Sample Code 89: How to respond to enter in GtkTextView? |
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Written by kksou
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Wednesday, 08 November 2006 |
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Problem You want to insert and display text at the end of the GtkTextView as shown below:
Solution
Sample Code Note: If you have installed php-gtk2 using Gnope Installer on Windows, and if running the sample code below gives you warning that the Symbolic names for keys (e.g. Gdk::KEY_Return) is not defined, you might want to update your php-gtk2 with the latest php-gtk2.dll available here. Simply download the php-gtk2.dll and replace the copy in the folder php-gtk2\ext. The latest compilation has put in the Symbolic names for keys listed here.
Note: Click the "Insert Text" toolbar button to insert text at the end of textview.
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| <?php
$window = new GtkWindow();
$window->set_size_request(400, 300);
$window->connect_simple('destroy', array('Gtk','main_quit'));
$window->add($vbox = new GtkVBox());
$vbox->pack_start($hbox = new GtkHBox(), 0, 0);
$hbox->set_size_request(-1, 2);
// Create the top textview to display the conversation
$buffer1 = new GtkTextBuffer();
$view1 = new GtkTextView();
$view1->set_buffer($buffer1);
$view1->modify_font(new PangoFontDescription("Arial 9"));
$view1->set_wrap_mode(Gtk::WRAP_WORD);
$scrolled_win1 = new GtkScrolledWindow();
$scrolled_win1->set_policy( Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);
$frame1 = new GtkFrame();
$frame1->add($scrolled_win1);
$vbox->pack_start($frame1, 0, 0);
$scrolled_win1->add($view1);
$scrolled_win1->set_size_request(400,200);
$vbox->pack_start($hbox = new GtkHBox(), 0, 0);
$hbox->set_size_request(-1, 1);
// Create the bottom textview to type your message
$buffer2 = new GtkTextBuffer();
$view2 = new GtkTextView();
$view2->set_buffer($buffer2);
$view2->modify_font(new PangoFontDescription("Arial 9"));
$view2->set_wrap_mode(Gtk::WRAP_WORD);
$scrolled_win2 = new GtkScrolledWindow();
$scrolled_win2->set_policy( Gtk::POLICY_AUTOMATIC, Gtk::POLICY_AUTOMATIC);
$frame2 = new GtkFrame();
$frame2->add($scrolled_win2);
$vbox->pack_start($frame2, 0, 0);
$scrolled_win2->add($view2);
$view2->connect('key-press-event', 'on_key_press', $view1, $buffer1, $view2, $buffer2); // note 1
$scrolled_win2->set_size_request(400,80);
$view2->grab_focus();
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Explanation The above example make use of the sample code in How to insert and display text at end of GtkTextView?
What's new here:
- Grab the Enter key with key-press-event.
- Get the new message typed.
- Go to end of buffer, insert the text, and scroll to end of text.
- If it's shift-Enter, leave it as line breaks.
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