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