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reactos/base/applications/mspaint/selection.c
Amine Khaldi ddb3d908c9 * Sync up to trunk HEAD (r62285). Branch guys deserve the significant speedups too ;) 
svn path=/branches/shell-experiments/; revision=62286
2014-02-22 10:31:26 +00:00

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/*
* PROJECT: PAINT for ReactOS
* LICENSE: LGPL
* FILE: base/applications/paint/selection.c
* PURPOSE: Window procedure of the selection window
* PROGRAMMERS: Benedikt Freisen
*/
/* INCLUDES *********************************************************/
#include "precomp.h"
/* DEFINES **********************************************************/
#define ACTION_MOVE 0
#define ACTION_RESIZE_TOP_LEFT 1
#define ACTION_RESIZE_TOP 2
#define ACTION_RESIZE_TOP_RIGHT 3
#define ACTION_RESIZE_LEFT 4
#define ACTION_RESIZE_RIGHT 5
#define ACTION_RESIZE_BOTTOM_LEFT 6
#define ACTION_RESIZE_BOTTOM 7
#define ACTION_RESIZE_BOTTOM_RIGHT 8
/* FUNCTIONS ********************************************************/
LPCTSTR cursors[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 moving = FALSE;
int action = ACTION_MOVE;
POINTS pos;
POINTS frac;
POINT delta;
void
RegisterWclSelection()
{
WNDCLASSEX wclSelection;
/* initializing and registering the window class for the selection frame */
wclSelection.hInstance = hProgInstance;
wclSelection.lpszClassName = _T("Selection");
wclSelection.lpfnWndProc = SelectionWinProc;
wclSelection.style = CS_DBLCLKS;
wclSelection.cbSize = sizeof(WNDCLASSEX);
wclSelection.hIcon = NULL;
wclSelection.hIconSm = NULL;
wclSelection.hCursor = LoadCursor(NULL, IDC_SIZEALL);
wclSelection.lpszMenuName = NULL;
wclSelection.cbClsExtra = 0;
wclSelection.cbWndExtra = 0;
wclSelection.hbrBackground = NULL;
RegisterClassEx (&wclSelection);
}
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 (IsWindowVisible(hSelection))
{
SendMessage(hSelection, WM_LBUTTONDOWN, 0, MAKELPARAM(0, 0));
SendMessage(hSelection, WM_MOUSEMOVE, 0, MAKELPARAM(0, 0));
SendMessage(hSelection, WM_LBUTTONUP, 0, MAKELPARAM(0, 0));
}
}
int
identifyCorner(short x, short y, short w, short h)
{
if (y < 3)
{
if (x < 3)
return ACTION_RESIZE_TOP_LEFT;
if ((x < w / 2 + 2) && (x >= w / 2 - 1))
return ACTION_RESIZE_TOP;
if (x >= w - 3)
return ACTION_RESIZE_TOP_RIGHT;
}
if ((y < h / 2 + 2) && (y >= h / 2 - 1))
{
if (x < 3)
return ACTION_RESIZE_LEFT;
if (x >= w - 3)
return ACTION_RESIZE_RIGHT;
}
if (y >= h - 3)
{
if (x < 3)
return ACTION_RESIZE_BOTTOM_LEFT;
if ((x < w / 2 + 2) && (x >= w / 2 - 1))
return ACTION_RESIZE_BOTTOM;
if (x >= w - 3)
return ACTION_RESIZE_BOTTOM_RIGHT;
}
return 0;
}
LRESULT CALLBACK
SelectionWinProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_PAINT:
{
if (!moving)
{
HDC hDC = GetDC(hwnd);
DefWindowProc(hwnd, message, wParam, lParam);
SelectionFrame(hDC, 1, 1, RECT_WIDTH(rectSel_dest) * zoom / 1000 + 5,
RECT_HEIGHT(rectSel_dest) * zoom / 1000 + 5);
ReleaseDC(hwnd, hDC);
}
break;
}
case WM_LBUTTONDOWN:
pos.x = GET_X_LPARAM(lParam);
pos.y = GET_Y_LPARAM(lParam);
delta.x = 0;
delta.y = 0;
SetCapture(hwnd);
if (action != ACTION_MOVE)
SetCursor(LoadCursor(NULL, cursors[action]));
moving = TRUE;
InvalidateRect(hScrlClient, NULL, TRUE);
break;
case WM_MOUSEMOVE:
if (moving)
{
TCHAR sizeStr[100];
POINT deltaUsed;
resetToU1();
frac.x += GET_X_LPARAM(lParam) - pos.x;
frac.y += GET_Y_LPARAM(lParam) - pos.y;
delta.x += frac.x * 1000 / zoom;
delta.y += frac.y * 1000 / zoom;
if (zoom < 1000)
{
frac.x = 0;
frac.y = 0;
}
else
{
frac.x -= (frac.x * 1000 / zoom) * zoom / 1000;
frac.y -= (frac.y * 1000 / zoom) * zoom / 1000;
}
switch (action)
{
case ACTION_MOVE: /* move selection */
deltaUsed.x = delta.x;
deltaUsed.y = delta.y;
OffsetRect(&rectSel_dest, deltaUsed.x, deltaUsed.y);
break;
case ACTION_RESIZE_TOP_LEFT: /* resize at upper left corner */
deltaUsed.x = min(delta.x, RECT_WIDTH(rectSel_dest) - 1);
deltaUsed.y = min(delta.y, RECT_HEIGHT(rectSel_dest) - 1);
rectSel_dest.left += deltaUsed.x;
rectSel_dest.top += deltaUsed.y;
break;
case ACTION_RESIZE_TOP: /* resize at top edge */
deltaUsed.x = delta.x;
deltaUsed.y = min(delta.y, RECT_HEIGHT(rectSel_dest) - 1);
rectSel_dest.top += deltaUsed.y;
break;
case ACTION_RESIZE_TOP_RIGHT: /* resize at upper right corner */
deltaUsed.x = max(delta.x, -(RECT_WIDTH(rectSel_dest) - 1));
deltaUsed.y = min(delta.y, RECT_HEIGHT(rectSel_dest) - 1);
rectSel_dest.top += deltaUsed.y;
rectSel_dest.right += deltaUsed.x;
break;
case ACTION_RESIZE_LEFT: /* resize at left edge */
deltaUsed.x = min(delta.x, RECT_WIDTH(rectSel_dest) - 1);
deltaUsed.y = delta.y;
rectSel_dest.left += deltaUsed.x;
break;
case ACTION_RESIZE_RIGHT: /* resize at right edge */
deltaUsed.x = max(delta.x, -(RECT_WIDTH(rectSel_dest) - 1));
deltaUsed.y = delta.y;
rectSel_dest.right += deltaUsed.x;
break;
case ACTION_RESIZE_BOTTOM_LEFT: /* resize at lower left corner */
deltaUsed.x = min(delta.x, RECT_WIDTH(rectSel_dest) - 1);
deltaUsed.y = max(delta.y, -(RECT_HEIGHT(rectSel_dest) - 1));
rectSel_dest.left += deltaUsed.x;
rectSel_dest.bottom += deltaUsed.y;
break;
case ACTION_RESIZE_BOTTOM: /* resize at bottom edge */
deltaUsed.x = delta.x;
deltaUsed.y = max(delta.y, -(RECT_HEIGHT(rectSel_dest) - 1));
rectSel_dest.bottom += deltaUsed.y;
break;
case ACTION_RESIZE_BOTTOM_RIGHT: /* resize at lower right corner */
deltaUsed.x = max(delta.x, -(RECT_WIDTH(rectSel_dest) - 1));
deltaUsed.y = max(delta.y, -(RECT_HEIGHT(rectSel_dest) - 1));
rectSel_dest.right += deltaUsed.x;
rectSel_dest.bottom += deltaUsed.y;
break;
}
delta.x -= deltaUsed.x;
delta.y -= deltaUsed.y;
_stprintf(sizeStr, _T("%d x %d"), RECT_WIDTH(rectSel_dest), RECT_HEIGHT(rectSel_dest));
SendMessage(hStatusBar, SB_SETTEXT, 2, (LPARAM) sizeStr);
if (activeTool == TOOL_TEXT)
{
Text(hDrawingDC, rectSel_dest.left, rectSel_dest.top, rectSel_dest.right, rectSel_dest.bottom, fgColor, bgColor, textToolText, hfontTextFont, transpBg);
}
else
{
if (action != ACTION_MOVE)
StretchBlt(hDrawingDC, rectSel_dest.left, rectSel_dest.top, RECT_WIDTH(rectSel_dest), RECT_HEIGHT(rectSel_dest), hSelDC, 0, 0, GetDIBWidth(hSelBm), GetDIBHeight(hSelBm), SRCCOPY);
else
if (transpBg == 0)
MaskBlt(hDrawingDC, rectSel_dest.left, rectSel_dest.top, RECT_WIDTH(rectSel_dest), RECT_HEIGHT(rectSel_dest),
hSelDC, 0, 0, hSelMask, 0, 0, MAKEROP4(SRCCOPY, SRCAND));
else
{
ColorKeyedMaskBlt(hDrawingDC, rectSel_dest.left, rectSel_dest.top, RECT_WIDTH(rectSel_dest), RECT_HEIGHT(rectSel_dest),
hSelDC, 0, 0, hSelMask, 0, 0, MAKEROP4(SRCCOPY, SRCAND), bgColor);
}
}
InvalidateRect(hImageArea, NULL, FALSE);
pos.x = GET_X_LPARAM(lParam);
pos.y = GET_Y_LPARAM(lParam);
}
else
{
int w = RECT_WIDTH(rectSel_dest) * zoom / 1000 + 6;
int h = RECT_HEIGHT(rectSel_dest) * zoom / 1000 + 6;
pos.x = GET_X_LPARAM(lParam);
pos.y = GET_Y_LPARAM(lParam);
SendMessage(hStatusBar, SB_SETTEXT, 2, (LPARAM) NULL);
action = identifyCorner(pos.x, pos.y, w, h);
if (action != ACTION_MOVE)
SetCursor(LoadCursor(NULL, cursors[action]));
}
break;
case WM_LBUTTONUP:
if (moving)
{
moving = FALSE;
ReleaseCapture();
if (action != ACTION_MOVE)
{
if (activeTool == TOOL_TEXT)
{
}
else
{
HDC hTempDC;
HBITMAP hTempBm;
hTempDC = CreateCompatibleDC(hSelDC);
hTempBm = CreateDIBWithProperties(RECT_WIDTH(rectSel_dest), RECT_HEIGHT(rectSel_dest));
SelectObject(hTempDC, hTempBm);
SelectObject(hSelDC, hSelBm);
StretchBlt(hTempDC, 0, 0, RECT_WIDTH(rectSel_dest), RECT_HEIGHT(rectSel_dest), hSelDC, 0, 0,
GetDIBWidth(hSelBm), GetDIBHeight(hSelBm), SRCCOPY);
DeleteObject(hSelBm);
hSelBm = hTempBm;
hTempBm = CreateBitmap(RECT_WIDTH(rectSel_dest), RECT_HEIGHT(rectSel_dest), 1, 1, NULL);
SelectObject(hTempDC, hTempBm);
SelectObject(hSelDC, hSelMask);
StretchBlt(hTempDC, 0, 0, RECT_WIDTH(rectSel_dest), RECT_HEIGHT(rectSel_dest), hSelDC, 0, 0,
GetDIBWidth(hSelMask), GetDIBHeight(hSelMask), SRCCOPY);
DeleteObject(hSelMask);
hSelMask = hTempBm;
SelectObject(hSelDC, hSelBm);
DeleteDC(hTempDC);
}
}
placeSelWin();
ShowWindow(hSelection, SW_HIDE);
ShowWindow(hSelection, SW_SHOW);
}
break;
default:
return DefWindowProc(hwnd, message, wParam, lParam);
}
return 0;
}
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