问题描述
我想要做的就是同时ColorDialog类打开后,即可在全开放模式的ColorDialog类的时间选择的颜色。
例如在这个图片我有一个白色的图片框和一个ColorDialog类是打开了红颜色的选择,我要的是改变PictureBox的背景色为所选择的颜色(红色),而pressing的确定按钮确认ColorDialog类,并得到了色彩效果...
这是可能做到的默认ColorDialog类?
这是我已经试过:
公共类Form1中
昏暗WithEvents就PicBox作为新的PictureBox
昏暗ColorDlg作为新ColorDialog类
私人小组Form1_Load的(发送者为对象,E作为EventArgs的)把手MyBase.Load
PicBox.BackColor = Color.Blue
ColorDlg.FullOpen = TRUE
Me.Controls.Add(PicBox)
结束小组
私人小组PicBox_Click(发送者为对象,E作为EventArgs的)把手PicBox.Click
ColorDlg.Color = sender.backcolor
虽然没有ColorDlg.ShowDialog()= Windows.Forms.DialogResult.OK
sender.BackColor = ColorDlg.Color
结束在
sender.BackColor = ColorDlg.Color
结束小组
末级
免责声明:正因为我们可以,并不意味着我们应该
这个例子是专门与 ColorDialog类
在 FullOpen
模式下工作。它依赖于一个事实,即红色,绿色和蓝色:修改
实时更新的对话框中控件的颜色改变由用户,和一个事实,即 WM_CTLCOLOREDIT
终止那些控制是每次更新时(这也适用于当这些值被手动键入)发送。我们必须创建一个新的实例 MyColorDialog
我们要使用它,使窗口处理这些控件是正确的每一次。
在 WindowsEnumerator
类下面是根据Bob的(TheLearnedOne)工作的这里。
*我是 Idle_Mind
过在专家交换为好。
这是在VS2010 premium测试上的Win8专业版。我不,如果需要在其他版本的Windows进行了ColorDialog类的任何变化:
公共类Form1中
私人WithEvents就PicBox作为新的PictureBox
私人WithEvents就ColorDlg作为MyColorDialog =无
私人小组Form1_Load的(发送者为对象,E作为EventArgs的)把手MyBase.Load
PicBox.BackColor = Color.Blue
Me.Controls.Add(PicBox)
结束小组
私人小组PicBox_Click(发送者为对象,E作为EventArgs的)把手PicBox.Click
ColorDlg =新MyColorDialog
ColorDlg.Color = sender.backcolor
如果ColorDlg.ShowDialog()= Windows.Forms.DialogResult.OK然后
sender.BackColor = ColorDlg.Color
结束如果
ColorDlg =无
结束小组
私人小组ColorDlg_CurrentColor(c以的System.Drawing.Color)处理ColorDlg.CurrentColor
PicBox.BackColor = C
结束小组
末级
公共类MyColorDialog
继承ColorDialog类
公共事件CurrentColor(BYVAL c以彩色)
私人常量GA_ROOT作为整数= 2
私人常量WM_CTLCOLOREDIT作为整数=安培; H133
公开声明函数GetAncestor库user32.dll中_
(BYVAL的HWND作为IntPtr的,BYVAL gaFlags为整数)作为IntPtr的
私人EditWindows方式列表(中ApiWindow)=无
公共子新()
Me.FullOpen = TRUE
结束小组
<System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand,名称:=FullTrust的)&GT; _
受保护的覆盖功能HOOKPROC(BYVAL的HWND作为IntPtr的,BYVAL味精作为整数,BYVAL wParam中的IntPtr,BYVAL lParam中的IntPtr)作为IntPtr的
选择案例味精
案例WM_CTLCOLOREDIT
如果IsNothing(EditWindows)然后
昏暗的主窗口作为IntPtr的= GetAncestor(HWND,GA_ROOT)
如果不mainWindow.Equals(IntPtr.Zero)然后
EditWindows =新名单(中ApiWindow)((新WindowsEnumerator).GetChildWindows(的主窗口,编辑))
结束如果
结束如果
如果不IsNothing(EditWindows)AndAlso EditWindows.Count = 6于是,
DIM strRed的String = WindowsEnumerator.WindowText(EditWindows(3).hWnd)
昏暗strGreen作为字符串= WindowsEnumerator.WindowText(EditWindows(4).hWnd)
昏暗strBlue作为字符串= WindowsEnumerator.WindowText(EditWindows(5).hWnd)
暗淡的红,绿,蓝作为整数
如果Integer.TryParse(strRed,红)。然后
如果Integer.TryParse(strGreen,绿),然后
如果Integer.TryParse(strBlue,蓝)然后
的RaiseEvent CurrentColor(Color.FromArgb(红,绿,蓝))
结束如果
结束如果
结束如果
结束如果
最终选择
返回MyBase.HookProc(HWND,味精,的wParam,lParam的)
端功能
末级
公共类ApiWindow
公众的hWnd作为IntPtr的
公共类名作为字符串
公共MainWindowTitle作为字符串
末级
公共类WindowsEnumerator
私人委托函数EnumCallBackDelegate(BYVAL HWND作为IntPtr的,BYVAL lParam的作为整数)作为整数
私人声明函数EnumWindows的库USER32_
(BYVAL lpEnumFunc作为EnumCallBackDelegate,BYVAL lParam的作为整数)作为整数
私人声明函数EnumChildWindows库USER32_
(BYVAL hWndParent作为IntPtr的,BYVAL lpEnumFunc作为EnumCallBackDelegate,BYVAL lParam的作为整数)作为整数
私人声明函数GetClassName库USER32别名GetClassNameA_
(BYVAL HWND作为IntPtr的,BYVAL lpClassName作为System.Text.StringBuilder,BYVAL nMaxCount为整数)作为整数
私人声明函数IsWindowVisible库USER32(BYVAL HWND作为IntPtr的)作为整数
私人声明函数的getParent库USER32(BYVAL HWND作为IntPtr的)作为整数
私人声明SendMessage函数库USER32别名SendMessageA_
(BYVAL HWND作为IntPtr的,BYVAL WMSG作为整数,wParam参数BYVAL作为整数,BYVAL lParam的作为整数)作为整数
私人声明SendMessage函数库USER32别名SendMessageA_
(BYVAL HWND作为IntPtr的,BYVAL WMSG作为整数,wParam参数BYVAL作为整数,BYVAL lParam中System.Text.StringBuilder)作为整数
私人_listChildren作为新的列表(ApiWindow中)
私人_listTopLevel作为新的列表(ApiWindow中)
私人_topLevelClass作为字符串=的String.Empty
私人_childClass作为字符串=的String.Empty
公共重载函数GetTopLevelWindows()作为ApiWindow()
EnumWindows的(AddressOf EnumWindowProc,和放大器; H0)
返回_listTopLevel.ToArray
端功能
公共重载函数GetTopLevelWindows(BYVAL类名作为字符串)作为ApiWindow()
_topLevelClass =的className
返回Me.GetTopLevelWindows()
端功能
公共重载函数GetChildWindows(BYVAL HWND作为的Int32)作为ApiWindow()
_listChildren.Clear()
EnumChildWindows(HWND,AddressOf EnumChildWindowProc,和放大器; H0)
返回_listChildren.ToArray
端功能
公共重载函数GetChildWindows(BYVAL HWND作为的Int32,BYVAL childClass作为字符串)作为ApiWindow()
_childClass = childClass
返回Me.GetChildWindows(HWND)
端功能
专用功能EnumWindowProc(BYVAL HWND作为的Int32,BYVAL lParam中的Int32)作为的Int32
如果的getParent(HWND)= 0 AndAlso IsWindowVisible(HWND)然后
昏暗的窗口ApiWindow = GetWindowIdentification(HWND)
如果_topLevelClass.Length = 0 OrElse运算window.ClassName.ToLower()= _topLevelClass.ToLower(),然后
_listTopLevel.Add(窗口)
结束如果
结束如果
返回1
端功能
专用功能EnumChildWindowProc(BYVAL HWND作为的Int32,BYVAL lParam中的Int32)作为的Int32
昏暗的窗口ApiWindow = GetWindowIdentification(HWND)
如果_childClass.Length = 0 OrElse运算window.ClassName.ToLower()= _childClass.ToLower(),然后
_listChildren.Add(窗口)
结束如果
返回1
端功能
专用功能GetWindowIdentification(BYVAL HWND为整数)作为ApiWindow
昏暗classBuilder作为新System.Text.StringBuilder(64)
GetClassName(HWND,classBuilder,64)
昏暗的窗口作为新ApiWindow
window.ClassName = classBuilder.ToString()
window.MainWindowTitle = WindowText(HWND)
window.hWnd = HWND
返回窗口
端功能
公共共享功能WindowText(BYVAL HWND作为IntPtr的)作为字符串
常量W_GETTEXT作为整数=安培;高清
常量W_GETTEXTLENGTH作为整数=安培;何
昏暗的SB作为新System.Text.StringBuilder
昏暗的长度为整数= SendMessage消息(HWND,W_GETTEXTLENGTH,0,0)
如果长度GT; 0然后
SB =新System.Text.StringBuilder(长度+ 1)的
SendMessage消息(HWND,W_GETTEXT,SB.Capacity,SB)
结束如果
返回SB.ToString
端功能
末级
What I want to do is while a ColorDialog is opened, get the temporal selected color in the "full open" mode of the Colordialog.
For example in this image I have a white colored picturebox and a ColorDialog is opened with the "Red" color selected, what I want is to change the picturebox backcolor to the selected color (Red) without pressing the "ok" button to confirm the ColorDialog and to get the Color result...
This is possibly to do with the default ColorDialog?
This is what I've tried:
Public Class Form1
Dim WithEvents PicBox As New PictureBox
Dim ColorDlg As New ColorDialog
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
PicBox.BackColor = Color.Blue
ColorDlg.FullOpen = True
Me.Controls.Add(PicBox)
End Sub
Private Sub PicBox_Click(sender As Object, e As EventArgs) Handles PicBox.Click
ColorDlg.Color = sender.backcolor
While Not ColorDlg.ShowDialog() = Windows.Forms.DialogResult.OK
sender.BackColor = ColorDlg.Color
End While
' sender.BackColor = ColorDlg.Color
End Sub
End Class
Disclaimer: Just because we can, doesn't mean we should!
This example is specifically designed to work with the ColorDialog
in the FullOpen
mode. It relies on the fact that the "Red:", "Green:" and "Blue:" Edit
controls in the dialog are updated in real-time as the color is changed by the user, and the fact that a WM_CTLCOLOREDIT
is sent each time those controls are updated (this also applies to when those values are manually typed in). We have to create a new instance of MyColorDialog
each time we want to use it so that the window handles to those controls are correct.
The WindowsEnumerator
class below is based on Bob's (TheLearnedOne) work here.
*I'm Idle_Mind
over at Experts-Exchange as well.
This was tested on Win8 Pro in VS2010 Premium. I don't if any changes would need to be made for the ColorDialog in other versions of Windows:
Public Class Form1
Private WithEvents PicBox As New PictureBox
Private WithEvents ColorDlg As MyColorDialog = Nothing
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
PicBox.BackColor = Color.Blue
Me.Controls.Add(PicBox)
End Sub
Private Sub PicBox_Click(sender As Object, e As EventArgs) Handles PicBox.Click
ColorDlg = New MyColorDialog
ColorDlg.Color = sender.backcolor
If ColorDlg.ShowDialog() = Windows.Forms.DialogResult.OK Then
sender.BackColor = ColorDlg.Color
End If
ColorDlg = Nothing
End Sub
Private Sub ColorDlg_CurrentColor(c As System.Drawing.Color) Handles ColorDlg.CurrentColor
PicBox.BackColor = c
End Sub
End Class
Public Class MyColorDialog
Inherits ColorDialog
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
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
Public Class ApiWindow
Public hWnd As IntPtr
Public ClassName As String
Public MainWindowTitle As String
End Class
Public 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
这篇关于获得色彩的特性,同时ColorDialog类仍处于打开状态,确认对话框之前?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!