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reactos/base/applications/mspaint/selection.cpp

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/*
* PROJECT: PAINT for ReactOS
* LICENSE: LGPL
* FILE: base/applications/mspaint/selection.cpp
* PURPOSE: Window procedure of the selection window
* PROGRAMMERS: Benedikt Freisen
* Katayama Hirofumi MZ
*/
/* INCLUDES *********************************************************/
#include "precomp.h"
/* FUNCTIONS ********************************************************/
const LPCTSTR CSelectionWindow::m_lpszCursorLUT[9] = { /* action to mouse cursor lookup table */
IDC_SIZEALL,
IDC_SIZENWSE, IDC_SIZENS, IDC_SIZENESW,
IDC_SIZEWE, IDC_SIZEWE,
IDC_SIZENESW, IDC_SIZENS, IDC_SIZENWSE
};
BOOL
ColorKeyedMaskBlt(HDC hdcDest, int nXDest, int nYDest, int nWidth, int nHeight, HDC hdcSrc, int nXSrc, int nYSrc, HBITMAP hbmMask, int xMask, int yMask, DWORD dwRop, COLORREF keyColor)
{
HDC hTempDC;
HDC hTempDC2;
HBITMAP hTempBm;
HBRUSH hTempBrush;
HBITMAP hTempMask;
hTempDC = CreateCompatibleDC(hdcSrc);
hTempDC2 = CreateCompatibleDC(hdcSrc);
hTempBm = CreateCompatibleBitmap(hTempDC, nWidth, nHeight);
SelectObject(hTempDC, hTempBm);
hTempBrush = CreateSolidBrush(keyColor);
SelectObject(hTempDC, hTempBrush);
BitBlt(hTempDC, 0, 0, nWidth, nHeight, hdcSrc, nXSrc, nYSrc, SRCCOPY);
PatBlt(hTempDC, 0, 0, nWidth, nHeight, PATINVERT);
hTempMask = CreateBitmap(nWidth, nHeight, 1, 1, NULL);
SelectObject(hTempDC2, hTempMask);
BitBlt(hTempDC2, 0, 0, nWidth, nHeight, hTempDC, 0, 0, SRCCOPY);
SelectObject(hTempDC, hbmMask);
BitBlt(hTempDC2, 0, 0, nWidth, nHeight, hTempDC, xMask, yMask, SRCAND);
MaskBlt(hdcDest, nXDest, nYDest, nWidth, nHeight, hdcSrc, nXSrc, nYSrc, hTempMask, xMask, yMask, dwRop);
DeleteDC(hTempDC);
DeleteDC(hTempDC2);
DeleteObject(hTempBm);
DeleteObject(hTempBrush);
DeleteObject(hTempMask);
return TRUE;
}
void
ForceRefreshSelectionContents()
{
if (selectionWindow.IsWindowVisible())
{
selectionWindow.SendMessage(WM_LBUTTONDOWN, 0, MAKELPARAM(0, 0));
selectionWindow.SendMessage(WM_MOUSEMOVE, 0, MAKELPARAM(0, 0));
selectionWindow.SendMessage(WM_LBUTTONUP, 0, MAKELPARAM(0, 0));
}
}
int CSelectionWindow::IdentifyCorner(int iXPos, int iYPos, int iWidth, int iHeight)
{
if (iYPos < 3)
{
if (iXPos < 3)
return ACTION_RESIZE_TOP_LEFT;
if ((iXPos < iWidth / 2 + 2) && (iXPos >= iWidth / 2 - 1))
return ACTION_RESIZE_TOP;
if (iXPos >= iWidth - 3)
return ACTION_RESIZE_TOP_RIGHT;
}
if ((iYPos < iHeight / 2 + 2) && (iYPos >= iHeight / 2 - 1))
{
if (iXPos < 3)
return ACTION_RESIZE_LEFT;
if (iXPos >= iWidth - 3)
return ACTION_RESIZE_RIGHT;
}
if (iYPos >= iHeight - 3)
{
if (iXPos < 3)
return ACTION_RESIZE_BOTTOM_LEFT;
if ((iXPos < iWidth / 2 + 2) && (iXPos >= iWidth / 2 - 1))
return ACTION_RESIZE_BOTTOM;
if (iXPos >= iWidth - 3)
return ACTION_RESIZE_BOTTOM_RIGHT;
}
return 0;
}
LRESULT CSelectionWindow::OnPaint(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
if (!m_bMoving)
{
HDC hDC = GetDC();
DefWindowProc(WM_PAINT, wParam, lParam);
SelectionFrame(hDC, 1, 1, selectionModel.GetDestRectWidth() * toolsModel.GetZoom() / 1000 + 5,
selectionModel.GetDestRectHeight() * toolsModel.GetZoom() / 1000 + 5,
m_dwSystemSelectionColor);
ReleaseDC(hDC);
}
return 0;
}
LRESULT CSelectionWindow::OnEraseBkgnd(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
// do nothing => transparent background
return 0;
}
LRESULT CSelectionWindow::OnCreate(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
m_bMoving = FALSE;
m_iAction = ACTION_MOVE;
/* update the system selection color */
m_dwSystemSelectionColor = GetSysColor(COLOR_HIGHLIGHT);
SendMessage(WM_PAINT, 0, MAKELPARAM(0, 0));
return 0;
}
LRESULT CSelectionWindow::OnSysColorChange(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
/* update the system selection color */
m_dwSystemSelectionColor = GetSysColor(COLOR_HIGHLIGHT);
SendMessage(WM_PAINT, 0, MAKELPARAM(0, 0));
return 0;
}
LRESULT CSelectionWindow::OnSetCursor(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
SetCursor(LoadCursor(NULL, IDC_SIZEALL));
return 0;
}
LRESULT CSelectionWindow::OnLButtonDown(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
m_ptPos.x = GET_X_LPARAM(lParam);
m_ptPos.y = GET_Y_LPARAM(lParam);
m_ptDelta.x = 0;
m_ptDelta.y = 0;
SetCapture();
if (m_iAction != ACTION_MOVE)
SetCursor(LoadCursor(NULL, m_lpszCursorLUT[m_iAction]));
m_bMoving = TRUE;
scrlClientWindow.InvalidateRect(NULL, TRUE);
imageArea.SendMessage(WM_PAINT, 0, 0);
return 0;
}
LRESULT CSelectionWindow::OnMouseMove(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
if (m_bMoving)
{
imageModel.ResetToPrevious();
m_ptFrac.x += GET_X_LPARAM(lParam) - m_ptPos.x;
m_ptFrac.y += GET_Y_LPARAM(lParam) - m_ptPos.y;
m_ptDelta.x += m_ptFrac.x * 1000 / toolsModel.GetZoom();
m_ptDelta.y += m_ptFrac.y * 1000 / toolsModel.GetZoom();
if (toolsModel.GetZoom() < 1000)
{
m_ptFrac.x = 0;
m_ptFrac.y = 0;
}
else
{
m_ptFrac.x -= (m_ptFrac.x * 1000 / toolsModel.GetZoom()) * toolsModel.GetZoom() / 1000;
m_ptFrac.y -= (m_ptFrac.y * 1000 / toolsModel.GetZoom()) * toolsModel.GetZoom() / 1000;
}
selectionModel.ModifyDestRect(m_ptDelta, m_iAction);
CString strSize;
strSize.Format(_T("%d x %d"), selectionModel.GetDestRectWidth(), selectionModel.GetDestRectHeight());
SendMessage(hStatusBar, SB_SETTEXT, 2, (LPARAM) (LPCTSTR) strSize);
if (toolsModel.GetActiveTool() == TOOL_TEXT)
{
selectionModel.DrawTextToolText(imageModel.GetDC(), paletteModel.GetFgColor(), paletteModel.GetBgColor(), toolsModel.IsBackgroundTransparent());
}
else
{
if (m_iAction != ACTION_MOVE)
selectionModel.DrawSelectionStretched(imageModel.GetDC());
else
selectionModel.DrawSelection(imageModel.GetDC(), paletteModel.GetBgColor(), toolsModel.IsBackgroundTransparent());
}
imageArea.InvalidateRect(NULL, FALSE);
imageArea.SendMessage(WM_PAINT, 0, 0);
m_ptPos.x = GET_X_LPARAM(lParam);
m_ptPos.y = GET_Y_LPARAM(lParam);
}
else
{
int w = selectionModel.GetDestRectWidth() * toolsModel.GetZoom() / 1000 + 6;
int h = selectionModel.GetDestRectHeight() * toolsModel.GetZoom() / 1000 + 6;
m_ptPos.x = GET_X_LPARAM(lParam);
m_ptPos.y = GET_Y_LPARAM(lParam);
SendMessage(hStatusBar, SB_SETTEXT, 2, (LPARAM) NULL);
m_iAction = IdentifyCorner(m_ptPos.x, m_ptPos.y, w, h);
if (m_iAction != ACTION_MOVE)
SetCursor(LoadCursor(NULL, m_lpszCursorLUT[m_iAction]));
}
return 0;
}
LRESULT CSelectionWindow::OnLButtonUp(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
if (m_bMoving)
{
m_bMoving = FALSE;
ReleaseCapture();
if (m_iAction != ACTION_MOVE)
{
if (toolsModel.GetActiveTool() == TOOL_TEXT)
{
// FIXME: What to do?
}
else
{
selectionModel.ScaleContentsToFit();
}
}
placeSelWin();
ShowWindow(SW_HIDE);
ShowWindow(SW_SHOW);
}
return 0;
}
LRESULT CSelectionWindow::OnCaptureChanged(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
if (m_bMoving)
{
m_bMoving = FALSE;
if (m_iAction == ACTION_MOVE)
{
// FIXME: dirty hack
placeSelWin();
imageModel.Undo();
imageModel.Undo();
}
else
{
m_iAction = ACTION_MOVE;
}
ShowWindow(SW_HIDE);
}
return 0;
}
LRESULT CSelectionWindow::OnKeyDown(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
if (wParam == VK_ESCAPE)
{
if (GetCapture() == m_hWnd)
{
ReleaseCapture();
}
}
return 0;
}
LRESULT CSelectionWindow::OnPaletteModelColorChanged(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
if (toolsModel.GetActiveTool() == TOOL_TEXT)
ForceRefreshSelectionContents();
return 0;
}
LRESULT CSelectionWindow::OnToolsModelSettingsChanged(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
if (toolsModel.GetActiveTool() == TOOL_FREESEL ||
toolsModel.GetActiveTool() == TOOL_RECTSEL ||
toolsModel.GetActiveTool() == TOOL_TEXT)
ForceRefreshSelectionContents();
return 0;
}
LRESULT CSelectionWindow::OnSelectionModelRefreshNeeded(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
ForceRefreshSelectionContents();
return 0;
}
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