ncurses_test.go

// Licensed under the GPL-v3
// Copyright: Sebastian Tilders <info@informatikonline.net> (c) 2019

package ncurses

import ( 
	"fmt"
)

func Example_goTMDialog() {
  w,_ := ncurses.Initscr()
  
    // Ensure, that ncurses will be properly exited
  defer ncurses.Endwin()
  defer func() {
    if r := recover(); r != nil {
      ncurses.Endwin()
      fmt.Printf("panic:\n%s\n", r)
      os.Exit(-1)
    }
  }()

  // Enable color mode
  ncurses.StartColor()

  // Define color pairs
  ncurses.AddColorPair("bw", ncurses.ColorGreen,ncurses.ColorBlack)
  ncurses.AddColorPair("wb",ncurses.ColorWhite, ncurses.ColorBlue)

  // Set cursor visiblity to hidden
  ncurses.SetCursor(ncurses.CURSOR_HIDDEN)

  // Automatically refresh after each command
  w.AutoRefresh = true

  // Set color for stdscr-window to system defaults.
  w.Wbkgd("std")

  // Draw a border around main window (stdscr)
  w.Box()

  // Create a new window for greeting-text at cell (x=20,y=5) with a size of 25 x 5 cells.
  w2,err := ncurses.NewWindow("dialog",ncurses.Position{20,5},ncurses.Size{25,5})

  // This can fail if the terminal is too small.
  if err != nil {
    panic(err)
  }
  w2.AutoRefresh = true

  // Use color pair wb (2)
  w2.Wbkgd("wb")

  // Draw a border around our "Greeting Window".
  w2.Box()

  // Move cursor relative to the window borders of w2
  w2.Move(2,3)

  // Output our greeting text
  fmt.Fprintf(w2, "Hello from Go\u2122-Lang!") 

  // Move cursor relative to the beginning of our main window
  w.Move(17,19)

  // Output exit instruction for the user
  fmt.Fprintf(w," => Press a key to exit <=")

  // Wait for user input (e.g. keypress)
  w.Getch()
}

func ExampleInitscr_doThis() {
    fmt.Println("Before: This is okay!");
    w,_ := Initscr();

    // Normally, you could use defer Endwin()
    fmt.Fprintf(w, "While: This is also okay!")
    
    Endwin()
    fmt.Printf("After: This is also okay!")
    // do some things
}

func ExampleInitscr_dontDoThis() {
	    w,_ := Initscr();
	    // Make sure, to call Endwin() before exiting
    	defer Endwin()
		fmt.Println("Don't do this after you've called ncurses.InitScr()")
		// do some things
}

func ExampleAddColorPair() {
	w,_ := Initscr()
	defer Endwin()
	AddColorPair("mypair",ColorWhite,ColorBlue)
	SetColor("mypair")
	fmt.Fprintf(w, "Hello in White and Blue")
	// Output: Hello in White and Blue
}

func ExampleNewWindow() {
	w,_ := Initscr()
	defer Endwin()
	w2,err := NewWindow("MyWindow",Position{4,4},Size{20,4})
	if err != nil {
		panic(err)
	}
	fmt.Fprintf(w2,"Hello from MyWindow")
}