I want to implement intellisense-like feature for my multiline textbox. The intellisense control is placed in standard form without control box (so, no title or maximize/minimze bottons are visible).
All works fine, but if intellisense-form is shown and user clicks into the intellisense form, the main form lost focus (so, user must click back into textbox for writing).
I know ShowWithoutActivation property, but it works only on activation, not on "standard focus".
EDIT:
I found the help on http://www.daniweb.com/software-development/csharp/threads/273724 , but the presented code does not work. It throws "Invalid parameter" exception during "Show()" method.
To show the form without activation, override the ShowWithoutActivation property
protected override bool ShowWithoutActivation
{
get { return true; }
}
And if you do not want to activate the form even on mouse clicks, override the CreateParams and set these styles
protected override CreateParams CreateParams
{
get
{
CreateParams p = base.CreateParams;
p.Style |= 0x40000000; // WS_CHILD
p.ExStyle |= 0x8000000; // WS_EX_NOACTIVATE - requires Win 2000 or higher :)
return p;
}
}
i have a code somedays i downloaded from code project (i think ) and i dont what is the original download link try using this
using System;
using System.Drawing;
using System.Windows.Forms;
namespace Balloon.NET
{
public class BalloonWindow : Form
{
public static readonly int TIPMARGIN;
public static readonly int TIPTAIL;
public BalloonWindow();
public Point AnchorPoint { get; set; }
public BalloonWindow.BallonQuadrant Quadrant { get; }
public static Point AnchorPointFromControl(Control anchorControl);
protected override void Dispose(bool disposing);
protected override void OnLoad(EventArgs e);
protected virtual Rectangle OnNCCalcSize(Rectangle windowRect);
protected virtual void OnNCPaint(Graphics g);
protected override void OnResize(EventArgs e);
protected void RecalcLayout();
protected void RepositionWindow(Point oldAnchorPoint, Point newAnchorPoint);
public void ShowBalloon(Control anchorControl);
protected override void WndProc(ref Message m);
public enum BallonQuadrant
{
TopLeft = 0,
TopRight = 1,
BottomLeft = 2,
BottomRight = 3,
}
}
}
and use this form as follow
Balloon.NET.BalloonWindow ms = new Balloon.NET.BalloonWindow();
private void numberEdit1_TextChanged(object sender, EventArgs e)
{
if (!ms.Visible)
{
ms.ShowBalloon(numberEdit1);
numberEdit1.Focus();
}
}
Related
I have 3 buttons on one usercontrol (usercontrol1.xaml) in the Window . Now on-click of button 1 ,I want to switch the view to another usercontrol (usercontrol2.xaml), which again have 3 buttons and so on.
How to implement in MVVM Pattern in WPF?
Be aware that im using caliburn micro for this example
private IEventAggregator _eventAggregator => IoC.Get<IEventAggregator>(key: nameof(EventAggregator));
private IWindowManager _windowManager => IoC.Get<IWindowManager>(key: nameof(WindowManager));
public ShellViewModel(IEventAggregator eventAggregator)
{
_eventAggregator.Subscribe(this);
}
public string _firstName;
// public ShellViewModel page = new ShellViewModel();
public string FirstName
{
get {
return _firstName;
}
set
{
_firstName = value;
NotifyOfPropertyChange(() => FirstName);
}
}
public ICommand ConvertTextCommand
{
get { return new DelegateCommand(ConvertText); }
}
void ConvertText()
{
//string url = "https://www.google.com/";
string url = FirstName;
string result;
using (HttpClient client = new HttpClient())
{
using (HttpResponseMessage response = client.GetAsync(url).Result)
{
using (HttpContent content = response.Content)
{
result = content.ReadAsStringAsync().Result;
}
}
}
//(MainWindow)Application.Current.MainWindow).txtForm1TextBox.Text = "Some text";
//Application.Current.Resources.Add("PageSource", result);
// NavigationService.NavigateToViewModel<SecondViewModel>("Hello");
_windowManager.ShowWindow(new PageSourceViewModel(_eventAggregator), null);
_eventAggregator.PublishOnUIThread(result);
}
You can check caliburn micro and see that you can just create a new view model in a window manager instance
here is also 2 links to 2 tutorials that helped me solve this issue for MVVM
https://www.youtube.com/watch?v=laPFq3Fhs8k
https://www.youtube.com/watch?v=9kGcE9thwNw&list=LLy8ROdSzpPJnikdZQ1XPZkQ&index=30&t=0s
the first tutorial will help you to get a general idea. The second will help you with events and you can look back to my code and see how i handled a new window instance.
You can also call the same view model for a new instance of the same window like you said in the question
You will also need to make a boostrapper class. For my example i did it like this.
public class Bootstrapper : BootstrapperBase
{
private readonly SimpleContainer _container =
new SimpleContainer();
public Bootstrapper()
{
Initialize();
}
protected override void Configure()
{
_container.Instance<IWindowManager>(new WindowManager());
_container.Singleton<IEventAggregator, EventAggregator>();
_container.PerRequest<ShellViewModel>();
}
protected override void OnStartup(object sender, StartupEventArgs e)
{
_container.Instance<SimpleContainer>(_container);
_container.Singleton<IWindowManager, WindowManager>(key: nameof(WindowManager))
.Singleton<IEventAggregator, EventAggregator>(key: nameof(EventAggregator));
DisplayRootViewFor<ShellViewModel>();
}
protected override object GetInstance(Type service, string key)
{
return _container.GetInstance(service, key);
}
protected override IEnumerable<object> GetAllInstances(Type service)
{
return _container.GetAllInstances(service);
}
protected override void BuildUp(object instance)
{
_container.BuildUp(instance);
}
}
I am trying to define some event handlers inside auser class but im not sure how. The MainWindow needs the handler definitions.
public abstract partial class MainWindow: Window {
public User user = new User();
}
public class User {
internal void ExampleMouseEventDown(object sender, MouseEventArgs e) {
// Does stuff;
}
}
Isnt there a way to somehow make this work? Such as:
mainWindow.AddHandleDefinition += ExampleMouseEventDown();
Also tried this:
public partial class MainWindow : Window {
public MainWindow() {
User user = new User(this);
}
}
public class User
{
internal User(MainWindow w)
{
w.AddObserverButton.MouseUp += ExampleMouseEventDown;
}
internal void ExampleMouseEventDown(object sender, MouseEventArgs e)
{
// Does stuff;
}
}
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);
}
It so happened that the application I'm working on doesn't operate on documents, so there's no need in displaying the recently opened documents list in the application menu.
But - annoyingly - there are no properties readily available in the RibbonApplicationMenu class to hide the unused AuxiliaryPane (for which, curiously, the property does exist, but is marked as "internal").
Of course, I can just leave it there - but that's... untidy.
So, here's the solution I came up with.
Hope it will be helpful for anyone else :-)
The general idea is to subclass the RibbonApplicationMenu, find the template child corresponding to the menu's Popup, and overrule its Width (after a number of frustrating experiments it became evident that doing that neither for PART_AuxiliaryPaneContentPresenter nor for PART_FooterPaneContentPresenter - nor for the both - could achieve anything).
Well, without further ado, here's the code:
public class SlimRibbonApplicationMenu : RibbonApplicationMenu
{
private const double DefaultPopupWidth = 180;
public double PopupWidth
{
get { return (double)GetValue(PopupWidthProperty); }
set { SetValue(PopupWidthProperty, value); }
}
public static readonly DependencyProperty PopupWidthProperty =
DependencyProperty.Register("PopupWidth", typeof(double),
typeof(SlimRibbonApplicationMenu), new UIPropertyMetadata(DefaultPopupWidth));
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
this.DropDownOpened +=
new System.EventHandler(SlimRibbonApplicationMenu_DropDownOpened);
}
void SlimRibbonApplicationMenu_DropDownOpened(object sender, System.EventArgs e)
{
DependencyObject popupObj = base.GetTemplateChild("PART_Popup");
Popup popupPanel = (Popup)popupObj;
popupPanel.Width = (double)GetValue(PopupWidthProperty);
}
}
As a side note, I tried to find any way to resolve the desired width based on the max width of the ApplicationMenu's Items (rather than setting it explicitly through the DependencyProperty in XAML) - but to no avail.
Given my despise to "magic numbers", any suggestion on that will be deeply appreciated.
I know this has been a while, but I've got another solution to this. This one does not provide the Popup width property, instead a ShowAuxilaryPanel boolean. It then goes to Bind the width of the Popup, to the width of the menu item area of the menu.
public class SlimRibbonApplicationMenu : RibbonApplicationMenu
{
public bool ShowAuxilaryPanel
{
get { return (bool)GetValue(ShowAuxilaryPanelProperty); }
set { SetValue(ShowAuxilaryPanelProperty, value); }
}
public static readonly DependencyProperty ShowAuxilaryPanelProperty =
DependencyProperty.Register("ShowAuxilaryPanel", typeof(bool),
typeof(SlimRibbonApplicationMenu), new UIPropertyMetadata(true));
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
this.DropDownOpened += SlimRibbonApplicationMenu_DropDownOpened;
}
void SlimRibbonApplicationMenu_DropDownOpened(object sender, EventArgs e)
{
DependencyObject popupObj = base.GetTemplateChild("PART_Popup");
Popup panel = (Popup)popupObj;
var exp = panel.GetBindingExpression(Popup.WidthProperty);
if (!this.ShowAuxilaryPanel && exp == null)
{
DependencyObject panelArea = base.GetTemplateChild("PART_SubMenuScrollViewer");
var panelBinding = new Binding("ActualWidth")
{
Source = panelArea,
Mode = BindingMode.OneWay
};
panel.SetBinding(Popup.WidthProperty, panelBinding);
}
else if (this.ShowAuxilaryPanel && exp != null)
{
BindingOperations.ClearBinding(panel, Popup.WidthProperty);
}
}
}
worked for me
<telerik:ApplicationMenu RightPaneVisibility="Collapsed" >
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;
}
}