base/applications/clipbrd/scrollutils.h

   1 /*
   2  * PROJECT:     ReactOS Clipboard Viewer
   3  * LICENSE:     GPL-2.0+ (https://spdx.org/licenses/GPL-2.0+)
   4  * PURPOSE:     Scrolling related helper functions.
   5  * COPYRIGHT:   Copyright 2015-2018 Ricardo Hanke
   6  *              Copyright 2015-2018 Hermes Belusca-Maito
   7  */
   8
   9 #pragma once
  10
  11 typedef struct _SCROLLSTATE
  12 {
  13     UINT uLinesToScroll;    /* Number of lines to scroll on one wheel rotation movement (== one "click" == WHEEL_DELTA ticks) */
  14     INT iWheelCarryoverX;   /* Unused wheel ticks (< WHEEL_DELTA) */
  15     INT iWheelCarryoverY;
  16     INT nPageX;             /* Number of lines per page */
  17     INT nPageY;
  18     INT CurrentX;           /* Current scrollbar position */
  19     INT CurrentY;
  20     INT MaxX;               /* Maximum scrollbar position */
  21     INT MaxY;
  22     INT nMaxWidth;          /* Maximum span of displayed data */
  23     INT nMaxHeight;
  24 } SCROLLSTATE, *LPSCROLLSTATE;
  25
  26 void OnKeyScroll(HWND hWnd, WPARAM wParam, LPARAM lParam, LPSCROLLSTATE state);
  27 void OnMouseScroll(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam, LPSCROLLSTATE state);
  28 void OnScroll(HWND hWnd, INT nBar, WPARAM wParam, INT iDelta, LPSCROLLSTATE state);
  29
  30 void UpdateLinesToScroll(LPSCROLLSTATE state);
  31 void UpdateWindowScrollState(HWND hWnd, INT nMaxWidth, INT nMaxHeight, LPSCROLLSTATE lpState);