Category : Files from Magazines
Archive : VOL10N06.ZIP
Filename : SELECT.C
Output of file : SELECT.C contained in archive : VOL10N06.ZIP
/* */
/* File : SELECT.C */
/* */
/* Purpose : Routines to implement an outline for dragging and stretching a */
/* graphical object. */
/* */
/* History : Most of this is from the SELECT example in the MS Win 3.0 SDK. */
/* */
/*===========================================================================*/
#include
#include "ico.h"
VOID PASCAL StartSelection(hWnd, ptCurrent, lpSelectRect, idTool)
HWND hWnd;
POINT ptCurrent;
LPRECT lpSelectRect;
int idTool;
{
if (lpSelectRect->left != lpSelectRect->right ||
lpSelectRect->top != lpSelectRect->bottom)
ClearSelection(hWnd, lpSelectRect, idTool);
lpSelectRect->left = ptCurrent.x;
lpSelectRect->top = ptCurrent.y;
lpSelectRect->right = ptCurrent.x;
lpSelectRect->bottom = ptCurrent.y;
SetCapture(hWnd);
}
VOID PASCAL UpdateSelection(hWnd, ptCurrent, lpSelectRect, idTool)
HWND hWnd;
POINT ptCurrent;
LPRECT lpSelectRect;
int idTool;
{
HDC hDC;
short OldROP;
hDC = GetDC(hWnd);
OldROP = SetROP2(hDC, R2_NOTXORPEN);
switch (idTool)
{
case ID_OPENRECT :
case ID_FILLRECT :
case ID_SELECT :
MoveTo(hDC, lpSelectRect->left, lpSelectRect->top);
LineTo(hDC, lpSelectRect->right, lpSelectRect->top);
LineTo(hDC, lpSelectRect->right, lpSelectRect->bottom);
LineTo(hDC, lpSelectRect->left, lpSelectRect->bottom);
LineTo(hDC, lpSelectRect->left, lpSelectRect->top);
LineTo(hDC, ptCurrent.x, lpSelectRect->top);
LineTo(hDC, ptCurrent.x, ptCurrent.y);
LineTo(hDC, lpSelectRect->left, ptCurrent.y);
LineTo(hDC, lpSelectRect->left, lpSelectRect->top);
break;
case ID_LINE :
MoveTo(hDC, lpSelectRect->left, lpSelectRect->top);
LineTo(hDC, lpSelectRect->right, lpSelectRect->bottom);
MoveTo(hDC, lpSelectRect->left, lpSelectRect->top);
LineTo(hDC, ptCurrent.x, ptCurrent.y);
break;
case ID_CIRCLE :
case ID_FILLCIRC :
MoveTo(hDC, lpSelectRect->left, lpSelectRect->top);
Ellipse(hDC, lpSelectRect->left, lpSelectRect->top,
lpSelectRect->right, lpSelectRect->bottom);
Ellipse(hDC, lpSelectRect->left, lpSelectRect->top,
ptCurrent.x, ptCurrent.y);
break;
}
SetROP2(hDC, OldROP);
lpSelectRect->right = ptCurrent.x;
lpSelectRect->bottom = ptCurrent.y;
ReleaseDC(hWnd, hDC);
}
VOID PASCAL EndSelection(ptCurrent, lpSelectRect)
POINT ptCurrent;
LPRECT lpSelectRect;
{
lpSelectRect->right = ptCurrent.x;
lpSelectRect->bottom = ptCurrent.y;
ReleaseCapture();
}
VOID PASCAL ClearSelection(hWnd, lpSelectRect, idTool)
HWND hWnd;
LPRECT lpSelectRect;
int idTool;
{
HDC hDC;
short OldROP;
hDC = GetDC(hWnd);
OldROP = SetROP2(hDC, R2_NOTXORPEN);
switch (idTool)
{
case ID_OPENRECT :
case ID_FILLRECT :
case ID_SELECT :
MoveTo(hDC, lpSelectRect->left, lpSelectRect->top);
LineTo(hDC, lpSelectRect->right, lpSelectRect->top);
LineTo(hDC, lpSelectRect->right, lpSelectRect->bottom);
LineTo(hDC, lpSelectRect->left, lpSelectRect->bottom);
LineTo(hDC, lpSelectRect->left, lpSelectRect->top);
break;
case ID_LINE :
MoveTo(hDC, lpSelectRect->left, lpSelectRect->top);
LineTo(hDC, lpSelectRect->right, lpSelectRect->bottom);
break;
case ID_CIRCLE :
case ID_FILLCIRC :
Ellipse(hDC, lpSelectRect->left, lpSelectRect->top,
lpSelectRect->right, lpSelectRect->bottom);
break;
}
SetROP2(hDC, OldROP);
ReleaseDC(hWnd, hDC);
}
VOID PASCAL SortRect(LPRECT lpRect)
{
int t;
if (lpRect->top > lpRect->bottom)
{
t = lpRect->top;
lpRect->top = lpRect->bottom;
lpRect->bottom = t;
}
if (lpRect->left > lpRect->right)
{
t = lpRect->left;
lpRect->left = lpRect->right;
lpRect->right = t;
}
}
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