Re: Problem with sorting ColumnView
Thanks! Somehow I got the impression that the ColumnView would construct
SortListModels on its own, but looking back at the documentation I'm not
sure where I heard that.
Here is a working solution:
#include
> #include
>
> class MyWindow : public Gtk::Window {
> private:
>
> Gtk::ColumnView _columnView;
>
> public:
>
> MyWindow() {
>
> auto listModel = Gio::ListStore::create();
> auto sortListModel = Gtk::SortListModel::create(listModel,
> _columnView.get_sorter());
> _columnView.set_model(Gtk::SingleSelection::create(sortListModel));
>
> auto files = Gio::File::create_for_path(".")->enumerate_children();
> Glib::RefPtr fileInfo;
> while ((fileInfo = files->next_file())) {
>
> listModel->append(Gio::File::create_for_path(fileInfo->get_name()));
> }
>
> auto factory = Gtk::SignalListItemFactory::create();
> factory->signal_setup().connect([](auto listItem) {
> listItem->set_child(*Gtk::make_managed("_",
> Gtk::Align::START));
> });
> factory->signal_bind().connect([](auto listItem) {
> auto data =
> std::dynamic_pointer_cast(listItem->get_item());
> auto label = dynamic_cast(listItem->get_child());
> if (data && label)
> label->set_text(data->get_path());
> });
>
> auto column = Gtk::ColumnViewColumn::create("File Paths", factory);
> column->set_sorter(Gtk::StringSorter::create(
> Gtk::ClosureExpression::create([](auto
> item) {
> auto data = std::dynamic_pointer_cast(item);
> return data->get_basename();
> })
> ));
> _columnView.append_column(column);
>
> _columnView.sort_by_column(column, Gtk::SortType::ASCENDING);
> set_child(_columnView);
> };
> };
>
> int main(int argc, char *argv[]) {
> auto app = Gtk::Application::create("org.gtkmm.examples.base");
> return app->make_window_and_run(argc, argv);
> }
>
I appreciate your help!
Jackson
On Tue, Aug 23, 2022 at 9:38 PM Andrew Potter wrote:
> The documentation at
> https://docs.gtk.org/gtk4/method.ColumnView.get_sorter.html suggests you
> need a SortListModel
>
> On Tue, Aug 23, 2022 at 4:32 AM Jackson Campolattaro via gtkmm-list <
> gtkmm-list@gnome.org> wrote:
>
>> Hello,
>>
>> I'm trying to use the Gtk ColumnView to show a custom ListModel in sorted
>> order. I noticed that when I set a simple sorter for a column and then sort
>> by that column, the order isn't changed. The UI allows me to switch between
>> ascending and descending, but doing so doesn't reverse the list.
>>
>> I've created a simplified example, which is supposed to show the file
>> paths in the current directory in alphabetical order, but doesn't:
>>
>> #include
>>> #include
>>>
>>> class MyWindow : public Gtk::Window {
>>> private:
>>>
>>> Glib::RefPtr> _listModel;
>>> Glib::RefPtr _selectionModel;
>>>
>>> Gtk::ColumnView _columnView;
>>>
>>> public:
>>> MyWindow() {
>>>
>>> _listModel = Gio::ListStore::create();
>>> _selectionModel = Gtk::SingleSelection::create(_listModel);
>>> _columnView.set_model(_selectionModel);
>>>
>>> auto files =
>>> Gio::File::create_for_path(".")->enumerate_children();
>>> Glib::RefPtr fileInfo;
>>> while ((fileInfo = files->next_file())) {
>>>
>>> _listModel->append(Gio::File::create_for_path(fileInfo->get_name()));
>>> }
>>>
>>> auto _factory = Gtk::SignalListItemFactory::create();
>>> _factory->signal_setup().connect([](auto listItem) {
>>>
>>> listItem->set_child(*Gtk::make_managed("Placeholder!"));
>>> });
>>> _factory->signal_bind().connect([](auto listItem) {
>>> auto data =
>>> std::dynamic_pointer_cast(listItem->get_item());
>>> auto label = dynamic_cast>> *>(listItem->get_child());
>>> if (data && label) {
>>> label->set_text(data->get_path());
>>> label->set_xalign(0);
>>> }
>>> });
>>>
>>> auto column = Gtk::ColumnViewColumn::create("File Paths",
>>> _factory);
>>> _columnView.append_column(column);
>>>
>>> column->set_sorter(Gtk::StringSorter::create(
>>> Gtk::ClosureExpression::create([](auto
>>> item) {
>>> auto data =
>>> std::dynamic_pointer_cast(item);
>>> return data->get_path();
>>> })
>>> ));
>>> _columnView.sort_by_column(column, Gtk::SortType::ASCENDING);
>>>
>>> set_child(_columnView);
>>> };
>>> };
>>>
>>> int main(int argc, char *argv[]) {
>>> auto app = Gtk::Application::create("org.gtkmm.examples.base");
>>> return app->make_window_and_run(argc, argv);
>>> }
>>>
>>
>> Perhaps this is a bug, but before I report it I wanted to make sure I'm
>> not doing something wrong.
>>
>> Thanks,
>>
>> Jackson
>> _
Re: Problem with sorting ColumnView
The documentation at
https://docs.gtk.org/gtk4/method.ColumnView.get_sorter.html suggests you
need a SortListModel
On Tue, Aug 23, 2022 at 4:32 AM Jackson Campolattaro via gtkmm-list <
gtkmm-list@gnome.org> wrote:
> Hello,
>
> I'm trying to use the Gtk ColumnView to show a custom ListModel in sorted
> order. I noticed that when I set a simple sorter for a column and then sort
> by that column, the order isn't changed. The UI allows me to switch between
> ascending and descending, but doing so doesn't reverse the list.
>
> I've created a simplified example, which is supposed to show the file
> paths in the current directory in alphabetical order, but doesn't:
>
> #include
>> #include
>>
>> class MyWindow : public Gtk::Window {
>> private:
>>
>> Glib::RefPtr> _listModel;
>> Glib::RefPtr _selectionModel;
>>
>> Gtk::ColumnView _columnView;
>>
>> public:
>> MyWindow() {
>>
>> _listModel = Gio::ListStore::create();
>> _selectionModel = Gtk::SingleSelection::create(_listModel);
>> _columnView.set_model(_selectionModel);
>>
>> auto files =
>> Gio::File::create_for_path(".")->enumerate_children();
>> Glib::RefPtr fileInfo;
>> while ((fileInfo = files->next_file())) {
>>
>> _listModel->append(Gio::File::create_for_path(fileInfo->get_name()));
>> }
>>
>> auto _factory = Gtk::SignalListItemFactory::create();
>> _factory->signal_setup().connect([](auto listItem) {
>>
>> listItem->set_child(*Gtk::make_managed("Placeholder!"));
>> });
>> _factory->signal_bind().connect([](auto listItem) {
>> auto data =
>> std::dynamic_pointer_cast(listItem->get_item());
>> auto label = dynamic_cast> *>(listItem->get_child());
>> if (data && label) {
>> label->set_text(data->get_path());
>> label->set_xalign(0);
>> }
>> });
>>
>> auto column = Gtk::ColumnViewColumn::create("File Paths",
>> _factory);
>> _columnView.append_column(column);
>>
>> column->set_sorter(Gtk::StringSorter::create(
>> Gtk::ClosureExpression::create([](auto
>> item) {
>> auto data =
>> std::dynamic_pointer_cast(item);
>> return data->get_path();
>> })
>> ));
>> _columnView.sort_by_column(column, Gtk::SortType::ASCENDING);
>>
>> set_child(_columnView);
>> };
>> };
>>
>> int main(int argc, char *argv[]) {
>> auto app = Gtk::Application::create("org.gtkmm.examples.base");
>> return app->make_window_and_run(argc, argv);
>> }
>>
>
> Perhaps this is a bug, but before I report it I wanted to make sure I'm
> not doing something wrong.
>
> Thanks,
>
> Jackson
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>
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Re: initialize `background-image` with a resource file
On Tue, Aug 23, 2022 at 10:44 AM Master via gtkmm-list
wrote:
> The problem is that I dont know how to tell the `background-image` inside
> the style provider to "get the image from resource" instead of "file"
> please help me.
>
Hello,
You can set background image to a resource like:
background-image: url("resource:///org/custom/example/sonbg.jpg");
Of course, you must define a gresource xml (Here, I've used the gresource
prefix org/custom/example, but you will want to use your own namespace),
compile it with glib-compile-resources and include it in your build system
appropriately.
This is detailed in the GResource documentation at
https://docs.gtk.org/gio/struct.Resource.html or in the gtkmm documentation
at
https://gnome.pages.gitlab.gnome.org/glibmm/classGio_1_1Resource.html#details
I have a toy application on github that does this if you need a more
concrete example. The C++ code in
https://github.com/talisein/mikuexpocountdown/blob/main/src/window.h loads
the CSS from a resource, and that css references the gresources in
https://github.com/talisein/mikuexpocountdown/tree/main/res
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initialize `background-image` with a resource file
in my gtkmm app i have a label that has a background image thanks to css
provider. like this:
```
MainWindow::MainWindow():
Mylabel(Hello)
{
provider = Gtk::CssProvider::create();
provider->load_from_data(
"#LogoLabel{"
//"color:#80;"
//"color:#5485ae;"
"color:#0075ff;"
"}"
"#PleaseHitKeyLbl{"
"background-color:#337a;"
"font-size:20px;"
"}"
"#BackgroundImage{"
"background-image:url(\"file:///home/ali/Desktop/sonbg.jpg\");"
"background-size:100% 100%;"
"opacity:0.3;"
"}"
);
MyLabel.set_name("BackgroundImage");
MyLabel.get_style_context()->add_provider(provider, 1);
}
```
The problem is that I dont know how to tell the `background-image` inside
the style provider to "get the image from resource" instead of "file"
please help me.
Regards.
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Problem with sorting ColumnView
Hello,
I'm trying to use the Gtk ColumnView to show a custom ListModel in sorted
order. I noticed that when I set a simple sorter for a column and then sort
by that column, the order isn't changed. The UI allows me to switch between
ascending and descending, but doing so doesn't reverse the list.
I've created a simplified example, which is supposed to show the file paths
in the current directory in alphabetical order, but doesn't:
#include
> #include
>
> class MyWindow : public Gtk::Window {
> private:
>
> Glib::RefPtr> _listModel;
> Glib::RefPtr _selectionModel;
>
> Gtk::ColumnView _columnView;
>
> public:
> MyWindow() {
>
> _listModel = Gio::ListStore::create();
> _selectionModel = Gtk::SingleSelection::create(_listModel);
> _columnView.set_model(_selectionModel);
>
> auto files = Gio::File::create_for_path(".")->enumerate_children();
> Glib::RefPtr fileInfo;
> while ((fileInfo = files->next_file())) {
>
> _listModel->append(Gio::File::create_for_path(fileInfo->get_name()));
> }
>
> auto _factory = Gtk::SignalListItemFactory::create();
> _factory->signal_setup().connect([](auto listItem) {
>
> listItem->set_child(*Gtk::make_managed("Placeholder!"));
> });
> _factory->signal_bind().connect([](auto listItem) {
> auto data =
> std::dynamic_pointer_cast(listItem->get_item());
> auto label = dynamic_cast(listItem->get_child());
> if (data && label) {
> label->set_text(data->get_path());
> label->set_xalign(0);
> }
> });
>
> auto column = Gtk::ColumnViewColumn::create("File Paths",
> _factory);
> _columnView.append_column(column);
>
> column->set_sorter(Gtk::StringSorter::create(
> Gtk::ClosureExpression::create([](auto
> item) {
> auto data = std::dynamic_pointer_cast(item);
> return data->get_path();
> })
> ));
> _columnView.sort_by_column(column, Gtk::SortType::ASCENDING);
>
> set_child(_columnView);
> };
> };
>
> int main(int argc, char *argv[]) {
> auto app = Gtk::Application::create("org.gtkmm.examples.base");
> return app->make_window_and_run(argc, argv);
> }
>
Perhaps this is a bug, but before I report it I wanted to make sure I'm not
doing something wrong.
Thanks,
Jackson
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