C++ source, ASCII text
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#include "gpanthera.hh"
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#include <iostream>
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#include <utility>
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#include <libintl.h>
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#include <locale.h>
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#include <filesystem>
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#define _(STRING) gettext(STRING)
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namespace gPanthera {
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std::vector<Gtk::Widget*> collect_children(Gtk::Widget &widget) {
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// Get a vector of the children of a GTK widget, since the container API was removed in GTK 4
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std::vector<Gtk::Widget*> children;
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for(auto *child = widget.get_first_child(); child; child = child->get_next_sibling()) {
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children.push_back(child);
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}
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return children;
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}
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Gtk::Image *copy_image(Gtk::Image *image) {
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// Generate a new Gtk::Image with the same contents as an existing one
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if(image->get_storage_type() == Gtk::Image::Type::PAINTABLE) {
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return Gtk::make_managed<Gtk::Image>(image->get_paintable());
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} else if(image->get_storage_type() == Gtk::Image::Type::ICON_NAME) {
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auto new_image = Gtk::make_managed<Gtk::Image>();
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new_image->set_from_icon_name(image->get_icon_name());
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return new_image;
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} else {
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return nullptr;
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}
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}
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void init() {
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// Set up gettext configuration
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setlocale(LC_ALL, "");
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bindtextdomain("gpanthera", "./locales");
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textdomain("gpanthera");
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}
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DockablePane::DockablePane(std::shared_ptr<LayoutManager> layout, Gtk::Widget &child, const Glib::ustring &name, const Glib::ustring &label, Gtk::Image *icon, DockStack *stack, Gtk::Widget *custom_header)
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: Gtk::Box(Gtk::Orientation::VERTICAL, 0), name(name) {
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if(icon) {
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this->icon = icon;
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}
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if(stack) {
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this->stack = stack;
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}
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this->layout = std::move(layout);
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this->label.set_text(label);
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// This should be replaced with a custom class in the future
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header = std::make_unique<Gtk::HeaderBar>();
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header->set_show_title_buttons(false);
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if(custom_header) {
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header->set_title_widget(*custom_header);
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} else {
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header->set_title_widget(this->label);
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}
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header->add_css_class("gpanthera-dock-titlebar");
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auto header_menu_button = Gtk::make_managed<Gtk::MenuButton>();
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auto header_menu = Gio::Menu::create();
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header_menu_button->set_direction(Gtk::ArrowType::NONE);
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// Pane menu
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this->action_group = Gio::SimpleActionGroup::create();
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header_menu_button->insert_action_group("win", action_group);
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// Close action
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auto close_action = Gio::SimpleAction::create("close");
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close_action->signal_activate().connect([this](const Glib::VariantBase&) {
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if(this->stack) {
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this->stack->set_visible_child("empty");
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}
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});
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action_group->add_action(close_action);
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header_menu->append(_("Close"), "win.close");
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// Pop out action
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auto pop_out_action = Gio::SimpleAction::create("pop_out");
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pop_out_action->signal_activate().connect([this](const Glib::VariantBase&) {
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if(this->stack) {
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this->pop_out();
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}
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});
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action_group->add_action(pop_out_action);
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header_menu->append(_("Pop out"), "win.pop_out");
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// Move menu
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auto move_menu = Gio::Menu::create();
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for(auto &this_stack : this->layout->stacks) {
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auto action_name = "move_" + this_stack->name;
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auto move_action = Gio::SimpleAction::create(action_name);
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move_action->signal_activate().connect([this, this_stack](const Glib::VariantBase&) {
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this_stack->add_pane(*this);
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});
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action_group->add_action(move_action);
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move_menu->append(this_stack->name, "win." + action_name);
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}
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// Add move submenu
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header_menu->append_submenu(_("Move"), move_menu);
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// Switch to traditional (nested) submenus, not sliding
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auto popover_menu = Gtk::make_managed<Gtk::PopoverMenu>(header_menu, Gtk::PopoverMenu::Flags::NESTED);
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popover_menu->set_has_arrow(false);
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header_menu_button->set_popover(*popover_menu);
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// TODO: Add a context menu as well
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header->pack_end(*header_menu_button);
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this->prepend(*header);
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this->child = &child;
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this->append(child);
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}
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Gtk::Stack *DockablePane::get_stack() const {
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return stack;
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}
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void DockablePane::redock(DockStack *stack) {
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if(this->window != nullptr) {
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this->window->hide();
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// Put the titlebar back
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this->window->unset_titlebar();
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this->window->set_decorated(false);
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this->header->get_style_context()->remove_class("titlebar");
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this->prepend(*this->header);
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this->window->unset_child();
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this->window->close();
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} else if(this->stack == this->get_parent()) {
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this->stack->remove(*this);
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}
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this->stack = stack;
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this->last_stack = stack;
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this->stack->add(*this, this->get_identifier());
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if(this->window != nullptr) {
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this->window->destroy();
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delete this->window;
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this->window = nullptr;
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// Re-enable the pop out option
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auto action = std::dynamic_pointer_cast<Gio::SimpleAction>(this->action_group->lookup_action("pop_out"));
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action->set_enabled(true);
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this->header->get_style_context()->remove_class("gpanthera-dock-titlebar-popout");
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}
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}
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void DockablePane::pop_out() {
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if(this->stack != nullptr) {
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this->stack->remove(*this);
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this->stack = nullptr;
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}
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if(this->window == nullptr) {
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// Remove the header bar from the pane, so it can be used as the titlebar of the window
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this->remove(*this->header);
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this->window = new DockWindow(this);
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this->window->set_titlebar(*this->header);
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this->window->set_child(*this);
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this->window->set_decorated(true);
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// Grey out the pop-out option
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auto action = std::dynamic_pointer_cast<Gio::SimpleAction>(this->action_group->lookup_action("pop_out"));
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action->set_enabled(false);
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this->header->get_style_context()->add_class("gpanthera-dock-titlebar-popout");
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}
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this->window->present();
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}
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Glib::ustring DockablePane::get_identifier() const {
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return name;
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}
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Gtk::Image *DockablePane::get_icon() const {
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return icon;
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}
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Gtk::Widget *DockablePane::get_child() const {
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return child;
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}
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Gtk::Label *DockablePane::get_label() {
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return &label;
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}
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LayoutManager::LayoutManager() : Glib::ObjectBase("LayoutManager") {
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}
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void LayoutManager::add_pane(DockablePane *pane) {
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panes.push_back(pane);
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}
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void LayoutManager::add_stack(DockStack *stack) {
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stacks.push_back(stack);
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}
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void LayoutManager::remove_pane(DockablePane *pane) {
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panes.erase(std::ranges::remove(panes, pane).begin(), panes.end());
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}
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void LayoutManager::remove_stack(DockStack *stack) {
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stacks.erase(std::ranges::remove(stacks, stack).begin(), stacks.end());
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}
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DockStack::DockStack(std::shared_ptr<LayoutManager> layout, const Glib::ustring &name) : Gtk::Stack(), layout(layout), name(name) {
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auto *empty_child = Gtk::make_managed<Gtk::Box>(Gtk::Orientation::VERTICAL, 0);
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add(*empty_child, "empty");
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// Add the stack to a layout manager
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this->layout->add_stack(this);
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// Hide the stack when the empty child is visible
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this->property_visible_child_name().signal_changed().connect([this]() {
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if(this->get_visible_child_name() == "empty") {
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this->hide();
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} else {
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this->show();
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}
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});
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// Also hide when the visible child is removed
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this->signal_child_removed.connect([this](Gtk::Widget* const &child) {
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if(this->get_visible_child_name() == "" || this->get_visible_child_name() == "empty") {
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this->hide();
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}
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});
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this->set_visible_child("empty");
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this->hide();
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}
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DockWindow::DockWindow(DockablePane *pane) {
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this->pane = pane;
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this->set_child(*pane);
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// Attempting to close the window should redock the pane so it doesn't vanish
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this->signal_close_request().connect([this]() {
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this->pane->redock(this->pane->last_stack);
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return true;
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}, false);
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}
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DockStackSwitcher::DockStackSwitcher(DockStack *stack, Gtk::Orientation orientation) : Gtk::Box(orientation), stack(stack) {
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auto update_callback = [this](Gtk::Widget*) {
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this->update_buttons();
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};
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this->property_accessible_role().set_value(Gtk::Accessible::Role::TAB_LIST);
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stack->signal_child_added.connect(update_callback);
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stack->signal_child_removed.connect(update_callback);
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this->get_style_context()->add_class("gpanthera-dock-switcher");
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drop_target = Gtk::DropTarget::create(DockablePane::get_type(), Gdk::DragAction::MOVE);
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this->add_controller(drop_target);
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// Process dropped buttons
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drop_target->signal_drop().connect([this](const Glib::ValueBase& value, double x, double y) {
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const auto &widget = static_cast<const Glib::Value<Gtk::Widget*>&>(value).get();
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if(widget) {
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if(auto pane = dynamic_cast<DockablePane*>(widget)) {
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this->stack->add_pane(*pane);
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}
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}
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return true; // Drop OK
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}, false);
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}
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DockStack *DockStackSwitcher::get_stack() const {
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return stack;
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}
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DockStackSwitcher::~DockStackSwitcher() {
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add_handler.disconnect();
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remove_handler.disconnect();
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}
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DockButton::DockButton(DockablePane *pane) : Gtk::Button(), pane(pane) {
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if(pane->get_icon()) {
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this->set_child(*copy_image(pane->get_icon()));
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}
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this->property_accessible_role().set_value(Gtk::Accessible::Role::TAB);
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this->set_tooltip_text(pane->get_label()->get_text());
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this->set_halign(Gtk::Align::CENTER);
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this->set_valign(Gtk::Align::CENTER);
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this->get_style_context()->add_class("toggle");
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this->get_style_context()->add_class("gpanthera-dock-button");
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// Add/remove CSS classes when the pane is shown/hidden
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active_style_handler = this->pane->get_stack()->property_visible_child_name().signal_changed().connect([this]() {
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this->update_active_style();
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});
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drag_source = Gtk::DragSource::create();
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drag_source->set_exclusive(false);
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// This is to prevent the click handler from taking over grabbing the button
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drag_source->set_propagation_phase(Gtk::PropagationPhase::CAPTURE);
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value = Glib::Value<Gtk::Widget*>();
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value.init(DockablePane::get_type());
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value.set(pane);
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// Add the drag source to the button
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this->add_controller(drag_source);
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this->signal_clicked().connect([this, pane]() {
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if(pane->get_stack()->get_visible_child_name() == pane->get_identifier()) {
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pane->get_stack()->set_visible_child("empty");
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} else {
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pane->get_stack()->set_visible_child(pane->get_identifier());
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}
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});
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// Provide the drag data
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drag_source->signal_prepare().connect([this](double, double) {
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drag_source->set_actions(Gdk::DragAction::MOVE);
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auto const paintable = Gtk::WidgetPaintable::create();
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paintable->set_widget(*this);
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drag_source->set_icon(paintable, 0, 0);
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return Gdk::ContentProvider::create(value);
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}, false);
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// Pop out if dragged to an external location
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drag_source->signal_drag_cancel().connect([this](const Glib::RefPtr<Gdk::Drag>&, Gdk::DragCancelReason reason) {
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if(reason == Gdk::DragCancelReason::NO_TARGET) {
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this->pane->pop_out();
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return true;
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}
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return false;
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}, false);
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// Add a drop target to the button
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auto drop_target = Gtk::DropTarget::create(DockablePane::get_type(), Gdk::DragAction::MOVE);
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drop_target->set_actions(Gdk::DragAction::MOVE);
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drop_target->set_propagation_phase(Gtk::PropagationPhase::CAPTURE);
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this->add_controller(drop_target);
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// Process dropped buttons by inserting them after the current button
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drop_target->signal_drop().connect([this](const Glib::ValueBase& value, double x, double y) {
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const auto &widget = static_cast<const Glib::Value<Gtk::Widget*>&>(value).get();
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if(widget) {
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if(auto pane = dynamic_cast<DockablePane*>(widget)) {
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auto switcher = dynamic_cast<DockStackSwitcher*>(this->get_parent());
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if(switcher) {
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auto *stack = switcher->get_stack();
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// Move the button to the new position
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pane->redock(stack);
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pane->insert_before(*stack, *this->pane);
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switcher->update_buttons();
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}
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}
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}
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return true; // Drop OK
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}, false);
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this->update_active_style();
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}
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void DockButton::update_active_style() {
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if(this->pane->get_stack()->get_visible_child_name() == this->pane->get_identifier()) {
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this->add_css_class("checked");
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this->add_css_class("gpanthera-dock-button-active");
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} else {
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this->remove_css_class("checked");
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this->remove_css_class("gpanthera-dock-button-active");
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}
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}
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DockButton::~DockButton() {
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active_style_handler.disconnect();
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}
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void DockStackSwitcher::update_buttons() {
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// Clear the old buttons
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auto old_buttons = collect_children(*this);
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for(auto *button : old_buttons) {
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remove(*button);
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}
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for(auto *widget = stack->get_first_child(); widget; widget = widget->get_next_sibling()) {
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if(auto pane = dynamic_cast<DockablePane*>(widget)) {
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auto *button = Gtk::make_managed<DockButton>(pane);
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if(pane->get_identifier() != Glib::ustring("empty")) {
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append(*button);
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}
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}
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}
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}
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void DockStack::add_pane(DockablePane &child) {
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child.redock(this);
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}
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void DockStack::add(Gtk::Widget &child, const Glib::ustring &name) {
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Gtk::Stack::add(child, name);
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signal_child_added.emit(&child);
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}
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void DockStack::remove(Gtk::Widget &child) {
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Gtk::Stack::remove(child);
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signal_child_removed.emit(&child);
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}
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} // namespace gPanthera
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