572 lines
14 KiB
C++
572 lines
14 KiB
C++
/*
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* This is a part of the BugTrap package.
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* Copyright (c) 2005-2009 IntelleSoft.
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* All rights reserved.
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*
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* Description: Image view control class.
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* Author: Maksim Pyatkovskiy.
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*
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* This source code is only intended as a supplement to the
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* BugTrap package reference and related electronic documentation
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* provided with the product. See these sources for detailed
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* information regarding the BugTrap package.
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*/
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#include "StdAfx.h"
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#include "ImageView.h"
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#include "BugTrapUtils.h"
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#include "Globals.h"
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#ifdef _DEBUG
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#define new DEBUG_NEW
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#endif
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#define USE_MEM_DC
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#ifndef SPI_GETWHEELSCROLLLINES
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#define SPI_GETWHEELSCROLLLINES 0x0068
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#endif
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#ifndef SPI_SETWHEELSCROLLLINES
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#define SPI_SETWHEELSCROLLLINES 0x0069
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#endif
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/// Default number of wheel lines.
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static const DWORD g_dwDefaultNumWheels = 3;
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void CImageView::InitVars(void)
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{
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m_hwnd = NULL;
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m_pfnOldImageViewWndProc = NULL;
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m_lOldStyle = 0;
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m_nWheelLines = g_dwDefaultNumWheels;
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ResetImage();
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}
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/**
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* @param hdc - drawing conImage.
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* @param prcPaint - the rectangle where the painting is requested.
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*/
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void CImageView::DrawImageView(HDC hdc, const RECT* prcPaint)
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{
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_ASSERTE(g_pResManager != NULL);
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RECT rcClient;
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GetClientRect(m_hwnd, &rcClient);
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if (prcPaint == NULL)
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prcPaint = &rcClient;
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if (IsRectEmpty(prcPaint))
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return;
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#ifdef USE_MEM_DC
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int nClientWidth = prcPaint->right - prcPaint->left;
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int nClientHeight = prcPaint->bottom - prcPaint->top;
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HBITMAP hbmpMem;
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hbmpMem = CreateCompatibleBitmap(hdc, nClientWidth, nClientHeight);
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if (hbmpMem == NULL)
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return;
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HDC hdcMem;
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hdcMem = CreateCompatibleDC(hdc);
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if (hdcMem == NULL)
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{
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DeleteBitmap(hbmpMem);
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return;
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}
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SetViewportOrgEx(hdcMem, -prcPaint->left, -prcPaint->top, NULL);
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HBITMAP hbmpSafe = SelectBitmap(hdcMem, hbmpMem);
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#else
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// CS_PARENTDC sets the clipping rectangle of the child window to that of the parent window
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// so that the child can draw on the parent. Text view inherits this style from sub-classed
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// static control. This causes problems with unclipped TabbedTextOut() output.
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HRGN hrgn = CreateRectRgnIndirect(prcPaint);
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SelectClipRgn(hdc, hrgn);
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DeleteRgn(hrgn);
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HDC hdcMem = hdc;
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#endif
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FillRect(hdcMem, prcPaint, g_pResManager->m_hbrWindowBrush);
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HDC hdcTemp = CreateCompatibleDC(hdc);
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if (hdcTemp)
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{
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HBITMAP hbmpSafe2 = SelectBitmap(hdcTemp, m_hAdjustedBitmap);
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int nHorPos = GetScrollPos(m_hwnd, SB_HORZ);
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int nVertPos = GetScrollPos(m_hwnd, SB_VERT);
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int nImageLeft = rcClient.right > m_szAjustedBitmapSize.cx ? (rcClient.right - m_szAjustedBitmapSize.cx) / 2 : -nHorPos;
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int nImageTop = rcClient.bottom > m_szAjustedBitmapSize.cy ? (rcClient.bottom - m_szAjustedBitmapSize.cy) / 2 : -nVertPos;
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BitBlt(hdcMem, nImageLeft, nImageTop, m_szAjustedBitmapSize.cx, m_szAjustedBitmapSize.cy, hdcTemp, 0, 0, SRCCOPY);
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SelectBitmap(hdcTemp, hbmpSafe2);
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DeleteDC(hdcTemp);
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}
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#ifdef USE_MEM_DC
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BitBlt(hdc, prcPaint->left, prcPaint->top, nClientWidth, nClientHeight, hdcMem, prcPaint->left, prcPaint->top, SRCCOPY);
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SelectBitmap(hdcMem, hbmpSafe);
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DeleteDC(hdcMem);
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DeleteBitmap(hbmpMem);
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#endif
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}
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/**
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* @param bIgnoreScrollPos - pass true to disregard any existing scrollbar styles.
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*/
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void CImageView::ResizeImageView(BOOL bIgnoreScrollPos)
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{
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SCROLLINFO sinfo;
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RECT rcClient;
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GetClientRect(m_hwnd, &rcClient);
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ZeroMemory(&sinfo, sizeof(sinfo));
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sinfo.cbSize = sizeof(sinfo);
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if (! bIgnoreScrollPos)
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{
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sinfo.fMask = SIF_POS;
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GetScrollInfo(m_hwnd, SB_HORZ, &sinfo);
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}
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else
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sinfo.nPos = 0;
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sinfo.fMask = SIF_POS | SIF_PAGE | SIF_RANGE;
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sinfo.nMin = 0;
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sinfo.nMax = m_szAjustedBitmapSize.cx > 0 ? m_szAjustedBitmapSize.cx - 1 : 0;
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sinfo.nPage = rcClient.right;
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ValidateScrollInfo(&sinfo);
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SetScrollInfo(m_hwnd, SB_HORZ, &sinfo, TRUE);
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GetClientRect(m_hwnd, &rcClient);
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ZeroMemory(&sinfo, sizeof(sinfo));
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sinfo.cbSize = sizeof(sinfo);
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if (! bIgnoreScrollPos)
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{
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sinfo.fMask = SIF_POS;
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GetScrollInfo(m_hwnd, SB_VERT, &sinfo);
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}
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else
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sinfo.nPos = 0;
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sinfo.fMask = SIF_POS | SIF_PAGE | SIF_RANGE;
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sinfo.nMin = 0;
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sinfo.nMax = m_szAjustedBitmapSize.cy > 0 ? m_szAjustedBitmapSize.cy - 1 : 0;
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sinfo.nPage = rcClient.bottom;
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ValidateScrollInfo(&sinfo);
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SetScrollInfo(m_hwnd, SB_VERT, &sinfo, TRUE);
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InvalidateRect(m_hwnd, NULL, FALSE);
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}
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/**
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* @param nScrollBarType - scrollbar type.
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* @param nScrollCode - scroll code.
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*/
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void CImageView::ScrollImageView(int nScrollBarType, int nScrollCode)
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{
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_ASSERTE(nScrollBarType == SB_HORZ || nScrollBarType == SB_VERT);
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SCROLLINFO sinfo;
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ZeroMemory(&sinfo, sizeof(sinfo));
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sinfo.cbSize = sizeof(sinfo);
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sinfo.fMask = SIF_POS | SIF_PAGE | SIF_RANGE;
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if (nScrollCode == SB_THUMBTRACK)
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sinfo.fMask |= SIF_TRACKPOS;
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GetScrollInfo(m_hwnd, nScrollBarType, &sinfo);
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int nOldPos = sinfo.nPos;
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int nLineOffset = LOWORD(GetDialogBaseUnits());
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switch (nScrollCode)
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{
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case SB_LINEUP:
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//case SB_LINELEFT:
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sinfo.nPos -= nLineOffset;
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break;
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case SB_LINEDOWN:
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//case SB_LINERIGHT:
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sinfo.nPos += nLineOffset;
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break;
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case SB_PAGEUP:
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//case SB_PAGELEFT:
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sinfo.nPos -= sinfo.nPage;
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break;
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case SB_PAGEDOWN:
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//case SB_PAGERIGHT:
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sinfo.nPos += sinfo.nPage;
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break;
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case SB_THUMBTRACK:
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sinfo.nPos = sinfo.nTrackPos;
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break;
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case SB_TOP:
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//case SB_LEFT:
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sinfo.nPos = 0;
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break;
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case SB_BOTTOM:
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//case SB_RIGHT:
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sinfo.nPos = sinfo.nMax;
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break;
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default:
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return;
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}
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ValidateScrollInfo(&sinfo);
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sinfo.fMask = SIF_POS;
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SetScrollInfo(m_hwnd, nScrollBarType, &sinfo, TRUE);
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if (sinfo.nPos != nOldPos)
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{
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int nHorOffset, nVertOffset;
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if (nScrollBarType == SB_HORZ)
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{
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nHorOffset = nOldPos - sinfo.nPos;
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nVertOffset = 0;
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}
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else
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{
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nHorOffset = 0;
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nVertOffset = nOldPos - sinfo.nPos;
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}
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RECT rcClient;
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GetClientRect(m_hwnd, &rcClient);
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// Explicitly clip output to override style CS_PARENTDC.
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ScrollWindowEx(m_hwnd, nHorOffset, nVertOffset, &rcClient, &rcClient, NULL, NULL, SW_INVALIDATE);
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UpdateWindow(m_hwnd);
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}
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}
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/**
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* @param hwnd - window handle.
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* @param uMsg - message identifier.
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* @param wParam - first message parameter.
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* @param lParam - second message parameter.
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*/
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LRESULT CALLBACK CImageView::ImageViewWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
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{
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PAINTSTRUCT ps;
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HDC hdc;
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int zDelta, zTotal, nScrollCode, nScrollBarType;
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LONG lWindowStyle;
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CImageView* _this = (CImageView*)GetWindowLongPtr(hwnd, GWLP_USERDATA);
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_ASSERTE(_this != NULL);
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switch(uMsg)
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{
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case WM_LBUTTONDOWN:
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SetFocus(hwnd);
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return 0;
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case WM_ERASEBKGND:
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return TRUE;
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case WM_PAINT:
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hdc = (HDC)wParam;
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if (! hdc)
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{
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hdc = BeginPaint(hwnd, &ps);
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if (hdc)
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{
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_this->DrawImageView(hdc, &ps.rcPaint);
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EndPaint(hwnd, &ps);
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}
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}
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else
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_this->DrawImageView(hdc, NULL);
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return 0;
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case WM_PRINTCLIENT:
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hdc = (HDC)wParam;
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_this->DrawImageView(hdc, NULL);
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return 0;
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case WM_SIZE:
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_this->ResizeImageView(FALSE);
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return 0;
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case WM_KEYDOWN:
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switch (wParam)
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{
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case VK_LEFT:
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_this->ScrollImageView(SB_HORZ, SB_LINELEFT);
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break;
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case VK_UP:
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_this->ScrollImageView(SB_VERT, SB_LINEUP);
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break;
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case VK_RIGHT:
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_this->ScrollImageView(SB_HORZ, SB_LINERIGHT);
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break;
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case VK_DOWN:
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_this->ScrollImageView(SB_VERT, SB_LINEDOWN);
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break;
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case VK_HOME:
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if (GetKeyState(VK_CONTROL) < 0)
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_this->ScrollImageView(SB_VERT, SB_TOP);
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else
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_this->ScrollImageView(SB_HORZ, SB_LEFT);
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break;
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case VK_END:
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if (GetKeyState(VK_CONTROL) < 0)
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_this->ScrollImageView(SB_VERT, SB_BOTTOM);
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else
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_this->ScrollImageView(SB_HORZ, SB_RIGHT);
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break;
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case VK_PRIOR:
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_this->ScrollImageView(SB_VERT, SB_PAGEUP);
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break;
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case VK_NEXT:
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_this->ScrollImageView(SB_VERT, SB_PAGEDOWN);
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break;
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case VK_ADD:
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_this->ZoomIn();
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break;
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case VK_SUBTRACT:
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_this->ZoomOut();
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break;
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case VK_MULTIPLY:
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_this->FitImage();
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break;
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case VK_DIVIDE:
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case VK_NUMPAD0:
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case _T('0'):
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_this->ResetSize();
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break;
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}
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return 0;
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case WM_HSCROLL:
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_this->ScrollImageView(SB_HORZ, LOWORD(wParam));
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return 0;
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case WM_VSCROLL:
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_this->ScrollImageView(SB_VERT, LOWORD(wParam));
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return 0;
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case WM_MOUSEWHEEL:
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zDelta = (int)(short)HIWORD(wParam);
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if (_this->m_nWheelLines == WHEEL_PAGESCROLL)
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nScrollCode = zDelta > 0 ? SB_PAGEUP : SB_PAGEDOWN;
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else
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nScrollCode = zDelta > 0 ? SB_LINEUP : SB_LINEDOWN;
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zTotal = abs(zDelta) / WHEEL_DELTA;
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if (_this->m_nWheelLines != WHEEL_PAGESCROLL)
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zTotal *= _this->m_nWheelLines;
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lWindowStyle = GetWindowLong(hwnd, GWL_STYLE);
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if (lWindowStyle & WS_VSCROLL)
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nScrollBarType = SB_VERT;
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else if (lWindowStyle & WS_HSCROLL)
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nScrollBarType = SB_HORZ;
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else
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return 0;
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for (int i = 0; i < zTotal; ++i)
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_this->ScrollImageView(nScrollBarType, nScrollCode);
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return 0;
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case WM_SETTINGCHANGE:
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if (wParam == SPI_SETWHEELSCROLLLINES)
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{
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if (! SystemParametersInfo(SPI_GETWHEELSCROLLLINES, 0, &_this->m_nWheelLines, 0))
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_this->m_nWheelLines = g_dwDefaultNumWheels;
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}
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return 0;
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case WM_GETDLGCODE:
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return DLGC_WANTARROWS;
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default:
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return DefWindowProc(hwnd, uMsg, wParam, lParam);
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}
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}
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/**
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* @param hwnd - image view window handle.
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*/
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void CImageView::Attach(HWND hwnd)
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{
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_ASSERTE(hwnd != NULL);
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_ASSERTE(m_hwnd == NULL);
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_ASSERTE(g_pResManager != NULL);
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if (! SystemParametersInfo(SPI_GETWHEELSCROLLLINES, 0, &m_nWheelLines, 0))
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m_nWheelLines = g_dwDefaultNumWheels;
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m_hwnd = hwnd;
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m_pfnOldImageViewWndProc = SubclassWindow(hwnd, ImageViewWndProc);
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SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR)this);
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// Preserve original window styles that could be modified by SetScrollInfo().
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m_lOldStyle = GetWindowLong(hwnd, GWL_STYLE);
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ResizeImageView(TRUE);
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}
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void CImageView::Detach(void)
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{
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if (m_pfnOldImageViewWndProc)
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{
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SubclassWindow(m_hwnd, m_pfnOldImageViewWndProc);
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SetWindowLongPtr(m_hwnd, GWLP_USERDATA, NULL);
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SCROLLINFO sinfo;
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ZeroMemory(&sinfo, sizeof(sinfo));
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sinfo.cbSize = sizeof(sinfo);
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sinfo.fMask = SIF_POS | SIF_PAGE | SIF_RANGE;
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SetScrollInfo(m_hwnd, SB_HORZ, &sinfo, FALSE);
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SetScrollInfo(m_hwnd, SB_VERT, &sinfo, FALSE);
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SetWindowLong(m_hwnd, GWL_STYLE, m_lOldStyle);
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InvalidateRect(m_hwnd, NULL, TRUE);
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InitVars();
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}
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}
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/**
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* @param hBitmap - image handle.
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*/
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void CImageView::SetImage(HBITMAP hBitmap)
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{
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_ASSERTE(hBitmap != NULL);
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_ASSERTE(m_hBitmap == NULL);
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_ASSERTE(m_hwnd != NULL);
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m_hBitmap = hBitmap;
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BITMAP bmpInfo;
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GetObject(hBitmap, sizeof(bmpInfo), &bmpInfo);
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m_szBitmapSize.cx = bmpInfo.bmWidth;
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m_szBitmapSize.cy = bmpInfo.bmHeight;
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FitImage();
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}
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/**
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* @param prcClient - pointer to client rectangle.
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*/
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void CImageView::GetBiggestClientRect(RECT* prcClient)
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{
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GetWindowRect(m_hwnd, prcClient);
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prcClient->right -= prcClient->left;
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prcClient->left = 0;
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int nCXEdge = GetSystemMetrics(SM_CXEDGE) * 2;
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if (prcClient->right >= nCXEdge)
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prcClient->right -= nCXEdge;
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else
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prcClient->right = 0;
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prcClient->bottom -= prcClient->top;
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prcClient->top = 0;
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int nCYEdge = GetSystemMetrics(SM_CYEDGE) * 2;
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if (prcClient->bottom >= nCYEdge)
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prcClient->bottom -= nCYEdge;
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else
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prcClient->bottom = 0;
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}
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void CImageView::FitImage(void)
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{
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RECT rcClient;
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GetBiggestClientRect(&rcClient);
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if (rcClient.right < m_szBitmapSize.cx || rcClient.bottom < m_szBitmapSize.cy)
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{
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int nProduct1 = rcClient.right * m_szBitmapSize.cy;
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int nProduct2 = rcClient.bottom * m_szBitmapSize.cx;
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if (nProduct1 < nProduct2)
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{
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m_szAjustedBitmapSize.cx = rcClient.right;
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m_szAjustedBitmapSize.cy = nProduct1 / m_szBitmapSize.cx;
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}
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else
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{
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m_szAjustedBitmapSize.cx = nProduct2 / m_szBitmapSize.cy;
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m_szAjustedBitmapSize.cy = rcClient.bottom;
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}
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}
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else
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m_szAjustedBitmapSize = m_szBitmapSize;
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ResizeImage();
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ResizeImageView(TRUE);
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InvalidateRect(m_hwnd, NULL, FALSE);
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}
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void CImageView::ResetSize(void)
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{
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m_szAjustedBitmapSize = m_szBitmapSize;
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ResizeImage();
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ResizeImageView(TRUE);
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InvalidateRect(m_hwnd, NULL, FALSE);
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}
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void CImageView::ResetImage(void)
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{
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if (m_hAdjustedBitmap)
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{
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DeleteBitmap(m_hAdjustedBitmap);
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m_hAdjustedBitmap = NULL;
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}
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m_hBitmap = NULL;
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}
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void CImageView::ResizeImage(void)
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{
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if (m_hAdjustedBitmap)
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{
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DeleteBitmap(m_hAdjustedBitmap);
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m_hAdjustedBitmap = NULL;
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}
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HDC hdc = GetDC(m_hwnd);
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if (hdc)
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{
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HDC hdcSrc = CreateCompatibleDC(hdc);
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if (hdcSrc)
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{
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HBITMAP hbmpSafe = SelectBitmap(hdcSrc, m_hBitmap);
|
|
m_hAdjustedBitmap = CreateCompatibleBitmap(hdc, m_szAjustedBitmapSize.cx, m_szAjustedBitmapSize.cy);
|
|
if (m_hAdjustedBitmap)
|
|
{
|
|
HDC hdcDest = CreateCompatibleDC(hdc);
|
|
if (hdcDest)
|
|
{
|
|
HBITMAP hbmpSafe2 = SelectBitmap(hdcDest, m_hAdjustedBitmap);
|
|
StretchBlt(hdcDest, 0, 0, m_szAjustedBitmapSize.cx, m_szAjustedBitmapSize.cy, hdcSrc, 0, 0, m_szBitmapSize.cx, m_szBitmapSize.cy, SRCCOPY);
|
|
SelectBitmap(hdcDest, hbmpSafe2);
|
|
DeleteDC(hdcDest);
|
|
}
|
|
else
|
|
{
|
|
DeleteBitmap(m_hAdjustedBitmap);
|
|
m_hAdjustedBitmap = NULL;
|
|
}
|
|
}
|
|
SelectBitmap(hdcSrc, hbmpSafe);
|
|
DeleteDC(hdcSrc);
|
|
}
|
|
ReleaseDC(m_hwnd, hdc);
|
|
}
|
|
}
|
|
|
|
void CImageView::ZoomIn(void)
|
|
{
|
|
int nHorPos = GetScrollPos(m_hwnd, SB_HORZ);
|
|
int nVertPos = GetScrollPos(m_hwnd, SB_VERT);
|
|
float fltRatio = (float)m_szAjustedBitmapSize.cx / (float)m_szBitmapSize.cx * 3.0f / 2.0f;
|
|
SIZE szOldAjustedBitmapSize = m_szAjustedBitmapSize;
|
|
m_szAjustedBitmapSize.cx = (int)((float)m_szBitmapSize.cx * fltRatio);
|
|
m_szAjustedBitmapSize.cy = (int)((float)m_szBitmapSize.cy * fltRatio);
|
|
ResizeImage();
|
|
if (m_hAdjustedBitmap != NULL)
|
|
{
|
|
ResizeImageView(FALSE);
|
|
SetScrollPos(m_hwnd, SB_HORZ, nHorPos * 3 / 2, TRUE);
|
|
SetScrollPos(m_hwnd, SB_VERT, nVertPos * 3 / 2, TRUE);
|
|
InvalidateRect(m_hwnd, NULL, FALSE);
|
|
}
|
|
else
|
|
{
|
|
m_szAjustedBitmapSize = szOldAjustedBitmapSize;
|
|
ResizeImage();
|
|
}
|
|
}
|
|
|
|
void CImageView::ZoomOut(void)
|
|
{
|
|
if (m_szAjustedBitmapSize.cx > 3 && m_szAjustedBitmapSize.cy > 3)
|
|
{
|
|
int nHorPos = GetScrollPos(m_hwnd, SB_HORZ);
|
|
int nVertPos = GetScrollPos(m_hwnd, SB_VERT);
|
|
float fltRatio = (float)m_szAjustedBitmapSize.cx / (float)m_szBitmapSize.cx * 2.0f / 3.0f;
|
|
SIZE szOldAjustedBitmapSize = m_szAjustedBitmapSize;
|
|
m_szAjustedBitmapSize.cx = (int)((float)m_szBitmapSize.cx * fltRatio);
|
|
m_szAjustedBitmapSize.cy = (int)((float)m_szBitmapSize.cy * fltRatio);
|
|
ResizeImage();
|
|
if (m_hAdjustedBitmap != NULL)
|
|
{
|
|
ResizeImageView(FALSE);
|
|
SetScrollPos(m_hwnd, SB_HORZ, nHorPos * 2 / 3, TRUE);
|
|
SetScrollPos(m_hwnd, SB_VERT, nVertPos * 2 / 3, TRUE);
|
|
InvalidateRect(m_hwnd, NULL, FALSE);
|
|
}
|
|
else
|
|
{
|
|
m_szAjustedBitmapSize = szOldAjustedBitmapSize;
|
|
ResizeImage();
|
|
}
|
|
}
|
|
}
|