807 lines
20 KiB
C++
807 lines
20 KiB
C++
/*++
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Copyright (C) 1996-1999 Microsoft Corporation
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Module Name:
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intrvbar.cpp
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Abstract:
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Implementation of the interval bar control.
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--*/
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//==========================================================================//
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// Includes //
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//==========================================================================//
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#include <windows.h>
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#include <assert.h>
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#include <limits.h>
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#include "globals.h"
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#include "winhelpr.h"
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#include "utils.h"
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#include "intrvbar.h"
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//==========================================================================//
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// Constants //
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//==========================================================================//
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#define dwILineClassStyle (CS_HREDRAW | CS_VREDRAW)
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#define dwILineWindowStyle (WS_CHILD | WS_VISIBLE)
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#define TO_THE_END 0x7FFFFFFFL
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#define szILineClass TEXT("IntervalBar")
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//==========================================================================//
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// Macros //
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//==========================================================================//
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// Width of the start and stob grab bars
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#define ILGrabWidth() \
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(10)
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#define ILGrabMinimumWidth() \
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(6)
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// A rectangle is "drawable" if it has both nonzero height and minimum width
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#define PRectDrawable(lpRect) \
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((lpRect->right - lpRect->left) >= ILGrabMinimumWidth()) && \
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(lpRect->bottom - lpRect->top)
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#define RectDrawable(Rect) \
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((Rect.right - Rect.left) >= ILGrabMinimumWidth()) && \
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(Rect.bottom - Rect.top)
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//==========================================================================//
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// Local Functions //
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//==========================================================================//
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void
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CIntervalBar::NotifyChange (
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void
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)
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{
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HWND hWndParent ;
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hWndParent = WindowParent (m_hWnd) ;
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if (hWndParent)
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SendMessage (hWndParent, WM_COMMAND,
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(WPARAM) WindowID (m_hWnd),
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(LPARAM) m_hWnd) ;
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}
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BOOL
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CIntervalBar::GrabRect (
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OUT LPRECT lpRect
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)
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{
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switch (m_iMode) {
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case ModeLeft:
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*lpRect = m_rectLeftGrab ;
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return (TRUE) ;
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break ;
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case ModeRight:
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*lpRect = m_rectRightGrab ;
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return (TRUE) ;
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break ;
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case ModeCenter:
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*lpRect = m_rectCenterGrab ;
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return (TRUE) ;
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break ;
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case ModeNone:
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lpRect->left = 0 ;
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lpRect->top = 0 ;
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lpRect->right = 0 ;
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lpRect->bottom = 0 ;
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return (FALSE) ;
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break ;
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default:
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return (FALSE);
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}
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}
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void
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CIntervalBar::DrawGrab (
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HDC hDC,
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LPRECT lpRectGrab,
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BOOL bDown
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)
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{
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if (!PRectDrawable(lpRectGrab))
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return ;
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Fill(hDC, GetSysColor(COLOR_3DFACE), lpRectGrab);
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DrawEdge (hDC, lpRectGrab, (bDown ? EDGE_SUNKEN:EDGE_RAISED), BF_RECT);
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}
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INT
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CIntervalBar::ValueToPixel (
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INT iValue
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)
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{
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INT xPixel ;
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if (m_iEndValue > m_iBeginValue)
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xPixel = MulDiv (iValue, m_rectBorder.right, (m_iEndValue - m_iBeginValue)) ;
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else
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xPixel = 0 ;
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return (PinExclusive (xPixel, 0, m_rectBorder.right)) ;
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}
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INT
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CIntervalBar::PixelToValue (
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INT xPixel
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)
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{
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INT iValue ;
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if (m_rectBorder.right)
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iValue = MulDiv (xPixel, (m_iEndValue - m_iBeginValue), m_rectBorder.right) ;
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else
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iValue = 0 ;
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return (PinInclusive (iValue, m_iBeginValue, m_iEndValue)) ;
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}
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void
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CIntervalBar::CalcPositions (
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void
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)
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/*
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Effect: Determine and set all of the physical rectangles of ILine,
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based on the current size of the ILine window and the
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current logical Start, Stop, Begin, and End values.
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*/
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{
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INT xStart, xStop ;
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INT yHeight ;
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GetClientRect (m_hWnd, &m_rectBorder) ;
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yHeight = m_rectBorder.bottom ;
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xStart = ValueToPixel (m_iStartValue) ;
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xStop = ValueToPixel (m_iStopValue) ;
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m_rectLeftBk.left = 1 ;
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m_rectLeftBk.top = 1 ;
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m_rectLeftBk.right = xStart ;
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m_rectLeftBk.bottom = yHeight - 1 ;
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m_rectLeftGrab.left = xStart ;
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m_rectLeftGrab.top = 1 ;
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m_rectLeftGrab.right = xStart + ILGrabWidth () ;
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m_rectLeftGrab.bottom = yHeight - 1 ;
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m_rectRightBk.left = xStop ;
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m_rectRightBk.top = 1 ;
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m_rectRightBk.right = m_rectBorder.right - 1 ;
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m_rectRightBk.bottom = yHeight - 1 ;
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m_rectRightGrab.left = xStop - ILGrabWidth () ;
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m_rectRightGrab.top = 1 ;
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m_rectRightGrab.right = xStop ;
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m_rectRightGrab.bottom = yHeight - 1 ;
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m_rectCenterGrab.left = m_rectLeftGrab.right ;
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m_rectCenterGrab.top = 1 ;
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m_rectCenterGrab.right = m_rectRightGrab.left ;
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m_rectCenterGrab.bottom = yHeight - 1 ;
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if (m_rectLeftGrab.right > m_rectRightGrab.left) {
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m_rectLeftGrab.right = m_rectLeftGrab.left + (xStop - xStart) / 2 ;
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m_rectRightGrab.left = m_rectLeftGrab.right ;
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m_rectCenterGrab.left = 0 ;
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m_rectCenterGrab.right = 0 ;
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// Ensure that at least one grab bar is visible when End > Begin and the total is
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// wide enough. ILGrabMinimumWidth + 2 is the minimum.
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// If on the left edge, make the Right grab visible.
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// If on the right edge, make the Left grab visible.
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// If in the middle, make them both visible.
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if ( !RectDrawable(m_rectLeftGrab)
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|| !RectDrawable(m_rectRightGrab) ) {
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INT iWidth = ILGrabMinimumWidth();
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if ( !RectDrawable(m_rectRightBk) ) {
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// Make the Left grab visible.
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m_rectRightGrab.left = m_rectRightGrab.right;
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m_rectLeftGrab.right = m_rectRightGrab.right;
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m_rectLeftGrab.left = m_rectLeftGrab.right - iWidth;
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} else if (!RectDrawable(m_rectLeftBk) ) {
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// Make the Right grab visible.
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m_rectLeftGrab.right = m_rectLeftGrab.left;
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m_rectRightGrab.left = m_rectLeftGrab.left;
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m_rectRightGrab.right = m_rectRightGrab.left + iWidth;
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} else {
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// Make them both visible.
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m_rectLeftGrab.left -= iWidth;
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m_rectRightGrab.right += iWidth;
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}
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}
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}
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}
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void
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CIntervalBar::Draw (
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HDC hDC,
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LPRECT // lpRectUpdate
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)
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/*
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Effect: Draw the image of pILine on hDC. Draw at least the
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portions within rectUpdate.
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Called By: OnPaint, OnMouseMove.
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*/
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{
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if (IsWindowEnabled(m_hWnd)) {
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FillRect (hDC, &m_rectLeftBk, m_hBrushBk) ;
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FillRect (hDC, &m_rectRightBk, m_hBrushBk) ;
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//DrawEdge (hDC, &m_rectBorder, BDR_SUNKENINNER, BF_RECT) ;
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DrawEdge (hDC, &m_rectBorder, EDGE_SUNKEN, BF_RECT) ;
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DrawGrab (hDC, &m_rectLeftGrab, m_iMode == ModeLeft) ;
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DrawGrab (hDC, &m_rectRightGrab, m_iMode == ModeRight) ;
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DrawGrab (hDC, &m_rectCenterGrab, m_iMode == ModeCenter) ;
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}
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else {
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Fill(hDC, GetSysColor(COLOR_3DFACE), &m_rectBorder);
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DrawEdge (hDC, &m_rectBorder, EDGE_SUNKEN, BF_RECT) ;
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}
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}
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void
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CIntervalBar::MoveLeftRight (
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BOOL bStart,
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BOOL bLeft,
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INT iMoveAmt
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)
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{
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INT iStart, iStop, iMove ;
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iStart = m_iStartValue;
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iStop = m_iStopValue;
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iMove = iMoveAmt ;
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if (bLeft)
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iMove = -iMove ;
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if (bStart)
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{
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if (iMoveAmt == TO_THE_END) {
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iStart = m_iBeginValue ;
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}
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else {
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iStart += iMove ;
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if (iStart >= iStop) {
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return;
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}
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}
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SetStart (iStart) ;
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}
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else {
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if (iMoveAmt == TO_THE_END) {
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iStop = m_iEndValue ;
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}
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else {
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iStop += iMove ;
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if (iStart >= iStop) {
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return;
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}
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}
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SetStop (iStop) ;
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}
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NotifyChange () ;
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}
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BOOL
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CIntervalBar::OnKeyDown (
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WPARAM wParam
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)
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{
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BOOL bHandle = TRUE ;
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BOOL bStart ;
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BOOL bLeftDirection ;
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BOOL bShiftKeyDown ;
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if (wParam == VK_LEFT || wParam == VK_RIGHT) {
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bShiftKeyDown = (GetKeyState (VK_SHIFT) < 0) ;
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if (!bShiftKeyDown) {
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if (wParam == VK_LEFT) {
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// Left Arrow --> move Start Edge Left
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bStart = TRUE ;
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bLeftDirection = TRUE ;
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}
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else {
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// Right Arrow --> move Stop Edge Right
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bStart = FALSE ;
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bLeftDirection = FALSE ;
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}
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}
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else {
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if (wParam == VK_LEFT) {
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// Shift Left Arrow --> move Stop Edge Left
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bStart = FALSE ;
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bLeftDirection = TRUE ;
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}
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else {
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// Shift Right Arrow --> move Start Edge Right
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bStart = TRUE ;
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bLeftDirection = FALSE ;
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}
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}
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MoveLeftRight (bStart, bLeftDirection, 1) ;
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}
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else if (wParam == VK_HOME) {
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// move iStart all the way the Left
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MoveLeftRight (TRUE, TRUE, TO_THE_END) ;
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}
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else if (wParam == VK_END) {
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// move iStop all the way the right
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MoveLeftRight (FALSE, FALSE, TO_THE_END) ;
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}
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else {
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bHandle = FALSE ;
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}
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return (bHandle) ;
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}
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void
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CIntervalBar::StartGrab (
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void
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)
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{
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RECT rectUpdate ;
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SetCapture (m_hWnd) ;
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GrabRect (&rectUpdate) ;
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Update();
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}
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void
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CIntervalBar::EndGrab (
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void
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)
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/*
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Internals: Set the mode to null after getting the grab rectangle
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so ILGrabRect knows which grab bar to get.
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*/
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{
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RECT rectUpdate ;
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ReleaseCapture () ;
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GrabRect (&rectUpdate) ;
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m_iMode = ModeNone ;
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Update();
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}
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//==========================================================================//
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// Message Handlers //
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//==========================================================================//
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CIntervalBar::CIntervalBar (
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void
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)
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{
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m_hWnd = NULL;
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m_iBeginValue = 0;
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m_iEndValue = 100;
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m_iStartValue = 0;
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m_iStopValue = 100;
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m_iMode = ModeNone;
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m_hBrushBk = NULL;
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}
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CIntervalBar::~CIntervalBar (
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void
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)
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{
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if (m_hWnd)
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DestroyWindow(m_hWnd);
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if (m_hBrushBk)
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DeleteBrush (m_hBrushBk);
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}
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BOOL
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CIntervalBar::Init (
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HWND hWndParent
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)
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{
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#define dwIntervalBarClassStyle (CS_HREDRAW | CS_VREDRAW)
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#define dwIntervalBarStyle (WS_CHILD | WS_VISIBLE)
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#define szIntervalBarClass TEXT("IntervalBar")
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// Register window class once
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if (pstrRegisteredClasses[INTRVBAR_WNDCLASS] == NULL) {
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WNDCLASS wc ;
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wc.style = dwILineClassStyle ;
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wc.lpfnWndProc = (WNDPROC)IntervalBarWndProc ;
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wc.cbClsExtra = 0 ;
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wc.cbWndExtra = sizeof(PCIntervalBar) ;
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wc.hInstance = g_hInstance ;
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wc.hIcon = NULL ;
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wc.hCursor = LoadCursor (NULL, IDC_ARROW) ;
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wc.hbrBackground = NULL ;
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wc.lpszMenuName = NULL ;
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wc.lpszClassName = szIntervalBarClass ;
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if (RegisterClass (&wc)) {
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pstrRegisteredClasses[INTRVBAR_WNDCLASS] = szIntervalBarClass;
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}
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else {
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return FALSE;
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}
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}
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// Create our window
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m_hWnd = CreateWindow (szIntervalBarClass, // class
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NULL, // caption
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dwIntervalBarStyle, // window style
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0, 0, // position
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0, 0, // size
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hWndParent, // parent window
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NULL, // menu
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g_hInstance, // program instance
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(LPVOID) this ); // user-supplied data
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if (m_hWnd == NULL) {
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return FALSE;
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}
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m_hBrushBk = CreateSolidBrush (GetSysColor(COLOR_SCROLLBAR)) ;
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CalcPositions () ;
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return TRUE;
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}
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void
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CIntervalBar::OnLButtonUp (
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void
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)
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{
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if (m_iMode == ModeNone)
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return ;
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EndGrab () ;
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}
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void
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CIntervalBar::OnMouseMove (
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POINTS ptsMouse
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)
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/*
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Effect: Handle any actions needed when the mouse moves in the
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ILine hWnd's client area or while the mouse is captured.
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In particular, if we are tracking one of the grab bars,
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determine if the mouse movement represents a logical value
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change and move the grab bar accordingly.
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Called By: ILineWndProc, in response to a WM_MOUSEMOVE message.
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See Also: OnLButtonDown, OnLButtonUp.
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Note: This function has multiple return points.
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Note: Since we have captured the mouse, we receive mouse msgs
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even when the mouse is outside our client area, but still
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in client coordinates. Thus we can have negative mouse
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coordinates. That is why we convert the lParam of the
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mouse msg into a POINTS structure rather than 2 WORDS.
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Internals: Remember that an IntervalLine can only take on integral
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values in the user-supplied range. Therefore we do our
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movement calculation in user values, not pixels. We
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determine what the logical value would be for the previous
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(last mouse move) and current mouse position. If these
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LOGICAL values differ, we attempt an adjustment of the
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grab bar by that logical amount. This way the grab
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values assume on integral positions and the calculations
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are simplified.
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If we calculated by pixel movement, and then shifted the
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bar into the nearest integal position, we would encounter
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rounding problems. In particular, when tracking the center
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grab bar, if we moved both start and stop by the same
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amount of PIXELS, then converted to LOGICAL values, we
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might find our center bar shrinking and growing while
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the bar moves.
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*/
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{
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INT iMousePrevious, iMouseCurrent ;
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INT iMouseMove ;
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// Are we tracking?
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if (m_iMode == ModeNone)
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return ;
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// Calc LOGICAL mouse movement
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assert ( USHRT_MAX >= m_rectBorder.left );
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assert ( USHRT_MAX >= m_rectBorder.right );
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ptsMouse.x = PinInclusive (ptsMouse.x,
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(SHORT)m_rectBorder.left,
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(SHORT)m_rectBorder.right) ;
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iMousePrevious = PixelToValue (m_ptsMouse.x) ;
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iMouseCurrent = PixelToValue (ptsMouse.x) ;
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iMouseMove = iMouseCurrent - iMousePrevious ;
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if (!iMouseMove)
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return ;
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// Move grab bar positions
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switch (m_iMode) {
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case ModeLeft:
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m_iStartValue += iMouseMove ;
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m_iStartValue = min (m_iStartValue, m_iStopValue - 1) ;
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break ;
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case ModeCenter:
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// Before we slide the center grab bar we need to see if the
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// desired movement amount would send either end out of bounds,
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// and reduce the movement accordingly.
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if (m_iStartValue + iMouseMove < m_iBeginValue)
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iMouseMove = m_iBeginValue - m_iStartValue ;
|
|
|
|
if (m_iStopValue + iMouseMove > m_iEndValue)
|
|
iMouseMove = m_iEndValue - m_iStopValue ;
|
|
|
|
m_iStartValue += iMouseMove ;
|
|
m_iStopValue += iMouseMove ;
|
|
break ;
|
|
|
|
case ModeRight:
|
|
m_iStopValue += iMouseMove ;
|
|
m_iStopValue = max (m_iStartValue + 1, m_iStopValue) ;
|
|
break ;
|
|
}
|
|
|
|
|
|
m_iStartValue = PinInclusive (m_iStartValue, m_iBeginValue, m_iEndValue) ;
|
|
m_iStopValue = PinInclusive (m_iStopValue, m_iBeginValue, m_iEndValue) ;
|
|
|
|
Update();
|
|
|
|
m_ptsMouse = ptsMouse ;
|
|
NotifyChange () ;
|
|
}
|
|
|
|
|
|
void
|
|
CIntervalBar::OnLButtonDown (
|
|
POINTS ptsMouse
|
|
)
|
|
{
|
|
POINT ptMouse ;
|
|
|
|
m_ptsMouse = ptsMouse ;
|
|
ptMouse.x = ptsMouse.x ;
|
|
ptMouse.y = ptsMouse.y ;
|
|
|
|
if (PtInRect (&m_rectLeftGrab, ptMouse) ||
|
|
PtInRect (&m_rectLeftBk, ptMouse)) {
|
|
m_iMode = ModeLeft ;
|
|
}
|
|
else if (PtInRect (&m_rectRightGrab, ptMouse) ||
|
|
PtInRect (&m_rectRightBk, ptMouse)) {
|
|
m_iMode = ModeRight ;
|
|
}
|
|
else if (PtInRect (&m_rectCenterGrab, ptMouse)) {
|
|
m_iMode = ModeCenter ;
|
|
}
|
|
|
|
if (m_iMode != ModeNone)
|
|
StartGrab();
|
|
}
|
|
|
|
void
|
|
CIntervalBar::Update (
|
|
void
|
|
)
|
|
{
|
|
HDC hDC;
|
|
// Determine pixel pos, draw
|
|
CalcPositions () ;
|
|
|
|
hDC = GetDC (m_hWnd) ;
|
|
if ( NULL != hDC ) {
|
|
Draw (hDC, &m_rectBorder) ;
|
|
ReleaseDC (m_hWnd, hDC) ;
|
|
}
|
|
}
|
|
|
|
//==========================================================================//
|
|
// Exported Functions //
|
|
//==========================================================================//
|
|
|
|
|
|
LRESULT APIENTRY IntervalBarWndProc (
|
|
HWND hWnd,
|
|
UINT uiMsg,
|
|
WPARAM wParam,
|
|
LPARAM lParam
|
|
)
|
|
/*
|
|
Note: This function must be declared in the application's
|
|
linker-definition file, perfmon.def file.
|
|
*/
|
|
{
|
|
PCIntervalBar pIntrvBar;
|
|
BOOL bCallDefWindowProc ;
|
|
POINTS ptsMouse ;
|
|
LRESULT lrsltReturnValue ;
|
|
|
|
bCallDefWindowProc = FALSE ;
|
|
lrsltReturnValue = 0L ;
|
|
|
|
if (uiMsg == WM_CREATE) {
|
|
pIntrvBar = (PCIntervalBar)((CREATESTRUCT*)lParam)->lpCreateParams;
|
|
} else {
|
|
pIntrvBar = (PCIntervalBar)GetWindowLongPtr (hWnd, 0);
|
|
}
|
|
|
|
switch (uiMsg) {
|
|
|
|
case WM_CREATE:
|
|
SetWindowLongPtr(hWnd, 0, (INT_PTR)pIntrvBar);
|
|
break ;
|
|
|
|
case WM_LBUTTONDOWN:
|
|
// See the note in OnMouseMove for why we are using POINTS
|
|
SetFocus (hWnd) ;
|
|
ptsMouse = MAKEPOINTS (lParam) ;
|
|
pIntrvBar->OnLButtonDown (ptsMouse) ;
|
|
break ;
|
|
|
|
case WM_LBUTTONUP:
|
|
pIntrvBar->OnLButtonUp () ;
|
|
break ;
|
|
|
|
case WM_SETFOCUS:
|
|
case WM_KILLFOCUS:
|
|
|
|
pIntrvBar->NotifyChange () ;
|
|
return 0 ;
|
|
|
|
case WM_ENABLE:
|
|
pIntrvBar->Update();
|
|
break;
|
|
|
|
case WM_MOUSEMOVE:
|
|
// See the note in OnMouseMove for why we are using POINTS
|
|
ptsMouse = MAKEPOINTS (lParam) ;
|
|
pIntrvBar->OnMouseMove (ptsMouse) ;
|
|
break ;
|
|
|
|
case WM_KEYDOWN:
|
|
if (!pIntrvBar->OnKeyDown (wParam)) {
|
|
bCallDefWindowProc = TRUE ;
|
|
}
|
|
break ;
|
|
|
|
case WM_GETDLGCODE:
|
|
// We want to handle Arrow keys input. If we don't specify this
|
|
// the dialog will not pass arrow keys to us.
|
|
return (DLGC_WANTARROWS) ;
|
|
break ;
|
|
|
|
case WM_PAINT:
|
|
{
|
|
PAINTSTRUCT ps ;
|
|
HDC hDC;
|
|
|
|
hDC = BeginPaint (hWnd, &ps) ;
|
|
pIntrvBar->Draw (hDC, &ps.rcPaint) ;
|
|
EndPaint (hWnd, &ps) ;
|
|
}
|
|
break ;
|
|
|
|
case WM_SIZE:
|
|
pIntrvBar->CalcPositions () ;
|
|
break;
|
|
|
|
default:
|
|
bCallDefWindowProc = TRUE ;
|
|
}
|
|
|
|
if (bCallDefWindowProc)
|
|
lrsltReturnValue = DefWindowProc (hWnd, uiMsg, wParam, lParam) ;
|
|
|
|
return (lrsltReturnValue) ;
|
|
}
|
|
|
|
|
|
void
|
|
CIntervalBar::SetRange (
|
|
INT iBegin,
|
|
INT iEnd
|
|
)
|
|
{
|
|
|
|
m_iBeginValue = iBegin;
|
|
m_iEndValue = iEnd;
|
|
|
|
Update();
|
|
}
|
|
|
|
|
|
void
|
|
CIntervalBar::SetStart (
|
|
INT iStart
|
|
)
|
|
{
|
|
m_iStartValue = PinInclusive (iStart, m_iBeginValue, m_iEndValue) ;
|
|
|
|
Update();
|
|
}
|
|
|
|
|
|
void
|
|
CIntervalBar::SetStop (
|
|
INT iStop
|
|
)
|
|
{
|
|
m_iStopValue = PinInclusive (iStop, m_iBeginValue, m_iEndValue) ;
|
|
|
|
Update();
|
|
}
|
|
|