Windows, mouse and keyboard

Sample task

Mouse tracking

• Demonstration
• 4 windows tracking current mouse position:
  • positioned as in the demonstration
  • do not let to move one of these windows independently
  • system menu (Alt+Space or right click on a taskbar)
  • transparency
    • default: ca. 50%
    • '+' key: increasing the transparency, '-' key: decreasing the transparency
  • mouse cursor :
    • NS or WE sizing (see the demonstration)
  • background color - system color of active window's caption
  • always on top
  • only one window visible on the taskbar and in Alt+Tab window
  • dragging using left mouse button: changing of windows' sizes (see the demonstration)
  • when the Scroll Lock key is turned on stop tracking the mouse
• Hints:
  • transparency:
    • #define _WIN32_WINNT 0x0500
      przed
      #include <windows.h>
    • WS_EX_LAYERED
    • SetLayeredWindowAttributes()
  • WM_TIMER
  • WM_MOVING
  • GetCursorPos(), WM_LBUTTONDOWN, WM_LBUTTONUP, WM_MOUSEMOVE, SetCapture()
  • WM_SETCURSOR, SetCursor(), LoadCursor()
  • GetKeyState(), WM_CHAR

• Approximate points:
  • 4 windows: 1.0
  • positions and changing of the size: 2.0
  • tracking the mouse cursor (also checking the state of Scroll Lock key): 2.5
  • preventing from moving windows independently: 0.5
  • system menu : 0.5
  • background color: 0.5
  • always on top: 0.5
  • only on window visible on the taskbar: 0.5
  • transparency (also changing of transparency): 2.0