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ebe3d5273e
- Improve the scrolling support for bitmaps, DIBs and text formats. This completes the work started in CORE-10679 by Ricardo Hanke. Includes scrolling with the keyboard and the mouse wheel. - Add support for the CF_DSP* clipboard formats, as well as CF_TEXT and CF_OEMTEXT. - Add support for owner-display clipboard format CF_OWNERDISPLAY. - Realize any palette found in the clipboard (CF_PALETTE) before displaying the clipboard data format we want. - Remove dead code. - Update the file headers.
32 lines
1.3 KiB
C
32 lines
1.3 KiB
C
/*
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* PROJECT: ReactOS Clipboard Viewer
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* LICENSE: GPL-2.0+ (https://spdx.org/licenses/GPL-2.0+)
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* PURPOSE: Scrolling related helper functions.
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* COPYRIGHT: Copyright 2015-2018 Ricardo Hanke
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* Copyright 2015-2018 Hermes Belusca-Maito
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*/
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#pragma once
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typedef struct _SCROLLSTATE
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{
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UINT uLinesToScroll; /* Number of lines to scroll on one wheel rotation movement (== one "click" == WHEEL_DELTA ticks) */
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INT iWheelCarryoverX; /* Unused wheel ticks (< WHEEL_DELTA) */
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INT iWheelCarryoverY;
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INT nPageX; /* Number of lines per page */
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INT nPageY;
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INT CurrentX; /* Current scrollbar position */
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INT CurrentY;
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INT MaxX; /* Maximum scrollbar position */
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INT MaxY;
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INT nMaxWidth; /* Maximum span of displayed data */
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INT nMaxHeight;
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} SCROLLSTATE, *LPSCROLLSTATE;
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void OnKeyScroll(HWND hWnd, WPARAM wParam, LPARAM lParam, LPSCROLLSTATE state);
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void OnMouseScroll(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam, LPSCROLLSTATE state);
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void OnScroll(HWND hWnd, INT nBar, WPARAM wParam, INT iDelta, LPSCROLLSTATE state);
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void UpdateLinesToScroll(LPSCROLLSTATE state);
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void UpdateWindowScrollState(HWND hWnd, INT nMaxWidth, INT nMaxHeight, LPSCROLLSTATE lpState);
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