import gi gi.require_version("Gtk", "4.0") from gi.repository import Gtk, Pango class SearchDialog(Gtk.Window): def __init__(self, parent): super().__init__(title="Search", transient_for=parent) box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=12) self.set_child(box) label = Gtk.Label(label="Insert text you want to search for:") box.append(label) self.entry = Gtk.Entry() box.append(self.entry) self.button = Gtk.Button(label="Find") box.append(self.button) class TextViewWindow(Gtk.ApplicationWindow): def __init__(self, **kargs): super().__init__(**kargs, title="TextView Demo") self.set_default_size(500, 400) self.box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=6) self.set_child(self.box) self.create_textview() self.create_toolbar() self.create_buttons() def create_toolbar(self): toolbar = Gtk.Box(spacing=6) toolbar.props.margin_top = 6 toolbar.props.margin_start = 6 toolbar.props.margin_end = 6 self.box.prepend(toolbar) button_bold = Gtk.Button(icon_name="format-text-bold-symbolic") toolbar.append(button_bold) button_italic = Gtk.Button(icon_name="format-text-italic-symbolic") toolbar.append(button_italic) button_underline = Gtk.Button(icon_name="format-text-underline-symbolic") toolbar.append(button_underline) button_bold.connect("clicked", self.on_button_clicked, self.tag_bold) button_italic.connect("clicked", self.on_button_clicked, self.tag_italic) button_underline.connect("clicked", self.on_button_clicked, self.tag_underline) toolbar.append(Gtk.Separator()) justifyleft = Gtk.ToggleButton(icon_name="format-justify-left-symbolic") toolbar.append(justifyleft) justifycenter = Gtk.ToggleButton(icon_name="format-justify-center-symbolic") justifycenter.set_group(justifyleft) toolbar.append(justifycenter) justifyright = Gtk.ToggleButton(icon_name="format-justify-right-symbolic") justifyright.set_group(justifyleft) toolbar.append(justifyright) justifyfill = Gtk.ToggleButton(icon_name="format-justify-fill-symbolic") justifyfill.set_group(justifyleft) toolbar.append(justifyfill) justifyleft.connect("toggled", self.on_justify_toggled, Gtk.Justification.LEFT) justifycenter.connect( "toggled", self.on_justify_toggled, Gtk.Justification.CENTER ) justifyright.connect( "toggled", self.on_justify_toggled, Gtk.Justification.RIGHT ) justifyfill.connect("toggled", self.on_justify_toggled, Gtk.Justification.FILL) toolbar.append(Gtk.Separator()) button_clear = Gtk.Button(icon_name="edit-clear-symbolic") button_clear.connect("clicked", self.on_clear_clicked) toolbar.append(button_clear) toolbar.append(Gtk.Separator()) button_search = Gtk.Button(icon_name="system-search-symbolic") button_search.connect("clicked", self.on_search_clicked) toolbar.append(button_search) def create_textview(self): scrolledwindow = Gtk.ScrolledWindow() scrolledwindow.props.hexpand = True scrolledwindow.props.vexpand = True self.box.append(scrolledwindow) self.textview = Gtk.TextView() self.textbuffer = self.textview.get_buffer() self.textbuffer.set_text( "This is some text inside of a Gtk.TextView. " + 'Select text and click one of the buttons "bold", "italic", ' + 'or "underline" to modify the text accordingly.' ) scrolledwindow.set_child(self.textview) self.tag_bold = self.textbuffer.create_tag("bold", weight=Pango.Weight.BOLD) self.tag_italic = self.textbuffer.create_tag("italic", style=Pango.Style.ITALIC) self.tag_underline = self.textbuffer.create_tag( "underline", underline=Pango.Underline.SINGLE ) self.tag_found = self.textbuffer.create_tag("found", background="yellow") def create_buttons(self): grid = Gtk.Grid() self.box.append(grid) check_editable = Gtk.CheckButton(label="Editable") check_editable.props.active = True check_editable.connect("toggled", self.on_editable_toggled) grid.attach(check_editable, 0, 0, 1, 1) check_cursor = Gtk.CheckButton(label="Cursor Visible") check_cursor.props.active = True check_editable.connect("toggled", self.on_cursor_toggled) grid.attach_next_to(check_cursor, check_editable, Gtk.PositionType.RIGHT, 1, 1) radio_wrapnone = Gtk.CheckButton(label="No Wrapping") radio_wrapnone.props.active = True grid.attach(radio_wrapnone, 0, 1, 1, 1) radio_wrapchar = Gtk.CheckButton(label="Character Wrapping") radio_wrapchar.set_group(radio_wrapnone) grid.attach_next_to( radio_wrapchar, radio_wrapnone, Gtk.PositionType.RIGHT, 1, 1 ) radio_wrapword = Gtk.CheckButton(label="Word Wrapping") radio_wrapword.set_group(radio_wrapnone) grid.attach_next_to( radio_wrapword, radio_wrapchar, Gtk.PositionType.RIGHT, 1, 1 ) radio_wrapnone.connect("toggled", self.on_wrap_toggled, Gtk.WrapMode.NONE) radio_wrapchar.connect("toggled", self.on_wrap_toggled, Gtk.WrapMode.CHAR) radio_wrapword.connect("toggled", self.on_wrap_toggled, Gtk.WrapMode.WORD) def on_button_clicked(self, _widget, tag): bounds = self.textbuffer.get_selection_bounds() if len(bounds) != 0: start, end = bounds self.textbuffer.apply_tag(tag, start, end) def on_clear_clicked(self, _widget): start = self.textbuffer.get_start_iter() end = self.textbuffer.get_end_iter() self.textbuffer.remove_all_tags(start, end) def on_editable_toggled(self, widget): self.textview.props.editable = widget.props.active def on_cursor_toggled(self, widget): self.textview.props.cursor_visible = widget.props.active def on_wrap_toggled(self, _widget, mode): self.textview.props.wrap_mode = mode def on_justify_toggled(self, _widget, justification): self.textview.props.justification = justification def on_search_clicked(self, _widget): self.search_dialog = SearchDialog(self) self.search_dialog.button.connect("clicked", self.on_find_clicked) self.search_dialog.present() def on_find_clicked(self, _button): cursor_mark = self.textbuffer.get_insert() start = self.textbuffer.get_iter_at_mark(cursor_mark) if start.get_offset() == self.textbuffer.get_char_count(): start = self.textbuffer.get_start_iter() self.search_and_mark(self.search_dialog.entry.get_text(), start) def search_and_mark(self, text, start): end = self.textbuffer.get_end_iter() match = start.forward_search(text, 0, end) if match is not None: match_start, match_end = match self.textbuffer.apply_tag(self.tag_found, match_start, match_end) self.search_and_mark(text, match_end) def on_activate(app): win = TextViewWindow(application=app) win.present() app = Gtk.Application(application_id="com.example.App") app.connect("activate", on_activate) app.run(None)