I've figured out how to make everything red as soon as the page is finished loading:
private void webBrowser1_LoadCompleted(object sender, NavigationEventArgs e)
{
var doc = (IHTMLDocument2)webBrowser1.Document;
foreach (IHTMLElement elem in doc.all)
{
elem.style.backgroundColor = "#ff0000";
}
}
Now what if I want to make the element only change color when it's clicked? I see that elem has an onclick property, but it's type is dynamic so I don't know what to do with it. The documentation is pretty useless.
You could do it by using the HTMLDocumentClass instead of the IHTMLDocument2 interface:
public partial class Window1 : Window
{
public Window1()
{
InitializeComponent();
}
private void webBrowser1_LoadCompleted(object sender, NavigationEventArgs e)
{
mshtml.HTMLDocumentClass doc = (mshtml.HTMLDocumentClass)webBrowser1.Document;
doc.HTMLDocumentEvents_Event_onclick += new mshtml.HTMLDocumentEvents_onclickEventHandler(OnClickHandler);
}
bool OnClickHandler()
{
mshtml.HTMLDocumentClass doc = (mshtml.HTMLDocumentClass)webBrowser1.Document;
mshtml.IHTMLWindow2 win = doc.parentWindow;
win.#event.srcElement.style.backgroundColor = "#ff0000";
return false;
}
}
The above solution, has one drawback: the onclick event does not bubble, even though false is returned (i.e. clicking at hyperlinks does not navigate to other pages).
Related
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 am implementing a Webkit Browser control in my windows app.
I need to use a custom context menu (right click) that only has copy/cut/paste as its options regardless of what element is right clicked. I need kind of a step-by-step as to how to implement it
Customizing the context menu for the WebKitBrowser supposes that you get a reference to the WebViewClass and then, setting a IWebUIDelegate for it by calling the setUIDelegate() method.
void MyWebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
var webView = this.GetWebView() as WebKit.Interop.WebViewClass;
webView.setUIDelegate(new MyWebUIDelegate(this));
}
In the IWebUIDelegate implementation you may intercept the contextMenuItemsForElement method and trigger the display of the context menu of the browser.
Here is a working sample:
public partial class Form1 : Form
{
MyWebBrowser webKitBrowser;
public Form1()
{
InitializeComponent();
webKitBrowser = new MyWebBrowser();
webKitBrowser.Dock = DockStyle.Fill;
this.Controls.Add(webKitBrowser);
webKitBrowser.Navigate("http://www.google.com");
}
}
class MyContextMenu : ContextMenu
{
public MyContextMenu()
{
var cutMenuItem = new MenuItem("Cut");
var copyMenuItem = new MenuItem("Copy");
var pasteMenuItem = new MenuItem("Paste");
cutMenuItem.Click += cutMenuItem_Click;
MenuItems.Add(cutMenuItem);
MenuItems.Add(copyMenuItem);
MenuItems.Add(pasteMenuItem);
}
void cutMenuItem_Click(object sender, EventArgs e)
{
//TODO: implement functionality
MessageBox.Show("Cut was selected");
}
}
class MyWebBrowser : WebKitBrowser
{
public event EventHandler ShowContextMenu = new EventHandler(OnFireShowContextMenu);
public MyWebBrowser()
{
DocumentCompleted += MyWebBrowser_DocumentCompleted;
var myContextMenu = new MyContextMenu();
ContextMenu = myContextMenu;
}
void MyWebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
var webView = this.GetWebView() as WebKit.Interop.WebViewClass;
webView.setUIDelegate(new MyWebUIDelegate(this));
}
public static void OnFireShowContextMenu(object sender, EventArgs e)
{
var webBrowser = (Control)sender;
var webView = (WebKit.Interop.WebViewClass)((MyWebBrowser)sender).GetWebView();
var originalPoint = webBrowser.PointToScreen(new Point(0, 0));
var currentPoint = new Point(Cursor.Position.X - originalPoint.X, Cursor.Position.Y - originalPoint.Y);
((WebKitBrowser)sender).ContextMenu.Show((Control)sender, currentPoint);
}
public void FireShowContextMenu()
{
this.ShowContextMenu(this, null);
}
}
class MyWebUIDelegate : IWebUIDelegate
{
private MyWebBrowser owner;
public MyWebUIDelegate(MyWebBrowser browser)
{
this.owner = browser;
}
//trigger the browser's FireShowContextMenu() method
public int contextMenuItemsForElement(WebView sender, CFDictionaryPropertyBag element, int defaultItemsHMenu)
{
owner.FireShowContextMenu();
return defaultItemsHMenu;
}
//return 1, true
public int hasCustomMenuImplementation()
{
return 1;
}
//the rest of the IWebUIDelegate interface implementation
}
For more insight, probably you would want to study some other customizations, such as open-webkit-sharp.
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);
}
I'm new at Silverlight.
I've created a sort of master page using a Page with a frame where the content is loaded. As I handle multiple UserControls at the time (only one is shown, but I want to keep the state of the opened before) I'm setting Content property instead of Navigate method. That way I can assign a UserControl (already created, not a new one as it would be using Navigate with the Uri to the UserControl).
Now I want to take a picture as shown here from the frame when its content changes. If I do it immediately when the content set, the UserControl won't be shown in the picture because it takes a few secs. Frames have the event Navigated, but it doesn't fire with property Content (it just fires when the method Navigate is used, as it name says).
How can I know when new Content is loaded?
If it helps I'm using Silverligh 5.
I've a solution but I don't really like it, so I'm still looking for other ways.
public class CustomFrame : Frame
{
private readonly RoutedEventHandler loadedDelegate;
public static readonly DependencyProperty UseContentInsteadNavigationProperty =
DependencyProperty.Register("UseContentInsteadNavigation", typeof (bool), typeof (CustomFrame), new PropertyMetadata(true));
public bool UseContentInsteadNavigation
{
get { return (bool)GetValue(UseContentInsteadNavigationProperty); }
set { SetValue(UseContentInsteadNavigationProperty, value); }
}
public CustomFrame()
{
this.loadedDelegate = this.uc_Loaded;
}
public new object Content
{
get { return base.Content; }
set
{
if (UseContentInsteadNavigation)
{
FrameworkElement fe = (FrameworkElement)value;
fe.Loaded += loadedDelegate;
base.Content = fe;
}
else
{
base.Content = value;
}
}
}
void uc_Loaded(object sender, RoutedEventArgs e)
{
((UserControl)sender).Loaded -= loadedDelegate;
OnContentLoaded();
}
public delegate void ContentLoadedDelegate(Frame sender, EventArgs e);
public event ContentLoadedDelegate ContentLoaded;
private void OnContentLoaded()
{
if (ContentLoaded != null)
ContentLoaded(this, new EventArgs());
}
}
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.