Color Indicator for nsDialogs

Author: Jan (talk, contrib)

Description

An example for color indication in nsDialogs controls. Depending on the input in the text control, the background color will change to yellow (no input) or red (wrong input).

Function

OutFile ColorfulErrors.exe
 
;includes 
 !include nsDialogs.nsh
 !include LogicLib.nsh
 
;variables 
 Var Dialog
 Var Directory
 Var ButtonClear
 Var ButtonReset
 
;definitions
 !define GREEN "0xfff799"
 !define BLACK "0xf69679"
 
;pages
 Page custom nsDialogsPage nsDialogsLeave
 Page InstFiles
 
;functions
 Function nsDialogsPage
	nsDialogs::Create /NOUNLOAD 1018
	Pop $Dialog
 
	${If} $Dialog == error
		Abort
	${EndIf}
 
	${NSD_CreateLabel} 0 0 100% 70% "This example uses colors to indicate a state of a text-control. To understand the behaviour, please try out the following:$\n$\n$\t1. add or delete characters from the path$\n$\t2. click the clear button$\n$\t3. click reset$\n$\nAs you can see, the background color of the control changes depending on the input. A wrong path will indicate red, a missing input will indicate yellow. Only the correct path of $$DESKTOP will show the default color."
 
 	${NSD_CreateText} 0 70% 75% 20 "$DESKTOP"
	Pop $Directory
	${NSD_OnChange} $Directory OnChange
 
	${NSD_CreateButton} 78% 70% 10% 20 "Clear"
	Pop $ButtonClear
	${NSD_OnClick} $ButtonClear OnClickClear
 
	${NSD_CreateButton} 90% 70% 10% 20 "Reset"
	Pop $ButtonReset
	${NSD_OnClick} $ButtonReset OnClickReset
 
	${NSD_CreateLabel} 0 85% 100% 10% "PS: Unfortunately you *might* have to leave a control to see the effect!"
 
	nsDialogs::Show
 FunctionEnd 
 
 Function nsDialogsLeave
	${NSD_GetText} $Directory $0
 
	${If} $0 == ""
		MessageBox MB_YESNO|MB_ICONEXCLAMATION "Enter the path to your Desktop. Ignore?" IDYES +2
		Abort
	${ElseIfNot} $0 == "$DESKTOP"
		MessageBox MB_YESNO|MB_ICONEXCLAMATION "Not the path to your Desktop. Ignore?" IDYES +2
		Abort
	${EndIf}
 FunctionEnd
 
 Function OnChange
	Pop $0 # HWND
	${NSD_GetText} $Directory $0
 
	${If} $0 == ""
		SetCtlColors $Directory "" ${YELLOW}
	${Else}		
		${If} ${FileExists} "$0\*.*"
			SetCtlColors $Directory "" "" ;reset colors
		${Else}
			SetCtlColors $Directory "" ${RED}
		${EndIf}
	${EndIf}	
 FunctionEnd
 
 Function OnClickClear
	Pop $0 # HWND
	${NSD_SetText} $Directory ""
 FunctionEnd
 
 Function OnClickReset
	Pop $0 # HWND
	${NSD_SetText} $Directory "$DESKTOP"
 FunctionEnd
 
;(dummy) section
 Section
	Quit
 SectionEnd