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pluginlist: avoid mulitple init

Browse source 
Allow only one initialization of the plugin
list.
This commit is contained in:
Stéphane Cerveau 2021-12-17 12:50:28 +01:00
parent 914fc1f077
commit c16102928b
2 changed files with 53 additions and 45 deletions
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3
src/app.rs
View file

@ -24,6 +24,7 @@ use gtk::{
AboutDialog, Application, ApplicationWindow, Builder, Button, FileChooserAction,
FileChooserDialog, PopoverMenu, ResponseType, Statusbar, Viewport,
};
use once_cell::unsync::OnceCell;
use std::cell::RefCell;
use std::collections::HashMap;
use std::rc::{Rc, Weak};
@ -40,6 +41,7 @@ pub struct GPSAppInner {
pub graphview: RefCell<GraphView>,
pub builder: Builder,
pub pipeline: RefCell<Pipeline>,
pub plugin_list_initialized: OnceCell<bool>,
}
// This represents our main application window.
@ -82,6 +84,7 @@ impl GPSApp {
graphview: RefCell::new(GraphView::new()),
builder,
pipeline: RefCell::new(pipeline),
plugin_list_initialized: OnceCell::new(),
}));
Ok(app)
}

95
src/plugindialogs.rs
View file

@ -62,62 +62,67 @@ pub fn display_plugin_list(app: &GPSApp, elements: &[ElementInfo]) {
.object("dialog-plugin-list")
.expect("Couldn't get window");
dialog.set_title(Some("Plugin list"));
dialog.set_default_size(640, 480);
if app.plugin_list_initialized.get().is_none() {
dialog.set_title(Some("Plugin list"));
dialog.set_default_size(640, 480);
let text_view: TextView = app
.builder
.object("textview-plugin-list")
.expect("Couldn't get window");
let text_buffer: TextBuffer = text_view.buffer();
let text_view: TextView = app
.builder
.object("textview-plugin-list")
.expect("Couldn't get window");
let text_buffer: TextBuffer = text_view.buffer();
let tree: TreeView = app
.builder
.object("treeview-plugin-list")
.expect("Couldn't get window");
if tree.n_columns() < 2 {
append_column(&tree, 0);
append_column(&tree, 1);
}
tree.set_search_column(1);
let model = create_and_fill_model(elements);
// Setting the model into the view.
tree.set_model(Some(&model));
// The closure responds to selection changes by connection to "::cursor-changed" signal,
// that gets emitted when the cursor moves (focus changes).
tree.connect_cursor_changed(glib::clone!(@weak dialog, @weak text_buffer => move |tree_view| {
let selection = tree_view.selection();
if let Some((model, iter)) = selection.selected() {
let element_name = model
.get(&iter, 1)
.get::<String>()
.expect("Treeview selection, column 1");
let description = Pipeline::element_description(&element_name).expect("Unable to get element list from GStreamer");
text_buffer.set_text("");
text_buffer.insert_markup(&mut text_buffer.end_iter(), &description);
let tree: TreeView = app
.builder
.object("treeview-plugin-list")
.expect("Couldn't get window");
if tree.n_columns() < 2 {
append_column(&tree, 0);
append_column(&tree, 1);
}
tree.set_search_column(1);
let model = create_and_fill_model(elements);
// Setting the model into the view.
tree.set_model(Some(&model));
}));
let app_weak = app.downgrade();
tree.connect_row_activated(
glib::clone!(@weak dialog => move |tree_view, _tree_path, _tree_column| {
let app = upgrade_weak!(app_weak);
// The closure responds to selection changes by connection to "::cursor-changed" signal,
// that gets emitted when the cursor moves (focus changes).
tree.connect_cursor_changed(glib::clone!(@weak dialog, @weak text_buffer => move |tree_view| {
let selection = tree_view.selection();
if let Some((model, iter)) = selection.selected() {
// Now getting back the values from the row corresponding to the
// iterator `iter`.
//
let element_name = model
.get(&iter, 1)
.get::<String>()
.expect("Treeview selection, column 1");
println!("{}", element_name);
app.add_new_element(element_name);
let description = Pipeline::element_description(&element_name).expect("Unable to get element list from GStreamer");
text_buffer.set_text("");
text_buffer.insert_markup(&mut text_buffer.end_iter(), &description);
}
}),
);
}));
let app_weak = app.downgrade();
tree.connect_row_activated(
glib::clone!(@weak dialog => move |tree_view, _tree_path, _tree_column| {
let app = upgrade_weak!(app_weak);
let selection = tree_view.selection();
if let Some((model, iter)) = selection.selected() {
// Now getting back the values from the row corresponding to the
// iterator `iter`.
//
let element_name = model
.get(&iter, 1)
.get::<String>()
.expect("Treeview selection, column 1");
println!("{}", element_name);
app.add_new_element(element_name);
}
}),
);
app.plugin_list_initialized
.set(true)
.expect("Should never happen");
}
dialog.show();
}