I've taken a piece from a custom Colordialog class and another piece of other custom Colordialog.
The first class have implemented the Title property.
This is the first class (The marked answer translated to VBNET) : How do I change the title of ColorDialog?
The second class have implemented the realtime pick of the colors.
This is the second class (The marked answer): Get color property while ColorDialog still open, before confirming the dialog?
Unafortunatelly for the Location property I don't know nothing about how to implement it into a dialog even been searched for a solution.
Well, now I'm trying to merge the two pieces of code to get a powerfull "default" ColorDialog.
The custom ColorDialog class translated to VB.NET with Title property is working but when I try to merge the two classes the title property is not working, I can change the title value in the property field but is not showing any title (the ColorDialog title is empty).
My question is what changes I need to make to this class to work properly the Title property and if how I can implement a "Location" property to easy relocate the ColorDialog over the screen if i desire, for example: MyColorDialog.Location = new point(), I've tried it time ago using the RECT structure.
This is the important part of the merged class where I made changes :
(The Title property things are regioned and commented in separate.)
Imports System.Runtime.InteropServices
Public Class Colordialog_Realtime
Inherits ColorDialog
#Region " Title property things"
<DllImport("user32.dll")> _
Private Shared Function SetWindowText(hWnd As IntPtr, lpString As String) As Boolean
End Function
Private m_title As String = String.Empty
Private titleSet As Boolean = False
Public Property Title() As String
Get
Return m_title
End Get
Set(value As String)
If value IsNot Nothing AndAlso value <> m_title Then
m_title = value
titleSet = False
End If
End Set
End Property
#End Region
Public Event CurrentColor(ByVal c As Color)
Private Const GA_ROOT As Integer = 2
Private Const WM_CTLCOLOREDIT As Integer = &H133
Public Declare Function GetAncestor Lib "user32.dll" _
(ByVal hWnd As IntPtr, ByVal gaFlags As Integer) As IntPtr
Private EditWindows As List(Of ApiWindow) = Nothing
Public Sub New()
' Me.FullOpen = True
End Sub
<System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
Protected Overrides Function HookProc(ByVal hWnd As IntPtr, ByVal msg As Integer, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As IntPtr
' Title property things"
If Not titleSet Then
SetWindowText(hWnd, m_title)
titleSet = True
End If
' End of title property things
Select Case msg
Case WM_CTLCOLOREDIT
If IsNothing(EditWindows) Then
Dim mainWindow As IntPtr = GetAncestor(hWnd, GA_ROOT)
If Not mainWindow.Equals(IntPtr.Zero) Then
EditWindows = New List(Of ApiWindow)((New WindowsEnumerator).GetChildWindows(mainWindow, "Edit"))
End If
End If
If Not IsNothing(EditWindows) AndAlso EditWindows.Count = 6 Then
Dim strRed As String = WindowsEnumerator.WindowText(EditWindows(3).hWnd)
Dim strGreen As String = WindowsEnumerator.WindowText(EditWindows(4).hWnd)
Dim strBlue As String = WindowsEnumerator.WindowText(EditWindows(5).hWnd)
Dim Red, Green, Blue As Integer
If Integer.TryParse(strRed, Red) Then
If Integer.TryParse(strGreen, Green) Then
If Integer.TryParse(strBlue, Blue) Then
RaiseEvent CurrentColor(Color.FromArgb(Red, Green, Blue))
End If
End If
End If
End If
End Select
Return MyBase.HookProc(hWnd, msg, wParam, lParam)
End Function
End Class
This are the other classes:
Class ApiWindow
Public hWnd As IntPtr
Public ClassName As String
Public MainWindowTitle As String
End Class
Class WindowsEnumerator
Private Delegate Function EnumCallBackDelegate(ByVal hwnd As IntPtr, ByVal lParam As Integer) As Integer
Private Declare Function EnumWindows Lib "user32" _
(ByVal lpEnumFunc As EnumCallBackDelegate, ByVal lParam As Integer) As Integer
Private Declare Function EnumChildWindows Lib "user32" _
(ByVal hWndParent As IntPtr, ByVal lpEnumFunc As EnumCallBackDelegate, ByVal lParam As Integer) As Integer
Private Declare Function GetClassName Lib "user32" Alias "GetClassNameA" _
(ByVal hwnd As IntPtr, ByVal lpClassName As System.Text.StringBuilder, ByVal nMaxCount As Integer) As Integer
Private Declare Function IsWindowVisible Lib "user32" (ByVal hwnd As IntPtr) As Integer
Private Declare Function GetParent Lib "user32" (ByVal hwnd As IntPtr) As Integer
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" _
(ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As Integer) As Integer
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" _
(ByVal hwnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As System.Text.StringBuilder) As Integer
Private _listChildren As New List(Of ApiWindow)
Private _listTopLevel As New List(Of ApiWindow)
Private _topLevelClass As String = String.Empty
Private _childClass As String = String.Empty
Public Overloads Function GetTopLevelWindows() As ApiWindow()
EnumWindows(AddressOf EnumWindowProc, &H0)
Return _listTopLevel.ToArray
End Function
Public Overloads Function GetTopLevelWindows(ByVal className As String) As ApiWindow()
_topLevelClass = className
Return Me.GetTopLevelWindows()
End Function
Public Overloads Function GetChildWindows(ByVal hwnd As Int32) As ApiWindow()
_listChildren.Clear()
EnumChildWindows(hwnd, AddressOf EnumChildWindowProc, &H0)
Return _listChildren.ToArray
End Function
Public Overloads Function GetChildWindows(ByVal hwnd As Int32, ByVal childClass As String) As ApiWindow()
_childClass = childClass
Return Me.GetChildWindows(hwnd)
End Function
Private Function EnumWindowProc(ByVal hwnd As Int32, ByVal lParam As Int32) As Int32
If GetParent(hwnd) = 0 AndAlso IsWindowVisible(hwnd) Then
Dim window As ApiWindow = GetWindowIdentification(hwnd)
If _topLevelClass.Length = 0 OrElse window.ClassName.ToLower() = _topLevelClass.ToLower() Then
_listTopLevel.Add(window)
End If
End If
Return 1
End Function
Private Function EnumChildWindowProc(ByVal hwnd As Int32, ByVal lParam As Int32) As Int32
Dim window As ApiWindow = GetWindowIdentification(hwnd)
If _childClass.Length = 0 OrElse window.ClassName.ToLower() = _childClass.ToLower() Then
_listChildren.Add(window)
End If
Return 1
End Function
Private Function GetWindowIdentification(ByVal hwnd As Integer) As ApiWindow
Dim classBuilder As New System.Text.StringBuilder(64)
GetClassName(hwnd, classBuilder, 64)
Dim window As New ApiWindow
window.ClassName = classBuilder.ToString()
window.MainWindowTitle = WindowText(hwnd)
window.hWnd = hwnd
Return window
End Function
Public Shared Function WindowText(ByVal hwnd As IntPtr) As String
Const W_GETTEXT As Integer = &HD
Const W_GETTEXTLENGTH As Integer = &HE
Dim SB As New System.Text.StringBuilder
Dim length As Integer = SendMessage(hwnd, W_GETTEXTLENGTH, 0, 0)
If length > 0 Then
SB = New System.Text.StringBuilder(length + 1)
SendMessage(hwnd, W_GETTEXT, SB.Capacity, SB)
End If
Return SB.ToString
End Function
End Class
Example usage:
Private Sub PicBox_Click(sender As Object, e As EventArgs) Handles PicBox.Click
Dim prevColor As Color = PicBox.BackColor
ColorDlg = New Colordialog_Realtime
ColorDlg.Color = PicBox.backcolor
ColorDlg.Title = "Please Select a New Color:"
ColorDlg.Location = New Point(Me.Location.X + Me.Width, Me.Location.Y)
If ColorDlg.ShowDialog() = Windows.Forms.DialogResult.OK Then
PicBox.BackColor = ColorDlg.Color
Else
PicBox.BackColor = prevColor
End If
ColorDlg = Nothing
End Sub
New Colordialog_Realtime Class:
Public Class Colordialog_Realtime
Inherits ColorDialog
Public Event CurrentColor(ByVal c As Color)
Private Const GA_ROOT As Integer = 2
Private Const WM_PAINT As Integer = &HF
Private Const WM_CTLCOLOREDIT As Integer = &H133
Public Declare Function GetAncestor Lib "user32.dll" _
(ByVal hWnd As IntPtr, ByVal gaFlags As Integer) As IntPtr
Private EditWindows As List(Of ApiWindow) = Nothing
Public Sub New()
Me.FullOpen = True
End Sub
<Runtime.InteropServices.DllImport("user32.dll")> _
Private Shared Function SetWindowText(hWnd As IntPtr, lpString As String) As Boolean
End Function
Private Const SWP_NOSIZE As Integer = &H1
Private Declare Function SetWindowPos Lib "user32" Alias "SetWindowPos" _
(ByVal hwnd As IntPtr, ByVal hWndInsertAfter As Integer, ByVal x As Integer, ByVal y As Integer, ByVal cx As Integer, ByVal cy As Integer, ByVal wFlags As Integer) As Integer
Private m_title As String = String.Empty
Private titleSet As Boolean = False
Public Property Title() As String
Get
Return m_title
End Get
Set(value As String)
If value IsNot Nothing AndAlso value <> m_title Then
m_title = value
titleSet = False
End If
End Set
End Property
Private m_location As Point = Point.Empty
Private locationSet As Boolean = False
Public Property Location() As Point
Get
Return m_location
End Get
Set(value As Point)
If Not value.Equals(Point.Empty) AndAlso Not value.Equals(m_location) Then
m_location = value
locationSet = False
End If
End Set
End Property
<System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
Protected Overrides Function HookProc(ByVal hWnd As IntPtr, ByVal msg As Integer, ByVal wParam As IntPtr, ByVal lParam As IntPtr) As IntPtr
Select Case msg
Case WM_PAINT
If Not titleSet AndAlso Title <> String.Empty Then
SetWindowText(GetAncestor(hWnd, GA_ROOT), Title)
titleSet = True
End If
If Not locationSet AndAlso Not m_location.Equals(Point.Empty) Then
SetWindowPos(GetAncestor(hWnd, GA_ROOT), 0, m_location.X, m_location.Y, 0, 0, SWP_NOSIZE)
locationSet = True
End If
Case WM_CTLCOLOREDIT
If IsNothing(EditWindows) Then
Dim mainWindow As IntPtr = GetAncestor(hWnd, GA_ROOT)
If Not mainWindow.Equals(IntPtr.Zero) Then
EditWindows = New List(Of ApiWindow)((New WindowsEnumerator).GetChildWindows(mainWindow, "Edit"))
End If
End If
If Not IsNothing(EditWindows) AndAlso EditWindows.Count = 6 Then
Dim strRed As String = WindowsEnumerator.WindowText(EditWindows(3).hWnd)
Dim strGreen As String = WindowsEnumerator.WindowText(EditWindows(4).hWnd)
Dim strBlue As String = WindowsEnumerator.WindowText(EditWindows(5).hWnd)
Dim Red, Green, Blue As Integer
If Integer.TryParse(strRed, Red) Then
If Integer.TryParse(strGreen, Green) Then
If Integer.TryParse(strBlue, Blue) Then
RaiseEvent CurrentColor(Color.FromArgb(Red, Green, Blue))
End If
End If
End If
End If
End Select
Return MyBase.HookProc(hWnd, msg, wParam, lParam)
End Function
End Class