5e8f669cc7
- AdvMessageBox dient zum Erzeugen einer eigenen MessageBox. Der MessageBox kann ein eigenes Icon übergeben werden. Die Anzahl der Buttons kann zwischen 1 und 4 geändert werden. Die Standard-Buttons lassen sich benutzerdefiniert beschriften
355 lines
12 KiB
C#
355 lines
12 KiB
C#
using System;
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using System.Text;
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using System.Drawing;
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using System.Windows.Forms;
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using System.Runtime.InteropServices;
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namespace MsdnMag
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{
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// *****************************************************************
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// Buttons combination
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public enum MyMessageBoxButtons
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{
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OK = 0,
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OKCancel = 1,
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AbortRetryIgnore = 2,
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YesNoCancel = 3,
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YesNo = 4,
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RetryCancel = 5,
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YesNoAllCancel = 6 // NEW
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}
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// *****************************************************************
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public class MessageBox
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{
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// *****************************************************************
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// Properties
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protected LocalCbtHook m_cbt;
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protected IntPtr m_handle = IntPtr.Zero;
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protected bool m_alreadySetup = false;
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// *****************************************************************
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// *****************************************************************
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public MessageBox()
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{
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m_cbt = new LocalCbtHook();
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m_cbt.WindowCreated += new LocalCbtHook.CbtEventHandler(WndCreated);
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m_cbt.WindowDestroyed += new LocalCbtHook.CbtEventHandler(WndDestroyed);
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m_cbt.WindowActivated += new LocalCbtHook.CbtEventHandler(WndActivated);
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}
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// *****************************************************************
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// *****************************************************************
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// PROPERTY IconFile
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private string m_iconFile = "";
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public string IconFile
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{
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get {return m_iconFile;}
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set {m_iconFile=value; m_iconIndex=0;}
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}
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// *****************************************************************
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// *****************************************************************
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// PROPERTY YesAllNoCancel
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public bool YesAllNoCancel = false;
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private const int IDALL = 9; // same as IDHELP in the Win32 API
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private const int MB_HELP = 0x00004000;
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// *****************************************************************
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// *****************************************************************
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// PROPERTY IconIndex
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private int m_iconIndex = 0;
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public int IconIndex
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{
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get {return m_iconIndex;}
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set {m_iconIndex=value;}
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}
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// *****************************************************************
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// *****************************************************************
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// Show
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public DialogResult Show(string text, string title, MessageBoxButtons buttons, MessageBoxIcon icon)
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{
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// If a custom icon is requested, ensure the window leaves room for
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// the icon... Add a fake icon
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if (IconFile.Length > 0 && icon == MessageBoxIcon.None)
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icon = MessageBoxIcon.Information;
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else
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IconFile = "";
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// Apply the changes needed if 4 buttons are required
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if (YesAllNoCancel)
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{
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m_cbt.Install();
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buttons = MessageBoxButtons.YesNoCancel;
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// Must use MessageBox API because of the 4th button
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int res = _MessageBox(GetActiveWindow(), text, title,
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(int) (buttons + (int) icon + MB_HELP));
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m_cbt.Uninstall();
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return (DialogResult) res;
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}
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// Go the default way
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m_cbt.Install();
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DialogResult dr = System.Windows.Forms.MessageBox.Show(text, title, buttons, icon);
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m_cbt.Uninstall();
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return dr;
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}
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public DialogResult Show(string text, string title, MessageBoxButtons buttons)
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{
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return Show(text, title, buttons, MessageBoxIcon.None);
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}
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public DialogResult Show(string text, string title)
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{
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return Show(text, title, MessageBoxButtons.OK, MessageBoxIcon.None);
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}
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public DialogResult Show(string text)
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{
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return Show(text, "", MessageBoxButtons.OK, MessageBoxIcon.None);
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}
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// *****************************************************************
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// *****************************************************************
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// WndCreated event handler
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private void WndCreated(object sender, CbtEventArgs e)
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{
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if (e.IsDialogWindow)
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{
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m_alreadySetup = false;
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Console.WriteLine("MessageBox created");
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m_handle = e.Handle;
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}
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}
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// *****************************************************************
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// *****************************************************************
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// WndDestroyed event handler
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private void WndDestroyed(object sender, CbtEventArgs e)
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{
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if (e.Handle == m_handle)
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{
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m_alreadySetup = false;
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m_handle = IntPtr.Zero;
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}
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}
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// *****************************************************************
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// *****************************************************************
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// WndActivated event handler
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private void WndActivated(object sender, CbtEventArgs e)
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{
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if (m_handle != e.Handle)
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return;
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// Not the first time
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if (m_alreadySetup)
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{
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Console.WriteLine("(Already configured. Not the first time it is activated!)");
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return;
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}
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else
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m_alreadySetup = true;
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//
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// Modify the MessageBox window
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//
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Console.WriteLine("MessageBox activated");
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// Replace the icon (0x0014 is the ID of the icon window)
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if (m_iconFile.Length >0)
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{
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IntPtr hwndIcon = GetDlgItem(m_handle, 0x0014);
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IntPtr hIcon = ExtractIcon(IntPtr.Zero, m_iconFile, m_iconIndex);
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SendMessage(hwndIcon, STM_SETICON, hIcon, IntPtr.Zero);
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}
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// Get the static window with the text and the text
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IntPtr hwndText = GetDlgItem(m_handle, 0xFFFF);
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StringBuilder sb = new StringBuilder();
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sb.Capacity = 256;
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GetWindowText(hwndText, sb, 256);
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string text = sb.ToString();
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// Get the window position
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RECT rc = new RECT();
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GetWindowRect(hwndText, rc);
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POINT pt = new POINT();
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pt.x = rc.left;
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pt.y = rc.top;
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ScreenToClient(m_handle, pt);
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// Create the alternate EDIT window
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IntPtr m_edit = CreateWindowEx(0, "edit", "", ES_READONLY|ES_MULTILINE|WS_CHILD|WS_VISIBLE,
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pt.x, pt.y, rc.right-rc.left, rc.bottom-rc.top,
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m_handle, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero);
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// Set font and text
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IntPtr hFont = SendMessage(hwndText, WM_GETFONT, IntPtr.Zero, IntPtr.Zero);
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SendMessage(m_edit, WM_SETFONT, hFont, new IntPtr(1));
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SetWindowText(m_edit, text);
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// Copy the displayed text to the clipboard
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Clipboard.SetDataObject(text);
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// Finalizing...
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DestroyWindow(hwndText);
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// Yes-All-No-Cancel setup
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// Map the YES-NO-CANCEL-HELP sequence to YES-OK-NO-CANCEL
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// The mapping has two steps: button text and button ID
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// No need to change the Yes button
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// Map button text
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SetWindowText(GetDlgItem(m_handle,(int) DialogResult.No), "OK to All");
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SetWindowText(GetDlgItem(m_handle,(int) DialogResult.Cancel), DialogResult.No.ToString());
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SetWindowText(GetDlgItem(m_handle,IDALL), DialogResult.Cancel.ToString());
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// Map button IDs
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SetWindowLong(GetDlgItem(m_handle,(int) DialogResult.No), GWL_ID, (int)DialogResult.OK);
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SetWindowLong(GetDlgItem(m_handle,(int) DialogResult.Cancel), GWL_ID, (int) DialogResult.No);
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SetWindowLong(GetDlgItem(m_handle,IDALL), GWL_ID, (int) DialogResult.Cancel);
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}
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// *****************************************************************
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#region Win32 Imports
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private const int ES_READONLY = 0x00000800;
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private const int ES_MULTILINE = 0x00000004;
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private const int WS_VISIBLE = 0x10000000;
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private const int WS_CHILD = 0x40000000;
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private const int WM_SETFONT = 0x00000030;
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private const int WM_GETFONT = 0x00000031;
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private const int STM_SETICON = 0x00000170;
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// ************************************************************************
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// Win32: GetClassName
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[DllImport("user32.dll")]
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protected static extern int GetClassName(IntPtr hwnd,
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StringBuilder lpClassName, int nMaxCount);
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// ************************************************************************
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// ************************************************************************
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// Win32: GetDlgItem
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[DllImport("user32.dll")]
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protected static extern IntPtr GetDlgItem(IntPtr hwnd, int id);
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// ************************************************************************
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// ************************************************************************
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// Win32: GetWindowText
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[DllImport("user32.dll")]
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protected static extern int GetWindowText(IntPtr hwnd,
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StringBuilder lpString, int nMaxCount);
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// ************************************************************************
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// ************************************************************************
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// Win32: SetWindowText
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[DllImport("user32.dll")]
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protected static extern bool SetWindowText(IntPtr hwnd, string text);
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// ************************************************************************
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// ************************************************************************
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// Win32: GetWindowRect
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[DllImport("user32.dll")]
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protected static extern int GetWindowRect(IntPtr hwnd, RECT rc);
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// ************************************************************************
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// ************************************************************************
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// Win32: ScreenToClient
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[DllImport("user32.dll")]
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protected static extern int ScreenToClient(IntPtr hwnd, POINT pt);
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// ************************************************************************
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// ************************************************************************
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// Win32: SetWindowLong
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protected const int GWL_ID = -12;
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[DllImport("user32.dll")]
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protected static extern int SetWindowLong(IntPtr hwnd,
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int index, int newValue);
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// ************************************************************************
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// ************************************************************************
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// Win32: ExtractIcon
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[DllImport("shell32.dll")]
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protected static extern IntPtr ExtractIcon(
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IntPtr hInst, // instance handle
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string lpszExeFileName, // file name
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int nIconIndex // icon index
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);
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// ************************************************************************
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// ************************************************************************
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// Win32: DestroyWindow
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[DllImport("user32.dll")]
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protected static extern void DestroyWindow(IntPtr hwnd);
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// ************************************************************************
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// ************************************************************************
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// Win32: MessageBox
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[DllImport("user32.dll", EntryPoint="MessageBox")]
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protected static extern int _MessageBox(IntPtr hwnd, string text, string caption,
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int options);
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// ************************************************************************
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// ************************************************************************
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// Win32: SendMessage
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[DllImport("user32.dll")]
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protected static extern IntPtr SendMessage(IntPtr hwnd,
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int msg, IntPtr wParam, IntPtr lParam);
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// ************************************************************************
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// ************************************************************************
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// Win32: GetActiveWindow
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[DllImport("user32.dll")]
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protected static extern IntPtr GetActiveWindow();
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// ************************************************************************
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// ************************************************************************
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// Win32: CreateWindowEx
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[DllImport("user32.dll")]
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protected static extern IntPtr CreateWindowEx(
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int dwExStyle, // extended window style
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string lpClassName, // registered class name
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string lpWindowName, // window name
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int dwStyle, // window style
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int x, // horizontal position of window
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int y, // vertical position of window
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int nWidth, // window width
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int nHeight, // window height
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IntPtr hWndParent, // handle to parent or owner window
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IntPtr hMenu, // menu handle or child identifier
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IntPtr hInstance, // handle to application instance
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IntPtr lpParam // window-creation data
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);
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// ************************************************************************
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// ************************************************************************
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// POINT
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[StructLayout(LayoutKind.Sequential)]
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public class POINT
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{
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public int x;
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public int y;
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}
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// ************************************************************************
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// ************************************************************************
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// RECT
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[StructLayout(LayoutKind.Sequential)]
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public class RECT
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{
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public int left;
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public int top;
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public int right;
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public int bottom;
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}
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// ************************************************************************
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#endregion
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}
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}
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