I am currently trying to create some basic word processor features in a WPF project. I am using a RichTextBox and am aware of all of the EditingCommands (ToggleBold, ToggleItalic...ect.). The thing I am stuck on is allowing the user to change the fontsize and font face like in MS Office where the value changes for only the selected text and if there is no selected text then the value will change for the current caret position. I have come up with a decent amount of code to get this to work, but am having problems with the no selected text thing. Here is what I am doing for the RichTextBox.Selection.
TextSelection text = richTextBox.Selection;
if (text.IsEmpty)
{
//doing this will change the entire word that the current caret position
//is on which is not the desire/expected result.
text.ApplyPropertyValue(RichTextBox.FontSizeProperty, value);
}
else
//This works as expected.
text.ApplyPropertyValue(RichTextBox.FontSizeProperty, value);
So my question is how should I go about doing this? Is there a better/more convenient way to do this? One thought I had was that I would need to insert a new Inline into the Paragraph but I couldn't figure out how to do that. Any help is appreciated. Thank you.
Full disclaimer: This is an exact repost of this question from 7 months ago. I found it while searching for a solution to the exact same problem, however that question wasn't answered and I hope that someone will be able to answer it now nevertheless.
Try this:
private void ChangeTextProperty(DependencyProperty dp, string value)
{
if (mainRTB == null) return;
TextSelection ts = mainRTB.Selection;
if (ts.IsEmpty)
{
TextPointer caretPos = mainRTB.CaretPosition;
TextRange tr = new TextRange(caretPos, caretPos);
tr.Text = " ";
tr.ApplyPropertyValue(dp, value);
}
else
{
ts.ApplyPropertyValue(dp, value);
}
}
I hope it does the trick
You can either explicitly re-set the focus to the RichTextBox by calling its Focus() method after applying the new value to the TextRange, or better yet, make the toolbar items not focusable. for example, if you have a combobox for font sizes:
<ComboBox x:Name="FontSizeSelector" Focusable="False" />
Then you can just use the original code, without the need for calling Focus():
text.ApplyPropertyValue(RichTextBox.FontSizeProperty, value);
OK, just found the answer:
private void ChangeTextProperty(DependencyProperty dp, string value)
{
if (mainRTB == null) return;
TextSelection ts = richTextBox.Selection;
if (ts!=null)
ts.ApplyPropertyValue(dp, value);
richTextBox.Focus();
}
Related
I'm building WPF application that's using the Smith HTML Editor. The application is MVVM and I've got the Smith control bound to a field with HTML content. Everything is working ok, except that the IsDirty implementation that I'm working on gets triggered if you click in or even mouse over the HTML control. I looked a little closer and found that as soon as the control looses focus it changes all my tags to upper case (thus the app sees the field as changed and sets the model to dirty.)
I'm having a hard time putting my hands on any documentation for this control, but so far I haven't been able to find anywhere to control this behaviour.
Here's the XAML for the control:
<smith:HtmlEditor Name="fldcomments" Height="320" BindingContent="{Binding Path=Student.Comments, Mode=TwoWay }"/>
I'd appreciate any hints.
So this is kludgey as hell, but it's the best I came up with. I used NUglify to extract the plain text and added that as a comparison for my field setter function. Here's the code for the function:
protected void SetField<T>(ref T field, T value, string propertyName)
{
if (!EqualityComparer<T>.Default.Equals(field, value))
{
IsDirty = true;
if ((propertyName == "Comments") && (value != null) && (field != null))
{
var ugField = Uglify.HtmlToText((value as string));
var ugValue = Uglify.HtmlToText(field as string);
string strField = Regex.Replace(ugField.Code, #"\s+", string.Empty);
string strValue = Regex.Replace(ugValue.Code, #"\s+", string.Empty);
if (strField == strValue)
{ IsDirty = false; }
}
field = value;
OnPropertyChanged(propertyName);
}
}
I had to add the regex.replace to get rid of some extra whitespace that the HTMLToText function left in there.
I'm not proud, but it works. Still very open to a better solution.
OK, so I am trying to apply the accounting number format for all textboxes on my Form.
Now, I did some research here and found this post that will help me to set the format.
And then I found another post to apply the format for all textbox controls on the form without adding the format code individually to all controls.
Well, the thing is that the code on the format uses the control name, which will bind it to a single textbox control. I tried the control name (TextoBox) instead, and it also failed.
There is another issue to consider, that even if I manage to get past the above problem, the code from format is an event, named after the control name, so I do not think it will work if I apply it to a class or method and call for it.
While I already do have the solution to what I want, I would like to know if there is a faster way to apply it, which will not add so much lines to my code. Trying to learn how to keep things easier to read, doing less with more. Any advise?
Thanks for reading.
It sounds like you have all the pieces, just need help putting it together. For the ControlName, you can cast the sender object to the control and access its Name property.
void SetProperty(Control ctr)
{
foreach (Control control in ctr.Controls)
{
if (control is TextBox)
{
control.Leave += control_Leave;
}
else
{
if (control.HasChildren)
{
SetProperty(control);
}
}
}
}
void control_Leave(object sender, EventArgs e)
{
var textBox = sender as TextBox;
Double value;
if (Double.TryParse(textBox.Text, out value))
textBox.Text = String.Format(System.Globalization.CultureInfo.CurrentCulture, "{0:C2}", value);
else
textBox.Text = String.Empty;
}
Usage:
SetProperty(this);
Also, from my comment on the OP: If accounting is truly important, I would suggest using the Decimal type instead of Double. Double will be faster, but Decimal is more precise. Figure out which trade off makes sense and make a decision based on that.
Edit per comments:
myTextBox.Leave -= control_Leave
If you know the name of the control, the above will work. You will need to do this after you use SetProperty(this). If you want to handle this inside the SetProperty() method, do a check on control.Name == "myTextBox".
You can subscribe multiple controls event(that use the same args) to the same event handler :
public YourFormConstructor()
{
foreach(var textbox in form.Controls.OfType<TextBox>())
textbox.Leave += FormatCurrencyText;
}
private void FormatCurrencyText(object sender, EventArgs e)
{
var textbox = sender as TextBox;
Double value;
if (Double.TryParse(textbox.Text, out value))
textbox.Text = String.Format(System.Globalization.CultureInfo.CurrentCulture, "{0:C2}", value);
else
textbox.Text = String.Empty;
}
I have custom ComboBox, where DropDownStyle = ComboBoxStyle.DropDown;.DropDown style is set because I want to set the Text property of the ComboBox to something outside the list of values. Everything works good, except that ComboBox is highlighting the text when it's left and when I click on the combobox editing is avaible. How can I cope with this?
To illustrate:
First Picture is where everything looks good, second is the highlight situation, third editing is on.
Try un-selecting the text after the DropDown closes:
void comboBox1_DropDownClosed(object sender, EventArgs e) {
this.BeginInvoke(new Action(() => { comboBox1.Select(0, 0); }));
}
If you are referring to disabling the highlighting and editing, then you might want to consider setting the DropdownStyle property to DropdownList.
yourComboBox.DropDownStyle = ComboBoxStyle.DropDownList;
Tricky problem to solve. It seems to be from the Resize event. There are a lot of solutions that do something similar to this, but none that I've seen worked for me until I tried this. (This is a solution that does not require inheritance from ComboBox; inheriting is probably a much more straight forward solution, but requires you to always use your inherited class and never the actual ComboBox class.)
comboBox.Resize += (s, e) => {
if (!comboBox.IsHandleCreated)
return; // avoid possible exception
comboBox.BeginInvoke(new Action(() => comboBox.SelectionLength = 0));
};
Set the selection length to zero to get rid of the highlight, but when? Other examples do it in other places, but the problem seems to be specifically caused by Resize, so doing it after Resize fixes it consistently, at least for me. (Can still see it flicker when you resize the window though, but it always ends up ok.)
BeginInvoke ensures that it happens sufficiently after Resize to work, and the check for IsHandleCreated prevents it from being called before the handle is created, in which case BeginInvoke would throw an exception.
This slightly more complex version includes some checks to prevent a focused control from losing highlight, since it actually should have it. It also doesn't fire if the parent doesn't exist yet, or if the parent does not have an active control yet, both signs that things are too early.
comboBox.Resize += (s, e) => {
if (!comboBox.IsHandleCreated)
return;
comboBox.BeginInvoke(new Action(() => {
var parent = comboBox.FindForm();
if (parent == null)
return;
if (parent.ActiveControl == null)
return;
if (parent.ActiveControl == comboBox)
return;
comboBox.SelectionLength = 0;
}));
};
I tried to make a version that would 'preserve' the selection length rather than always set it to zero, but I couldn't get it to synchronize properly. Many Resize events can fire before the BeginInvoke delegates start to fire, so the preserved value will always be overwritten by the broken one. I tried saving them all in a Queue or Stack, but in both cases, I was unable to reverse the ordering (not really sure why, since that makes no sense).
To solve the same I have tried almost EVERYTHING:
setting the DropdownStyle property to DropdownList
this.BeginInvoke(new Action(() => { comboBox1.Select(0, 0); }));
combobox1.SelectionLength = 0;
changing comboBox.TabIndex
Not tried SendKeys.Send("{ESC}"); because it is not a reliable solution
Nothing helped.
The only stable and working solution was to move a focus on another Label control:
label.Focus();
You could also hide that label.
I know this post is old but recently I have the same problem with combobox.
Situation : I have an editable combobox which propose complete words when user write some letters.
But when I want to type a letter, combobox auto highlight the text and the next letter auto replace the previous.
Solution : I use a textbox to avoid any highlight like that:
<ComboBox IsTextSearchEnabled="False" IsEditable="True" x:Name="CMB_ClientName"/>
<TextBox Text="{Binding ElementName=CMB_ClientName, Path=Text}" TextChanged="ComboBoxChange" x:Name="TXT_ClientName"/>
And I generate the textbox TextChanged event :
private void ComboBoxChange(object sender, TextChangedEventArgs e)
{
//Clear ComboBox items
CMB_ClientName.Items.Clear();
//Auto Open DropDownList
CMB_ClientName.IsDropDownOpen = true;
//Get data from database (use entity framework 6.x)
dbEntity.Client.Load();
//Attribute Data to variable
var clients = dbEntity.Client.Local;
foreach (Client client in clients)
{
//If data begin with the texbox text, the data is add to the combobox items list.
if (client.Nom.ToLower().StartsWith(TXT_NomClient.Text.ToLower()))
{
CMB_ClientName.Items.Add(client.Nom);
}
}
}
I know this solution isn't realy beautifull, but it is for me the easiest solution to avoid highlight text and all the solutions in this post don't work for me.
I hope this solution will be helpfull, thanks for reading.
Math.
Ps: My apologies, my English is not very good. I hope you will understand me correctly.
Nothing worked for me ( I want the form to load with no highlighting in any combobox) until I set the combobox property TabStop to false. This meant that one of my buttons took the tab highlight which I didn't like so I set them all to false for start up and adjusted them programatically as needed.
I know this is an old thread, but my solution is similar to that of the others, but relies on the Form.ResizeEnd event. In its event handler, I iterate through the ComboBoxes and set ComboBox.SelectionLength to 0.
private void Form_ResizeEnd(object sender, EventArgs e)
{
foreach(ComboBox comboBox in parentControl.Controls.OfType<ComboBox>
{
comboBox.SelectionLength = 0;
}
}
This is what worked for me:
Set DrawMode to OwnerDrawFixed
Set cbxSubsystems.DrawItem event to the function below
private void cbxSubsystems_DrawItem(object sender, DrawItemEventArgs e)
{
Color BgClr;
Color TxClr;
if( (e.State & DrawItemState.ComboBoxEdit) == DrawItemState.ComboBoxEdit )
{
// Do not highlight main display
BgClr = cbxSubsystems.BackColor;
TxClr = cbxSubsystems.ForeColor;
}
else
{
BgClr = e.BackColor;
TxClr = e.ForeColor;
}
e.Graphics.FillRectangle(new SolidBrush(BgClr), e.Bounds);
TextRenderer.DrawText(e.Graphics, cbxSubsystems.Items[e.Index].ToString(), e.Font, e.Bounds,
TxClr, BgClr, TextFormatFlags.Left | TextFormatFlags.VerticalCenter );
}
I asked this question previously and did not get an answer but now I have more detail.
Basically I want to programatically display the column sort icon in a wpf datagrid column.
I have the following code to do this:
private void dtgMain_DataContextChanged(object sender, DependencyPropertyChangedEventArgs e)
{
dtgMain.Columns[0].SortDirection = ListSortDirection.Ascending;
}
This seems to set the sort order of the column but when the grid is drawn the icon does not show.
When I add a message box into the method it works fine. My question is twofold. Why would the message box cause the method to work? And how can I get it to work without the use of a messagebox?
This is the method working with the messagebox in it:
private void dtgMain_DataContextChanged(object sender, DependencyPropertyChangedEventArgs e)
{
MessageBox.Show("Here");
dtgMain.Columns[0].SortDirection = ListSortDirection.Ascending;
}
edit
Here is the method that is setting the datacontext of the datagrid
public void processLoad(string response)
{
XmlDataProvider provider = new XmlDataProvider();
if (provider != null)
{
System.Xml.XmlDocument doc = new System.Xml.XmlDocument();
doc.LoadXml(response);
provider.Document = doc;
provider.XPath = "/moo/response/data/load/panel";
dtgMain.DataContext = provider;
}
}
Please let me know if you need anymore information.
OK, I suspect what is happening is that the data layout changes caused by the DataContext update are being completed after your call to set the direction arrow, and it is therefore being erased after you set it. Interestingly, in my case it failed to work even when I put the messagebox in, perhaps because that was hanging up the UI thread while it displayed.
Could you try replacing the line that sets the sort direction with a similar call put on the dispatcher queue:
dtgMain.Dispatcher.BeginInvoke(new Action(() =>
{
dtgMain.Columns[0].SortDirection = ListSortDirection.Ascending;
}), DispatcherPriority.ApplicationIdle);
and see if that works?
I have a treeview with nodes like this: "Foo (1234)", and want to allow the user to rename the nodes, but only the Foo part, without (1234). I first tried to change the node text in BeforeLabelEdit like this:
private void treeView1_BeforeLabelEdit(object sender, NodeLabelEditEventArgs e)
{
e.Node.Text = "Foo";
}
But when I click the node to edit it, "Foo (1234)" appears in the textbox.
Okay, then let's try something else.
I set treeView1.LabelEdit to false, and then do the following:
private void treeView1_MouseClick(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
if (treeView1.SelectedNode == treeView1.GetNodeAt(e.Location))
{
treeView1.SelectedNode.Text = "Foo";
treeView1.LabelEdit = true;
treeView1.SelectedNode.BeginEdit();
}
}
}
And then in AfterLabelEdit, I set LabelEdit back to false.
And guess what? This doesn't work either. It changes the node text to "Foo" but the edit textbox does not appear.
Any ideas?
Thanks
Finally I have found a solution to this on CodeProject. Among the comments at the bottom, you will also find a portable solution.
Heh - I struck that one a few years back. I even left a suggestion on Connect (vote for it!) to allow the label to be changed in BeforeLabelEdit.
One option (in WinForms - it's a different story in WPF) is to use custom painting for your TreeNodes so that the actual label is still "Foo" and you custom draw the " (1234)" after it. It's a bit of a pain to get right though.