在图形安装程序和 NSIS 中，标签的文本在我动态更改时重叠

Question

我创建了一个自定义页面，其中包含一个标签和两个用于控制标签内容的按钮。我想在按钮的回调中设置标签的文本，如下代码：

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

但是结果显示有问题，“新”文本重叠在旧文本上，就像标签在重绘之前没有refreshed/cleared。

我在我的过程中是否错过了任何必要的调用？

Answer 1

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] 是的一部分 ${GraphicalInstallerRedraw[CONTROL]} 宏。

这适用于类型为 RadioButton 或 CheckBox 的 [CONTROL]，但它在 Label 中缺失。

我们将在下一个版本中修复此问题，对于此不一致之处，我们深表歉意。

Answer 2

一个简单的解决方法是在更新文本时隐藏标签：

!include nsDialogs.nsh
Page Custom gfxpage

Function onClick
Pop [=10=]
System::Call 'kernel32::GetTickCount()i.r0' ; "Arbitrary" number
ShowWindow  0
${NSD_SetText}  "[=10=][=10=][=10=]"
ShowWindow  1
FunctionEnd

Function .onInit
InitPluginsDir
File /oname=$PLUGINSDIR\image.bmp "${NSISDIR}\Contrib\Graphics\Header\nsis-r.bmp"
FunctionEnd

Function gfxpage
nsDialogs::Create 1018
Pop [=10=]

${NSD_CreateButton} 0 -13u 100% 12u "Click me"
Pop 
${NSD_OnClick}  onClick

${NSD_CreateLabel} 0 0 100% 12u "Hello, welcome to nsDialogs!"
Pop 
SetCtlColors  000000 transparent

${NSD_CreateBitmap} 0 0 100% 12u ""
Pop 
${NSD_SetBitmap}  $PLUGINSDIR\image.bmp 

nsDialogs::Show
${NSD_FreeBitmap} 
FunctionEnd

在图形安装程序和 NSIS 中，标签的文本在我动态更改时重叠

With in Graphical Installer & NSIS, the text of Label overlapped when I changed it dynamically

label

nsis

refresh