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/*****************************************************************************
* * Graph.c - This module handles the graphing window. * * Microsoft Confidential * Copyright (c) 1992-1993 Microsoft Corporation * * ****************************************************************************/
/*
File Contents:
This file contains the code for creating and manipulating the graph window. This window is a child of hWndMain and represents one of the three "views" of the program. The other views are log and alert.
The graph window is actually just a container window, whose surface is completely filled by its children: hWndGraphDisplay, , hWndGraphLegend, and hWndGraphStatus. Therefore much of this file is merely calls to the appropriate functions for these children.
The graph window is responsible for the graph structure itself, however. Conceptually this should be instance data for the graph window. Right now, however, there is only one window and only one graph structure. Nevertheless, we go through the GraphData(hWnd) function to get a pointer to the graph structure for the graph window. */
//==========================================================================//
// Includes //
//==========================================================================//
#include "perfmon.h"
#include "graph.h"
#include "grafdisp.h"
#include "legend.h"
#include "valuebar.h"
#include "utils.h" // for WindowShow
//==========================================================================//
// Constants //
//==========================================================================//
//=============================//
// Graph Class //
//=============================//
TCHAR szGraphWindowClass[] = TEXT("PerfGraph") ;#define dwGraphClassStyle (CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS)
#define iGraphClassExtra (0)
#define iGraphWindowExtra (0)
#define dwGraphWindowStyle (WS_CHILD)
//==========================================================================//
// Local Functions //
//==========================================================================//
void static OnCreate (HWND hWnd) { // OnCreate
hWndGraphDisplay = CreateGraphDisplayWindow (hWnd) ; hWndGraphLegend = CreateGraphLegendWindow (hWnd) ; hWndGraphStatus = CreateGraphStatusWindow (hWnd) ; } // OnCreate
void static OnPaint (HWND hWnd) { HDC hDC ; PAINTSTRUCT ps ;
hDC = BeginPaint (hWnd, &ps) ; EndPaint (hWnd, &ps) ; }
void static OnSize (HWND hWnd, int xWidth, int yHeight) { // OnSize
SizeGraphComponents (hWnd) ; } // OnSize
//==========================================================================//
// Message Handlers //
//==========================================================================//
LRESULT APIENTRY GraphWndProc (HWND hWnd, WORD wMsg, DWORD wParam, LONG lParam) { // GraphWndProc
BOOL bCallDefProc ; LRESULT lReturnValue ;
bCallDefProc = FALSE ; lReturnValue = 0L ;
switch (wMsg) { // switch
case WM_CREATE: OnCreate (hWnd) ; break ;
case WM_LBUTTONDBLCLK: SendMessage (hWndMain, WM_LBUTTONDBLCLK, wParam, lParam) ; break ;
case WM_PAINT: OnPaint (hWnd) ; break ;
case WM_SIZE: OnSize (hWnd, LOWORD (lParam), HIWORD (lParam)) ; break ;
default: bCallDefProc = TRUE ; } // switch
if (bCallDefProc) lReturnValue = DefWindowProc (hWnd, wMsg, wParam, lParam) ;
return (lReturnValue); } // GraphWndProc
BOOL GraphInitializeApplication (void)/*
Note: There is no background brush set for the MainWindow class so that the main window is never erased. The client area of MainWindow is always covered by one of the view windows. If we erase it, it would just flicker needlessly.*/ { // GraphInitializeApplication
BOOL bSuccess ; WNDCLASS wc ;
//=============================//
// Register GraphWindow class //
//=============================//
wc.style = dwGraphClassStyle ; wc.lpfnWndProc = (WNDPROC) GraphWndProc ; wc.hInstance = hInstance ; wc.cbClsExtra = iGraphWindowExtra ; wc.cbWndExtra = iGraphClassExtra ; wc.hIcon = NULL ; wc.hCursor = LoadCursor(NULL, IDC_ARROW) ; wc.hbrBackground = NULL ; // see note above
wc.lpszMenuName = NULL ; wc.lpszClassName = szGraphWindowClass ;
bSuccess = RegisterClass (&wc) ;
//=============================//
// Register Child classes //
//=============================//
if (bSuccess) bSuccess = GraphDisplayInitializeApplication () ;
if (bSuccess) bSuccess = GraphLegendInitializeApplication () ; if (bSuccess) bSuccess = GraphStatusInitializeApplication () ;
return (bSuccess) ; } // GraphInitializeApplication
HWND CreateGraphWindow (HWND hWndParent)/*
Effect: Create the graph window. This window is a child of hWndMain and is a container for the graph data, graph label, graph legend, and graph status windows.
Note: We dont worry about the size here, as this window will be resized whenever the main window is resized.
*/ { return (CreateWindow (szGraphWindowClass, // window class
NULL, // caption
dwGraphWindowStyle, // style for window
0, 0, // initial position
0, 0, // initial size
hWndParent, // parent
NULL, // menu
hInstance, // program instance
NULL)) ; // user-supplied data
}
void SizeGraphComponents (HWND hWnd)/*
Effect: Move and show the various components of the graph to fill the size (xWidth x yHeight). Take into account whether the user wants to show the legend or status bars. Also take into account if we have room for these items.
Internals: If the user doesn't want the status or legend windows, they aren't shown. Also, if the user wanted the status window but not the legend window, the status window is not shown.
We may disregard the user's desire for the legend or status bar if there is not room. In particular, a legend window has a minimum width (LegendMinWidth ()) and a minimum height (LegendMinHeight ()). These values are fixed for a given session of perfmon. It also has a preferred height, which takes into consideration the size of the graph window and the number of items in the legend. This value is returned by LegendHeight(). We don't show the legend if its minimum height would take up more than half the graph height.
If we feel we don't have room for the legend, we don't show the status window either.
See Also: LegendMinWidth, LegendMinHeight, LegendHeight, ValuebarHeight.
Called By: OnSize, any other function that may remove or add one of the graph components.*/ { // SizeGraphComponents
RECT rectClient ; BOOL bShowLegend ; BOOL bShowStatus ; int yStatusHeight ; int yLegendHeight ; int xWidth ; int yHeight ;
GetClientRect (hWnd, &rectClient) ; xWidth = rectClient.right - rectClient.left ; yHeight = rectClient.bottom - rectClient.top ;
// if the graph window has no size, neither will its children.
if (!xWidth || !yHeight) return ;
//=============================//
// Show the Legend Window? //
//=============================//
if (!pGraphs->gOptions.bLegendChecked) bShowLegend = FALSE ; else if (xWidth < LegendMinWidth (hWndGraphLegend)) bShowLegend = FALSE ; else if (yHeight < 5 * LegendMinHeight (hWndGraphLegend)) bShowLegend = FALSE ; else bShowLegend = TRUE ;
//=============================//
// Show the Status Window? //
//=============================//
if (!pGraphs->gOptions.bStatusBarChecked) bShowStatus = FALSE ; else if (!bShowLegend) bShowStatus = FALSE ; else bShowStatus = TRUE ;
yStatusHeight = bShowStatus ? ValuebarHeight (hWndGraphStatus) : 0 ; yLegendHeight = bShowLegend ? LegendHeight (hWndGraphLegend, yHeight) : 0 ;
//=============================//
// Update the status window //
//=============================//
if (bShowStatus) MoveWindow (hWndGraphStatus, 0, yHeight - yStatusHeight - yLegendHeight, xWidth, yStatusHeight, TRUE) ; WindowShow (hWndGraphStatus, bShowStatus) ;
//=============================//
// Update the legend window //
//=============================//
if (bShowLegend) MoveWindow (hWndGraphLegend, 0, yHeight - yLegendHeight, xWidth, yLegendHeight, TRUE) ; WindowShow (hWndGraphLegend, bShowLegend) ;
//=============================//
// Update the display window //
//=============================//
MoveWindow (hWndGraphDisplay, 0, 0, xWidth, yHeight - yStatusHeight - yLegendHeight, TRUE) ; SizeGraphDisplayComponents (hWndGraphDisplay) ; WindowInvalidate (hWndGraphDisplay) ; WindowShow (hWndGraphDisplay, TRUE) ; } // SizeGraphComponents
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