I wonder how can I get selected text. (usually done by mouse dragging or shift + arrow on text)
From notepad, word, Internet explorer addressbar, etc.
sending WM_GETTEXT just copy caption, and unable to copy selected text while I rename file name on file explorer.
So, I am considering simulating Ctrl+C. but simulating key strokes seems not a good idea. because it will make side effects.(in case Ctrl+C assigned to other functionality)
I tried following code, wishing copy currently selected text into clipboard
OpenClipboard(0);
EmptyClipboard();
SetClipboardData(CF_TEXT,0);
CloseClipboard();
but no luck, it just emptyclipboard.
how can I copy currently selected text?
(simulating Ctrl+c with no unpredictable effect)
thanks!
(my environments are Windows 7, C programming language, winapi)
I'm not sure if there is a general answer because the various applications you mentioned use different window classes.
For Notepad in particular: The display area seems to be a simple EDIT control. You can use the EM_GETSEL message to retrieve the begin and end of selected text, then use WM_GETTEXT to get the complete text. Do not use GetWindowText because it does not work with windows of another process.
In general, you can try using the WM_COPY message. This should place the text in the clipboard. However, the result depends on how that message handler is implemented in the other application.
You are setting the clipboard using SetClipboardData(CF_TEXT, 0) -- MSDN Doc says that if the second parameter is NULL, the window must process the WM_RENDERFORMAT and WM_RENDERALLFORMATS messages; the same article has a comment on how to allocate Global memory, fill it with the required text and pass it on to SetClipboardData().
Related
I'm currently in the process of coding a GUI for one of the scientific instruments in my research lab. I have mild python experience, however pyqt is entirely new to me. I'm currently working on slots and signals for much of the interface and my current problem is one aspect of text edit.
You can see in the attached photo that I have placeholder text set in the text box for 'Path'. Normally this will never change, but I need it to have the capability to accept input if the user decides to change it. I need to assign this, whether it be the placeholder text or the user input, to a variable titled 'filePath'. What is my best method to accomplish this?
I was considering using an if statement that determines whether or not the text input has changed, but I cannot find the command on any website by which to do this. If there's a better method, I am open to that as well. Thanks for any help!
I am using C# WPF with Avalon Edit Text Box.
I am trying to make all of the text in the text box uppercase and I get an error with additional message 'No undo group should be open at this point'.
I am using the following code:
a.Text = a.Text.ToUpper();
where "a" is the AvalonEdit.TextEditor
Thank you.
Setting the TextEditor.Text property has the side-effect of clearing the undo stack (just as with the normal WPF TextBox). Clearing the undo stack is only allowed when there's no open undo group.
If you did not intend to clear the undo stack, use the methods on textEditor.Document instead to modify the document. You'll want to avoid replacing the whole text, because that would also reset the selection and caret position (after all, AvalonEdit can't know how your new text is related to the old text).
If you do want to clear the undo stack (e.g. you're switching the view to a different document), you'll have to figure out why an undo group is open. Most likely, your code is running from the event handler of an event that is called while the undo group is still open (e.g. document.TextChanged) -- you might want to switch to a different event instead (e.g. document.UpdateFinished is called after the undo group was closed).
If all you want to do is to upper-case text as it is being input, it's better to modify the text before it is added to the document: handle the TextArea.TextEntering event to cancel any lower-case input (set e.Handled = true;), and instead call TextArea.PerformTextInput() to repeat the text input process with the corresponding upper-case text instead.
For copy-paste, you could handle the attached DataObject.PastingEvent and modify the data to be pasted.
I change the text property of labels on a windows form. The form displays the correct new labels when displayed in the VS 2010 forms designer. I also change the color of the font.
When I run the program, the window displays the old text values instead of the new text values. The form displays the new font color on the labels.
There seems to be no occurrences of the old text value in the source code. Where is the old text value still hiding?
I clean the solution and rebuild it, but nothing changes.
A colleague observed that this is an artifact of converting projects from VS2005 to vs2008 to VS2010 and suggested a "brute force" corrective measure.
It actually worked.
1) Create a new blank form in the project.
2) In the original form, using the forms designer "Edit" menu, use the "select all" and "copy" actions. This copies all forms objects into the clipboard.
3) Paste the clipboard into the blank form.
4) Copy (most of) the program code from the old form into the new form, excluding anything generated by the forms designer.
5) Delete the old form from the project. Make changes as necessary to use the new form
Not very elegant, but good for meeting a deadline.
Thank you J.H!
Epilog:
"Brian" and "Blogbeard" both had the right direction in suggesting a hidden resource file.
Early in the execution of the code lay a method call to an obscure subsystem that no one knew anything about. That subsystem turned out to be a defunct language translation module which was supposed to translate all of the labels in a form from a native language to a target language.
It was configured to keep the original labels and their translations in a file outside the scope of the IDE. Changes in the form itself were completely ignored if the translator found the label name in its file.
Moving the form contents to another package effectively disabled the translator.
The elegant solution turned out to a three-line change that removed the method call to the translator. (it was no longer required in the application)
I am writing in C WinAPI a 'Go To Line' dialog of the notepad. I created a number only edit control. But I can still paste words into the edit control! The dialog in the windows notepad does stop this kind of pasting. So how can I do the same thing as it in the notepad?
Subclass the edit control, and when WM_PASTE is received:
OpenClipboard
GetClipboardData
GlobalLock
Now use the returned pointer from GlobalLock to check for non numeric characters. If a non number is found, inform user then:
GlobalUnlock
CloseClipboard
and return 0 from the callback to prevent pasting the data into the edit control.
If it is all numbers, then GlobalUnlock and CLoseClipboard and pass message on with CallWindowProc to allow paste.
The documentation for ES_NUMBER (which is what I presume you're using) says:
Allows only digits to be entered into the edit control. Note that, even with this set, it is still possible to paste non-digits into the edit control.
To prevent pasting non-digits, you'll need to scan through the data in the clipboard and prevent pasting if it contains a non-digit.
I am looking for an embeddable interactive console. I want the user to be able to type in some custom commands, and the application to write command responses in it. Would be awesome if it would understand powershell or python, ans supports command completion.
I already built my own bash-like terminal, but I do not want to totally reinvent the wheel, so I'm looking for a third-party stable component before going any further with it.
If someone is interested, I found PoshConsole, a powershell console:
http://poshconsole.codeplex.com/
Thanks
PS: you can find a screen of what I am trying to achieve here:
http://www.hiboox.fr/go/images-100/codein,0a2809b63e05c3d0cac678962e0e3d5a.jpg.html
Nothing found since I asked the question, and to stick with the "do it yourself" way of thinking:
I wrote a terminal-like control in .NET.
http://wpfterminal.codeplex.com/
You can see an example in this screenshot (terminal is integrated in a bigger project) :
http://images4.hiboox.com/images/4210/0a2809b63e05c3d0cac678962e0e3d5a.jpg
Basic mechanisms
Actually what I did was to define a lastPromptIndex integer, and everytime a user presses the ENTER key and a new prompt appears, this value is updated.
After that, it's simple, you just need to process any text input before the textbox validates the input. If the textbox caret was located before your lastPromptIndex, you need to raise an error (usually a beep sound) and you must invalidate the text input, so nothing is written in the textbox. I also automatically set the caret position to the end of the textbox, so the user can immediatly input some text.
Extensions
You can enable command completion by looking for an "UP key" input if the caret is before the prompt index, etc. What you need is just to process input events before they are sent to the textbox internal mechanisms. I don't know if SWT controls allow it, but I'm pretty sure they do, like any serious UI system.