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# NiGui - extended message box
# This module provides an extended message box.
# The message box is shown as modal window.
# The message box can have up to 3 buttons with customizable titles.
# button1 will be focused.
# Call the proc msgBox() to open the message box.
# It will wait until the message box is closed.
# Meaning of the result value:
# 0 - message box was closed over the window close button or escape key
# 1..3 - button 1..3 clicked
# For an example see "example_04_msgboxes.nim".
import nigui
type MessageBoxWindow = ref object of WindowImpl
clickedButton: Button
proc buttonClick(event: ClickEvent) =
cast[MessageBoxWindow](event.control.parentWindow).clickedButton = cast[Button](event.control)
event.control.parentWindow.dispose()
proc msgBox*(parent: Window, message: string, title = "Message", button1 = "OK", button2, button3: string = ""): int {.discardable.} =
let buttonMinWidth = 100.scaleToDpi
var window = new MessageBoxWindow
window.init()
window.title = title
window.onKeyDown = proc(event: KeyboardEvent) =
if event.key == Key_Escape:
window.dispose()
var container = newLayoutContainer(Layout_Vertical)
container.padding = 10.scaleToDpi
window.control = container
var labelContainer = newLayoutContainer(Layout_Horizontal)
container.add(labelContainer)
labelContainer.widthMode = WidthMode_Expand
labelContainer.heightMode = HeightMode_Expand
var label = newLabel(message)
labelContainer.add(label)
var buttonContainer = newLayoutContainer(Layout_Horizontal)
buttonContainer.widthMode = WidthMode_Expand
buttonContainer.xAlign = XAlign_Center
buttonContainer.spacing = 12.scaleToDpi
container.add(buttonContainer)
var b1, b2, b3: Button
b1 = newButton(button1)
b1.minWidth = buttonMinWidth
b1.onClick = buttonClick
buttonContainer.add(b1)
b1.focus()
if button2 != "":
b2 = newButton(button2)
b2.minWidth = buttonMinWidth
b2.onClick = buttonClick
buttonContainer.add(b2)
if button3 != "":
b3 = newButton(button3)
b3.minWidth = buttonMinWidth
b3.onClick = buttonClick
buttonContainer.add(b3)
window.width = min(max(label.width + 40.scaleToDpi, buttonMinWidth * 3 + 65.scaleToDpi), 600.scaleToDpi)
window.height = min(label.height, 300.scaleToDpi) + buttonContainer.height + 70.scaleToDpi
# Center message box on window:
window.x = parent.x + ((parent.width - window.width) div 2)
window.y = parent.y + ((parent.height - window.height) div 2)
window.showModal(parent)
while not window.disposed:
app.sleep(100)
if window.clickedButton == b1:
result = 1
elif window.clickedButton == b2 and b2 != nil:
result = 2
elif window.clickedButton == b3 and b3 != nil:
result = 3
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