Return to readme CVS log

Up to [WindowsNT SDKs] / mstools / samples / wxform

Annotation of mstools/samples/wxform/readme, revision 1.1

1.1     ! root        1: Sample: World Coordinate Transformation
        !             2: 
        !             3: Summary:
        !             4: 
        !             5: The SDK sample named WXFORM provides a demonstration of the
        !             6: new world-coordinate transformation. This sample displays a
        !             7: rectangle in world coordinates and a matrix containing the
        !             8: transform values. Users can directly manipulate the
        !             9: rectangle and see the effect on the transformation, or they
        !            10: can set the transformation and see the effect on the
        !            11: rectangle.
        !            12: 
        !            13: More Information:
        !            14: 
        !            15: The program begins by setting the viewport origin to the
        !            16: center of the client area. It then draws a rectangle in
        !            17: world coordinate space from the point (0, 0) to the point
        !            18: (100, 100). The user can directly manipulate this rectangle
        !            19: by using the left and right mouse buttons. Specific actions
        !            20: are described more fully in the "Direct Manipulation Help"
        !            21: dialog box.
        !            22: 
        !            23: There is a second dialog box titled "World Transform." This
        !            24: shows the values of the eM11, eM12, eM21, eM22, eDx, and eDy
        !            25: fields in the XFORM structure retrieved by calling the
        !            26: GetWorldTransform function. By choosing the buttons on this
        !            27: dialog box, the user can cause a SetWorldTransform to occur
        !            28: in the program.
        !            29: 
        !            30: There are three coordinate systems of interest in this
        !            31: sample. The first one is the world coordinate system, which
        !            32: is new to Win32. These points are ultimately mapped to the
        !            33: second coordinate system, device coordinates, before being
        !            34: painted in the window. This program must also use a third
        !            35: coordinate system, screen coordinates, for certain
        !            36: interactions with the mouse pointer.
        !            37: 
        !            38: There is a third dialog box titled "Mouse Position" that
        !            39: shows the location of the cursor in all three of these
        !            40: coordinate systems. The device coordinates are relative to
        !            41: the upper-left corner of the client area. They are not
        !            42: relative to the viewport origin.
        !            43: 
        !            44: The following is a list of the Win32 API functions used in
        !            45: this sample:
        !            46: 
        !            47:    BeginPaint      GetDC             LocalFree        SelectObject
        !            48:    ClientToScreen  GetDlgItemtext    LocalHandle      SendMessage
        !            49:    CreateDialog    GetMessage        LPtoDP           SetCapture
        !            50:    CreatePen       GetStockObject    ModifyWorldTransform  SetClassLong
        !            51:    CreateWindow    GetViewportOrgEx  MoveToEx         SetCursorPos
        !            52:    DeleteObject    GetWorldTransform OffsetRect       SetDlgItemText
        !            53:    DispatchMessage InvalidateRect    PostQuitMessage  SetROP2
        !            54:    DPtoLP          LineTo            PtInRect         SetViewportOrgEx
        !            55:    EndPaint        LoadCursor        Rectangle        SetWorldTransform
        !            56:    GetClassLong    LoadIcon          ReleaseCapture   ShowWindow
        !            57:    GetClientRect   LocalAlloc        ReleaseDC        TranslateMessage
        !            58:                                                       UpdateWindow
        !            59: 
        !            60: 

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.