实现预览图片切换功能

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小牛编辑

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2023-12-01

效果如图：

引用flighty.nsi的内容：

Name                "www.flighty.cn"
OutFile              "flighty.exe"

!include            MUI.nsh

!ifndef LR_LOADTRANSPARENT
  !define LR_LOADTRANSPARENT  0x0020
!endif

!ifndef LR_LOADFROMFILE
  !define LR_LOADFROMFILE     0x0010
!endif

!ifndef LR_CreateDIBSECTION
  !define LR_CreateDIBSECTION 0x2000
!endif

!ifndef STM_SETIMAGE
  !define STM_SETIMAGE        370
!endif

!ifndef IMAGE_BITMAP
  !define IMAGE_BITMAP        0
!endif

!ifndef sysLoadImage
  !define sysLoadImage        "user32::LoadImageA(i, t, i, i, i, i) i"
!endif

!ifndef sysDeleteObject
  !define sysDeleteObject     "gdi32::DeleteObject(i) i"
!endif

Var hwnd
Var ImageHandle

!macro DisplayImage PARENTWIN IMGHANDLE IMG_NAME
  StrCmp $ImageHandle '' +4
    StrCpy $6 $ImageHandle
    System::Call "${sysDeleteObject} (r6)"
    StrCpy $6 ''
  GetDlgItem $0 ${PARENTWIN} ${IMGHANDLE}
  System::Call '${sysLoadImage} (0, s, ${IMAGE_BITMAP}, 0, 0, ${LR_CreateDIBSECTION}|${LR_LOADFROMFILE}) .r6' "${IMG_NAME}"
  SendMessage $0 ${STM_SETIMAGE} ${IMAGE_BITMAP} $6
  StrCpy $ImageHandle $6
!macroend

ReserveFile "${NSISDIR}\Plugins\InstallOptions.dll"
ReserveFile io.ini
ReserveFile img1.bmp
ReserveFile img2.bmp

Page custom SetCustom LeaveCustom
!insertmacro MUI_PAGE_INSTFILES

!insertmacro MUI_LANGUAGE SimpChinese

Section -nothing
SectionEnd

Function .onInit
  InitPluginsDir
  File /oname=$PLUGINSDIR\io.ini io.ini
  File /oname=$PLUGINSDIR\img1.bmp img1.bmp
  File /oname=$PLUGINSDIR\img2.bmp img2.bmp
  WriteINIStr "$PLUGINSDIR\io.ini" "Field 1" "Text" "$PLUGINSDIR\img1.bmp"
FunctionEnd

Function SetCustom
  InstallOptions::initDialog /NOUNLOAD "$PLUGINSDIR\io.ini"
  Pop $hwnd
  !insertmacro DisplayImage $hwnd 1200 "$PLUGINSDIR\img1.bmp"
  InstallOptions::show
FunctionEnd

Function LeaveCustom
  ReadINIStr $0 "$PLUGINSDIR\io.ini" "Settings" "State"
  StrCmp $0 3 ImgBtn1
  StrCmp $0 4 ImgBtn2
  Goto InstallBtn
  ImgBtn1:
    !insertmacro DisplayImage $hwnd 1200 "$PLUGINSDIR\img1.bmp"
    Abort
  ImgBtn2:
    !insertmacro DisplayImage $hwnd 1200 "$PLUGINSDIR\img2.bmp"
    Abort
  InstallBtn:
FunctionEnd

引用io.ini的内容：

; Ini file generated by the HM NIS Edit IO designer.
[Settings]
NumFields=4

[Field 1]
Type=Bitmap
Left=6
Right=201
Top=3
Bottom=134

[Field 2]
Type=Groupbox
Text=select
Left=212
Right=271
Top=6
Bottom=60

[Field 3]
Type=RadioButton
Text=img 1
Flags=GROUP|NOTIFY
State=1
Left=222
Right=260
Top=22
Bottom=32

[Field 4]
Type=RadioButton
Text=img 2
Flags=NOTIFY
Left=222
Right=260
Top=40
Bottom=51

资源文件点击另存。