Dialog boxes & Controls

Transparent dialogs

• Demonstration
• Functionality:
  • main window
    • file menu
      • New dialog (accelerator Ctrl+N) - open a new modeless dialog box
      • separator (has to be included in the menu)
      • menu items for dynamically created dialog boxes - selected item activates the corresponding dialog box
      • separator (has to be included in the menu)
      • Exit - close application
    • accelerators have to be visible in the menu items
    • many dialog boxes can be opened at the same time, the number of the dialogs is not known a priori
    • dynamically created menu item is checked when the corresponding dialog box is set as a top most one
  • modeless dialog box ('Tool Window' style has to be set)
    • new menu item is added to the file menu when a dialog box is created
      • by default, the new dialog box is opaque (transparency 0%) and non top most
      • the dialog box's text and menu item's text are the same, created with pattern 'Dialog X', where X is a number of successive opened dialog
    • check box 'Top-most' - disable/enable the top-most style for the dialog box
    • horizontal scroll bar - changes transparency level of the dialog box
      • transparency range - 0% - 50%
      • the current level has to be shown in a static control next to the scroll bar
      • SB_THUMBPOSITION and SB_THUMBTRACK messages have to be maintained as well
    • 'Close' button - destroys the dialog box, removes menu item (same as 'X' button)
• Hints:
  • SetActiveWindow(), SetWindowPos()
  • CreateDialog(), GetDlgItem(), SetDlgItemText(), IsDlgButtonChecked()
  • SetScrollRange(), SetScrollPos()
  • GetMenu(), GetSubMenu(), DeleteMenu(), InsertMenuItem(), MENUITEMINFO, CheckMenuItem()

• Approximate points:
  • creating a dialog (both with menu item and accelerator), appropriate styles for dialog box's window, destroying a dialog: 2.0
  • enable/disable top-most style for dialog: 1.0
  • transparency level altering: 3.5
  • dynamic menu items
    • add when dialog is created: 1.0
    • remove when dialog is destroyed: 0.5
    • dialog activate: 1.0
    • checked when top most: 1.0

• Links for uploading:
  • Solutions
  • Corrections