary here
FunctionEnd

但结果显示有错误，新的"；文本与旧的文本重叠，就像标签在重新绘制之前没有被刷新/清除一样。

在我的过程中是否错过了任何必要的调用？

推荐答案

您缺少GraphicalInstaller：：SubclassLabel/NOUNLOAD$Variable_NAME

正确代码：

Function FuncShowNewFeature
  ; ...
  ; Add Controls
 
  ${NSD_CreateLabel} 0 13u 100% 12u "Show new features here"
  Pop $lblContents
  ${GraphicalInstallerRedrawLabel} $lblContents
  GraphicalInstaller::SubclassLabel /NOUNLOAD $lblContents # <<< ADDED HERE
  
  ${NSD_CreateButton} 0 -13u 40u 13u "Prev"
  Pop $btnPrev
  ${NSD_OnClick} $btnPrev PrevFeature ; callback
  
  ${NSD_CreateButton} -40u -13u 40u 13u "Next"
  Pop $btnNext
  ${NSD_OnClick} $btnNext NextFeature ; callback
  
  # Put this macro before EACH calling nsDialogs::Show to draw background properly
  ${GraphicalInstallerRedrawnsDialogsPage}
  nsDialogs::Show
FunctionEnd

Function NextFeature
  ${NSD_SetText} $lblContents "To show the next tip of new-feature"
FunctionEnd

Function PrevFeature
  ${NSD_SetText} $lblContents "To show the previous tip of new-feature"
FunctionEnd

GraphicalInstaller：：Subclass[CONTROL]是以下项目的一部分 ${GraphicalInsteller Redraw[CONTROL]}宏。

这适用于类型为RadioButton或CheckBox的[控件]，但标签中缺少它。

我们将在下一个版本中修复此问题，对此不一致深表歉意。

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