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BRUSHDLG.C
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1997-05-06
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// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
// PARTICULAR PURPOSE.
//
// Copyright (C) 1993 - 1995 Microsoft Corporation. All Rights Reserved.
//
// MODULE: brushdlg.c
//
// PURPOSE: Displays the "Brush Style" dialog box
//
// FUNCTIONS:
// BrushDlg - Process messages for "Brush Style" dialog box.
// MsgBrushInit - Initialize the Brush dialog with info from lparam.
// MsgBrushPaint - Paint the Example Window in the Brush dialog
// MsgBrushCommand - Process WM_COMMAND messages sent to the Brush dialog.
// CmdBrushStyle - Track the currently selected brush style.
// CmdBrushHatch - Track the currently selected hatch style.
// CmdBrushColor - Put up the ChooseColor dialog to select brush color.
// CmdBrushDone - Free the Brush dialog and related data.
//
// COMMENTS:
//
#include <windows.h> // required for all Windows applications
#include <windowsx.h>
#include "globals.h" // prototypes specific to this application
#include "brushdlg.h" // Controls ID's for the Brush dialog
#include "colordlg.h" // palette color dialog defines/prototypes
// global variables specific to this module
RECT rcExample; // location of example window in dialog
// prototypes specific to this module
LRESULT MsgBrushCommand (HWND, UINT, WPARAM, LPARAM);
LRESULT MsgBrushInit (HWND, UINT, WPARAM, LPARAM);
LRESULT MsgBrushPaint (HWND, UINT, WPARAM, LPARAM);
LRESULT CmdBrushStyle (HWND, WORD, WORD, HWND);
LRESULT CmdBrushHatch (HWND, WORD, WORD, HWND);
LRESULT CmdBrushColor (HWND, WORD, WORD, HWND);
LRESULT CmdBrushDone (HWND, WORD, WORD, HWND);
// Brush dialog message table definition.
MSD rgmsdBrush[] =
{
{WM_COMMAND, MsgBrushCommand},
{WM_PAINT, MsgBrushPaint},
{WM_INITDIALOG, MsgBrushInit}
};
MSDI msdiBrush =
{
sizeof(rgmsdBrush) / sizeof(MSD),
rgmsdBrush,
edwpNone
};
// Brush dialog command table definition.
CMD rgcmdBrush[] =
{
{IDD_SOLIDBRUSH, CmdBrushStyle}, // Brush Style notifications
{IDD_NULLBRUSH, CmdBrushStyle},
{IDD_HATCHBRUSH, CmdBrushStyle},
{IDD_HATCHSTYLE, CmdBrushHatch}, // Hatch Style notification
{IDD_BRUSHCOLOR, CmdBrushColor}, // Color button
{IDOK, CmdBrushDone}, // OK and Cancel buttons
{IDCANCEL, CmdBrushDone}
};
CMDI cmdiBrush =
{
sizeof(rgcmdBrush) / sizeof(CMD),
rgcmdBrush,
edwpNone
};
//
// FUNCTION: BrushDlg(HWND, UINT, WPARAM, LPARAM)
//
// PURPOSE: Processes messages for "Brush Style" dialog box.
//
// PARAMETERS:
// hdlg - window handle of the dialog box
// wMessage - type of message
// wparam - message-specific information
// lparam - message-specific information
//
// RETURN VALUE:
// TRUE - message handled
// FALSE - message not handled
//
// COMMENTS:
//
//
LRESULT CALLBACK BrushDlg(HWND hdlg, UINT uMessage, WPARAM wparam, LPARAM lparam)
{
return DispMessage(&msdiBrush, hdlg, uMessage, wparam, lparam);
}
//
// FUNCTION: MsgBrushCommand(HWND, UINT, WPARAM, LPARAM)
//
// PURPOSE: Process WM_COMMAND messages sent to the Brush dialog.
//
// PARAMETERS:
// hwnd - The window handing the message.
// uMessage - The message number. (unused).
// wparam - Message specific data (unused).
// lparam - Message specific data (unused).
//
// RETURN VALUE:
// Always returns 0 - message handled.
//
// COMMENTS:
// Uses this DipsCommand function defined in wndproc.c combined
// with the cmdiBrush structure defined in this file to handle
// the command messages for the Brush dialog box.
//
#pragma argsused
LRESULT MsgBrushCommand(HWND hwnd,
UINT uMessage,
WPARAM wparam,
LPARAM lparam)
{
return DispCommand(&cmdiBrush, hwnd, wparam, lparam);
}
//
// FUNCTION: MsgBrushInit(HWND, UINT, WPARAM, LPARAM)
//
// PURPOSE: To initialize the Brush dialog with info from lparam.
//
// PARAMETERS:
// hwnd - The window handing the message.
// uMessage - The message number. (unused).
// wparam - Message specific data (unused).
// lparam - points to LOGBRUSH structure.
//
// RETURN VALUE:
// Always returns TRUE
//
// COMMENTS:
// Sets the initial state of the controls according to the LOGBRUSH
// passed in via lparam.
//
#pragma argsused
LRESULT MsgBrushInit(HWND hdlg, UINT uMessage, WPARAM wparam, LPARAM lparam)
{
int i, nIndex, nSel;
HWND hctlHatch;
char szTmp[32];
LPLOGBRUSH lpLB;
// lparam is a pointer to a LOGBRUSH structure
lpLB = (LPLOGBRUSH)lparam;
// Save pointer to LOGBRUSH structure in window bytes
SetWindowLong(hdlg, DWL_USER, (LONG)lpLB);
// Check the correct brush style button
CheckRadioButton(hdlg,
IDD_BRUSHFIRST,
IDD_BRUSHLAST,
IDD_BRUSHSTYLE + lpLB->lbStyle);
// Fill up the hatch style combobox. The item data for each item is
// set to the hatch style value defined by Windows (e.g. HS_DIAGCROSS).
hctlHatch = GetDlgItem(hdlg, IDD_HATCHSTYLE);
nSel = 0;
for (i = IDD_HATCHFIRST; i <= IDD_HATCHLAST; i++)
{
LoadString(hInst, i, szTmp, sizeof(szTmp));
nIndex = SendMessage(hctlHatch, CB_ADDSTRING, 0, (LPARAM)(LPSTR)szTmp);
SendMessage(hctlHatch, CB_SETITEMDATA, nIndex, i - IDD_HATCHSTYLE);
// If this item is the current style, remember it
if (i == IDD_HATCHSTYLE + (int)lpLB->lbHatch)
nSel = nIndex;
}
// Set the initial hatch selection
SendMessage(hctlHatch, CB_SETCURSEL, nSel, 0L);
// Center the dialog over the application window
CenterWindow(hdlg, GetWindow(hdlg, GW_OWNER));
// Get coordinates of the example window in the dialog
GetWindowRect(GetDlgItem(hdlg, IDD_BRUSHEXAMPLE), &rcExample);
ScreenToClient(hdlg, (LPPOINT)&rcExample);
ScreenToClient(hdlg, ((LPPOINT)&rcExample) + 1);
// Reduce rect slightly so we don't paint over its frame
InflateRect(&rcExample, -1, -1);
return 1;
}
//
// FUNCTION: MsgBrushPaint(HWND, UINT, WPARAM, LPARAM)
//
// PURPOSE: Paint the example window with the current brush style
//
// PARAMETERS:
// hwnd - The window handling the message.
// uMessage - The message number. (unused).
// wparam - Message specific data (unused).
// lparam - Message specific data (unused).
//
// RETURN VALUE:
// Always returns TRUE
//
// COMMENTS:
//
#pragma argsused
LRESULT MsgBrushPaint(HWND hdlg, UINT uMessage, WPARAM wparam, LPARAM lparam)
{
PAINTSTRUCT ps;
LPLOGBRUSH lpLB;
HBRUSH hbr;
BeginPaint(hdlg, &ps);
// Select our logical palette for palette-relative colors to work
if (hPalette)
SelectPalette(ps.hdc, hPalette, TRUE);
// Get pointer to LOGBRUSH from window bytes
lpLB = (LPLOGBRUSH)GetWindowLong(hdlg, DWL_USER);
// Create brush from current LOGBRUSH
hbr = CreateBrushIndirect(lpLB);
// Paint the example window with the brush.
FillRect(ps.hdc, &rcExample, hbr);
// Don't need the brush any more
DeleteObject(hbr);
// De-select our logical palette from the DC
if (hPalette)
SelectPalette(ps.hdc, GetStockObject(DEFAULT_PALETTE), TRUE);
EndPaint(hdlg, &ps);
return 0;
}
//
// FUNCTION: CmdBrushStyle(HWND, WORD, WORD, HWND)
//
// PURPOSE: Keeps track of which style button is selected.
//
// PARAMETERS:
// hwnd - The window handling the command.
// wCommand - Child control ID.
// wNotify - Child notification code (unused).
// hwndCtrl - NULL (unused).
//
// RETURN VALUE:
// Always returns TRUE.
//
// COMMENTS:
//
#pragma argsused
LRESULT CmdBrushStyle(HWND hdlg, WORD wCommand, WORD wNotify, HWND hwndCtrl)
{
// Get pointer to LOGBRUSH from window bytes
LPLOGBRUSH lpLB = (LPLOGBRUSH)GetWindowLong(hdlg, DWL_USER);
// Save the style of the button that was just clicked
lpLB->lbStyle = wCommand - IDD_BRUSHSTYLE;
// Repaint the example window
InvalidateRect(hdlg, &rcExample, TRUE);
return TRUE;
}
//
// FUNCTION: CmdBrushHatch(HWND, WORD, WORD, HWND)
//
// PURPOSE: Keeps track of which hatch style is selected.
//
// PARAMETERS:
// hwnd - The window handling the command.
// wCommand - Child control ID (unused).
// wNotify - Child notification code.
// hwndCtrl - Handle to the Hatch Style combobox.
//
// RETURN VALUE:
// Always returns TRUE.
//
// COMMENTS:
//
#pragma argsused
LRESULT CmdBrushHatch(HWND hdlg, WORD wCommand, WORD wNotify, HWND hwndCtrl)
{
LPLOGBRUSH lpLB;
int nSel;
// Update the hatch style selection if necessary.
if (CBN_SELCHANGE == wNotify)
{
// Get pointer to LOGBRUSH from window bytes
lpLB = (LPLOGBRUSH)GetWindowLong(hdlg, DWL_USER);
nSel = SendMessage(hwndCtrl, CB_GETCURSEL, 0, 0L);
if (CB_ERR != nSel)
{
// Set brush style to hatched
lpLB->lbStyle = BS_HATCHED;
CheckRadioButton(hdlg,
IDD_BRUSHFIRST,
IDD_BRUSHLAST,
IDD_HATCHBRUSH);
// Save new hatch style
lpLB->lbHatch = SendMessage(hwndCtrl, CB_GETITEMDATA, nSel, 0L);
// Repaint the example window
InvalidateRect(hdlg, &rcExample, TRUE);
}
}
return TRUE;
}
//
// FUNCTION: CmdBrushColor(HWND, WORD, WORD, HWND)
//
// PURPOSE: Puts up ChooseColor dialog to choose brush color.
//
// PARAMETERS:
// hwnd - The window handling the command.
// wCommand - IDD_BRUSHCOLOR (unused).
// wNotify - Child notification code (unused).
// hwndCtrl - NULL (unused).
//
// RETURN VALUE:
// Always returns TRUE.
//
// COMMENTS:
//
#pragma argsused
LRESULT CmdBrushColor(HWND hdlg, WORD wCommand, WORD wNotify, HWND hwndCtrl)
{
LPLOGBRUSH lpLB;
static int nPalIndex=0; // stores system palette index for init'ing
// the palette color selection dialog
// Get pointer to LOGBRUSH from window bytes
lpLB = (LPLOGBRUSH)GetWindowLong(hdlg, DWL_USER);
if (bPalDevice)
{
// call palette dialog, passing nPalIndex as LPARAM to initialize
// the correct selection in the dialog
DialogBoxParam(hInst, "ColorDlg", hdlg, (DLGPROC)Color, (LPARAM)nPalIndex);
if (palinfo.index != -1)
{
// save index of color selection
nPalIndex = palinfo.index;
if (palinfo.index >= 10 && palinfo.index <= 245)
{
// Non-static color was chosen, so use PALETTERGB macro
// to save new color
lpLB->lbColor = PALETTERGB(palinfo.red, palinfo.green, palinfo.blue);
}
else
{
// Static color was chosen, so just use RGB macro
// to save new color
lpLB->lbColor = RGB(palinfo.red, palinfo.green, palinfo.blue);
}
// Repaint the example window
InvalidateRect(hdlg, &rcExample, TRUE);
}
}
else
{
CHOOSECOLOR cc;
static DWORD dwCustColors[16];
// Initialize CHOOSECOLOR struct
cc.lStructSize = sizeof(cc);
cc.hwndOwner = hdlg;
cc.hInstance = NULL;
cc.rgbResult = lpLB->lbColor;
cc.lpCustColors = dwCustColors;
cc.Flags = CC_RGBINIT;
cc.lCustData = 0;
cc.lpfnHook = NULL;
cc.lpTemplateName = NULL;
if (ChooseColor(&cc))
{
// Save new color
lpLB->lbColor = cc.rgbResult;
// Repaint the example window
InvalidateRect(hdlg, &rcExample, TRUE);
}
}
return TRUE;
}
//
// FUNCTION: CmdBrushDone(HWND, WORD, HWND)
//
// PURPOSE: Free the Brush dialog and related data.
//
// PARAMETERS:
// hwnd - The window handling the command.
// wCommand - The command to be handled.
// hwndCtrl - NULL (unused).
//
// RETURN VALUE:
// Always returns TRUE.
//
// COMMENTS:
// Calls EndDialog to finish the dialog session.
//
#pragma argsused
LRESULT CmdBrushDone(HWND hdlg, WORD wCommand, WORD wNotify, HWND hwndCtrl)
{
// Exit the dialog
EndDialog(hdlg, (IDOK == wCommand));
return TRUE;
}