Im'm using winform DevExpress library.
Now need to create a control, basing on PopupContainerEdit but this control must have some behaviors like when it's focused, the popup opens and when lost focus the popup closes.
This is the code I'm using but the popup dessapears after getting focus.
public class HelpEdit : PopupContainerEdit {
private PopupContainerControl _container;
private GridControl _gridControl;
private GridView _gridView;
[DefaultValue("")]
[DXCategory("Data")]
[AttributeProvider(typeof(IListSource))]
public object Datasource {
get { return _gridControl.DataSource; }
set { _gridControl.DataSource = value; }
}
public HelpEdit() : base() {
_container = new PopupContainerControl();
this.Properties.TextEditStyle = DevExpress.XtraEditors.Controls.TextEditStyles.Standard;
this._gridControl = new GridControl();
this._gridControl.Dock = DockStyle.Fill;
this._gridView = new GridView(_gridControl);
_container.Controls.Add(_gridControl);
_container.Size = new Size(this.Width, 250);
this.Properties.PopupControl = _container;
this.Properties.PopupControl.Size = new Size(this.Width, 250);
}
protected override void OnGotFocus(EventArgs e) {
base.OnGotFocus(e);
this.ShowPopup();
}
protected override void OnLostFocus(EventArgs e) {
base.OnLostFocus(e);
this.ClosePopup();
}
}
Your popup disappears because it closes by your code as soon as the popup container control(_container) got focus itself. You should not close popup within the OnLostFocus() override because the base.OnLostFocus method of PopupContainerEdit is already contains correct code for closing popup. Or close popup conditionally, using the following code:
protected override void OnLostFocus(EventArgs e) {
if(IsPopupOpen && !EditorContainsFocus)
ClosePopup(PopupCloseMode.Immediate);
base.OnLostFocus(e);
}
Related
I have an WPF User control in which I create a RoutedEventHandler. I want to raise an event notifying every time its height changes:
Wpfusercontrol.designer.cs:
public partial class Wpfusercontrol: System.Windows.Controls.UserControl
{
public static readonly RoutedEvent HeightChangedEvent = EventManager.RegisterRoutedEvent(
"HeightChanged", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(Wpfusercontrol));
public event RoutedEventHandler HeightChanged
{
add { AddHandler(HeightChangedEvent, value); }
remove { RemoveHandler(HeightChangedEvent, value); }
}
private void UserControl_SizeChanged(object sender, SizeChangedEventArgs e)
{
if (e.HeightChanged && HeightChangedEvent != null)
{
RaiseEvent(new RoutedEventArgs(HeightChangedEvent));
}
}
}
Then this WPF user control is hosted in an ElementHost
WindowsFormsHostControl.Designer.cs:
partial class WindowsFormsHostControl
{
private void InitializeComponent()
{
this.ElementHostFormControl = new System.Windows.Forms.Integration.ElementHost();
this.Wpfusercontrol= new Wpfusercontrol();
this.SuspendLayout();
//
// ElementHostFormControl
//
this.ElementHostFormControl.Dock = System.Windows.Forms.DockStyle.Fill;
this.ElementHostFormControl.Location = new System.Drawing.Point(0, 0);
this.ElementHostFormControl.Margin = new System.Windows.Forms.Padding(2);
this.ElementHostFormControl.Name = "ElementHostFormControl";
this.ElementHostFormControl.Size = new System.Drawing.Size(75, 78);
this.ElementHostFormControl.TabIndex = 0;
this.ElementHostFormControl.Child = this.Wpfusercontrol;
//
// WindowsFormsHostControl
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.Controls.Add(this.ElementHostFormControl);
this.Margin = new System.Windows.Forms.Padding(2);
this.Name = "WindowsFormsHostControl";
this.Size = new System.Drawing.Size(75, 78);
this.ResumeLayout(false);
}
private System.Windows.Forms.Integration.ElementHost ElementHostFormControl;
private Wpfusercontrol Wpfusercontrol;
}
WindowsFormsHostControl.cs:
public partial class WindowsFormsHostControl: System.Windows.Forms.UserControl
{
private RoutedEventHandler heightChangedEventHandler;
public WindowsFormsHostControl()
{
InitializeComponent();
}
public WindowsFormsHostControl(RoutedEventHandler heightChangedEventHandler) : this()
{
this.heightChangedEventHandler = heightChangedEventHandler;
this.Wpfusercontrol.HeightChanged += this.heightChangedEventHandler;
}
public void SubscribeHeightChanged()
{
this.Wpfusercontrol.HeightChanged += this.heightChangedEventHandler;
}
public void UnsubscribeHeightChanged()
{
this.Wpfusercontrol.HeightChanged -= this.heightChangedEventHandler;
}
}
This WindowsFormsHostControl is embedded within an UI object called custom task pane which is kind of UI container for VSTO Outlook Add-ins. This custom task pane has a button to resize its height but it does not provide an event to catch it. So when you resize the height of that custom task pane, the height of the wpf user control changes as well, so through the routed event in the wpf user control I know when the custom task pane is resized and I catch the event.
Now from one class in my VSTO Outlook Add-in application (which in fact is a winforms app), I perform below things:
private WindowsFormsHostControl windowsFormsHostControl = null;
this.windowsFormsHostControl = new WindowsFormsHostControl(this.WpfUserControl_HeightChanged);
System.Windows.Fomrs.Timer t;
private void WpfUserControl_HeightChanged(object sender, System.Windows.RoutedEventArgs e)
{
// Dome some stuff
...
t = new System.Windows.Fomrs.Timer();
t.Tick += new EventHandler(Update);
t.Interval = 100;
t.Enable = true;
}
private void Update(object sender, EventArgs e)
{
// Some more stuf....
....
// In below lines I update the height of the custom task pane (VSTO Outlook UI object) which in turn causes the WPF user control to resize its height as well. So then, I am trying to unsubscribe from the wpf routed event, then update the height for custom task pane, and finally subscribe again to the wpf routed event. I do this to prevent routed event in wpf user control fires again.
this.windowsFormsHostControl.UnsubscribeHeightChanged();
// here I update the height for custom task pane
this.windowsFormsHostControl.SubscribeHeightChanged();
}
The problem is that it looks like the line:
this.windowsFormsHostControl.UnsubscribeHeightChanged();
is not working because the routed event in the wpf user control continues raising each time I execute the line of code between UnsubscribeHeightChanged and SubscribeHeightChanged.
So what am i doing wrong?
I have an array of pictureboxes named from B11 (co-ords 1,1) to B55 (co-ords 5,5). I would like to hide these all on startup (and in the middle of running). I was thinking of making an array of the names manually but would it be the best solution?
If they all have a common parent control, such as a panel or groupbox (or even the form):
Parent.SuspendLayout()
For Each pbox As PictureBox in Parent.Controls.OfType(Of PictureBox)()
pbox.Visible = False
Next pbox
Parent.ResumeLayout()
The Suspend/Resume-Layout() is to avoid flickering as you modify a bunch of controls at once.
You could extend the PictureBox class and use event handling to accomplish this by:
Adding a public property to the form to tell if the picture boxes should be shown or hidden.
Adding an event to the form that is raised when the show/hide picture box property is changed.
Extending the PictureBox class so that it subscribes to the event of the parent form.
Setting the visible property of the extended PictureBox class to the show/hide property of the parent form.
When the show/hide flag is changed on the parent form all of the picture boxes will change their visibility property accordingly.
Form Code:
public partial class PictureBoxForm : Form {
public PictureBoxForm() {
InitializeComponent();
this.pictureBoxesAdd();
}
private void pictureBoxesAdd() {
MyPictureBox mp1 = new MyPictureBox();
mp1.Location = new Point(1, 1);
MyPictureBox mp2 = new MyPictureBox();
mp2.Location = new Point(200, 1);
this.Controls.Add(mp1);
this.Controls.Add(mp2);
}
public event EventHandler PictureBoxShowFlagChanged;
public bool PictureBoxShowFlag {
get { return this.pictureBoxShowFlag; }
set {
if (this.pictureBoxShowFlag != value) {
pictureBoxShowFlag = value;
if (this.PictureBoxShowFlagChanged != null) {
this.PictureBoxShowFlagChanged(this, new EventArgs());
}
}
}
}
private bool pictureBoxShowFlag = true;
private void cmdFlip_Click( object sender, EventArgs e ) {
this.PictureBoxShowFlag = !this.PictureBoxShowFlag;
}
}
Extended PictureBox Code:
public class MyPictureBox : PictureBox {
public MyPictureBox() : base() {
this.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.ParentChanged += new EventHandler(MyPictureBox_ParentChanged);
}
private void MyPictureBox_ParentChanged( object sender, EventArgs e ) {
try {
PictureBoxForm pbf = (PictureBoxForm)this.Parent;
this.Visible = pbf.PictureBoxShowFlag;
pbf.PictureBoxShowFlagChanged += new
EventHandler(pbf_PictureBoxShowFlagChanged);
} catch { }
}
private void pbf_PictureBoxShowFlagChanged( object sender, EventArgs e ) {
PictureBoxForm pbf = (PictureBoxForm)sender;
this.Visible = pbf.PictureBoxShowFlag;
}
}
...or just put 'em all on a Panel, and change the panel's visibility.
I have a user interface like Prism StockTrader RI application with some changes whrere
i put control panel in ResearchRegion contains list of items when i select one item
its details are displayed in the AnimatedTabControl in the main region.
I need to customize the AnimatedTabControl (from StockTrader RI) like this:
The AnimatedTabControl show tab header like normal tab control where header
will contain the selected item name
When new selection is applied from a control panel that resides in the ResearchRegion a
new tab open w/o removing the previous tab selection and w/o animation
Tab header contain close button to close any of the open tabs when required
Animation take place only when changing the control panel in the ResearchRegion
public class AnimatedTabControl : TabControl
{
public static readonly RoutedEvent SelectionChangingEvent = EventManager.RegisterRoutedEvent(
"SelectionChanging", RoutingStrategy.Direct, typeof(RoutedEventHandler), typeof (AnimatedTabControl));
private DispatcherTimer timer;
public AnimatedTabControl()
{
DefaultStyleKey = typeof(AnimatedTabControl);
}
public event RoutedEventHandler SelectionChanging
{
add { AddHandler(SelectionChangingEvent, value); }
remove { RemoveHandler(SelectionChangingEvent, value); }
}
protected override void OnSelectionChanged(SelectionChangedEventArgs e)
{
this.Dispatcher.BeginInvoke(
(Action)delegate
{
this.RaiseSelectionChangingEvent();
this.StopTimer();
this.timer = new DispatcherTimer { Interval = new TimeSpan(0, 0, 0, 0, 500) };
EventHandler handler = null;
handler = (sender, args) =>
{
this.StopTimer();
base.OnSelectionChanged(e);
};
this.timer.Tick += handler;
this.timer.Start();
});
}
// This method raises the Tap event
private void RaiseSelectionChangingEvent()
{
var args = new RoutedEventArgs(SelectionChangingEvent);
RaiseEvent(args);
}
private void StopTimer()
{
if (this.timer != null)
{
this.timer.Stop();
this.timer = null;
}
}
}
Thanks in Advance
I have answered part#3 of your question(Tab header contain close button to close any of the open tabs when required).
Have a look at my public folder in SkyDrive Account:-
(https://skydrive.live.com/redir?resid=656548C49A72B6CD!105)
I am following this exactly:
http://msdn.microsoft.com/en-us/library/ms185301.aspx
but can't get it to work. The form appears when I try and add my new item, but when I input text and click the button, nothing happens.
For posterity's sake here is my code:
The non-empty methods in the Wizard class which extends IWizard
public void RunStarted(object automationObject,
Dictionary<string, string> replacementsDictionary,
WizardRunKind runKind, object[] customParams)
{
try
{
// Display a form to the user. The form collects
// input for the custom message.
inputForm = new UserInputForm();
inputForm.ShowDialog();
customMessage = inputForm.get_CustomMessage();
// Add custom parameters.
replacementsDictionary.Add("$custommessage$",
customMessage);
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
// This method is only called for item templates,
// not for project templates.
public bool ShouldAddProjectItem(string filePath)
{
return true;
}
The user input form code:
public partial class UserInputForm : Form
{
private string customMessage;
public UserInputForm()
{
InitializeComponent();
}
public string get_CustomMessage()
{
return customMessage;
}
private void button1_Click(object sender, EventArgs e)
{
customMessage = textBox1.Text;
this.Dispose();
}
}
And the button is indeed named button 1:
this.button1.Location = new System.Drawing.Point(200, 180);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(100, 40);
this.button1.TabIndex = 0;
this.button1.Text = "Click Me";
this.button1.UseVisualStyleBackColor = true;
So I don't have much experience with Windows Forms (do web apps), but I am following the directions on MSDN and it's pretty clear cut. Any suggestions? Can anyone else get this to work?
Okay I figured it out. I had to add the event handler in the form's constructor manually:
public UserInputForm()
{
InitializeComponent();
button1.Click += button1_Click;
}
Why this isn't in the documentation on MSDN boggles my mind.
If you use the WinForms designer mode to drag your button from the Toolbox, and then double-clicked the button in the designer view, it would have added the event handler and stubbed that Click method for you. Just FYI.
I have a simple implementation of a ListView in WPF that allows me to select multiple items in the list by holding the mouse button and dragging over the items. However, while holding the mouse button down, when I move the mouse outside the ListView, something strange happens with the selection. Ideally, I would just want the selection to remain the same, but instead it quickly cycles through all the selected items, leaving only the last item selected.
Here's the code, have any ideas?
public class MultiSelectListView : ListView
{
private bool m_isSelectionActive;
public bool IsSelectionActive
{
get { return m_isSelectionActive; }
}
protected override DependencyObject GetContainerForItemOverride()
{
return new MultiSelectListViewItem(this);
}
protected override void OnPreviewMouseLeftButtonDown(MouseButtonEventArgs e)
{
m_isSelectionActive = true;
}
protected override void OnPreviewMouseLeftButtonUp(MouseButtonEventArgs e)
{
m_isSelectionActive = false;
}
}
public class MultiSelectListViewItem : ListViewItem
{
private readonly MultiSelectListView m_parent;
public MultiSelectListViewItem(MultiSelectListView parent)
{
m_parent = parent;
}
protected override void OnMouseEnter(System.Windows.Input.MouseEventArgs e)
{
if (m_parent.IsSelectionActive)
IsSelected = true;
}
}
The funkiness you are experiencing happens when the mouse "drag" goes above the top of the list or below the bottom of the list. I think the behavior you set up will only work well if the selection mode is Multiple. The modifications to the MultiSelectListView below set the default selection mode to Multiple and assumes the user wants to start another selection with a left mouse click. You will still experience funkiness if the SelectionMode is set to Extended or Single in the XAML.
public class MultiSelectListView : ListView
{
private bool m_isSelectionActive;
public bool IsSelectionActive
{
get
{
return m_isSelectionActive;
}
}
protected override DependencyObject GetContainerForItemOverride()
{
return new MultiSelectListViewItem(this);
}
protected override void OnPreviewMouseLeftButtonDown(MouseButtonEventArgs e)
{
if (SelectionMode != SelectionMode.Single)
{
SelectedItems.Clear();
}
m_isSelectionActive = true;
}
protected override void OnPreviewMouseLeftButtonUp(MouseButtonEventArgs e)
{
m_isSelectionActive = false;
}
public MultiSelectListView() : base()
{
SelectionMode = SelectionMode.Multiple;
}
}