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| -rw-r--r-- | src/ui/dialog/dialog-multipaned.h | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/src/ui/dialog/dialog-multipaned.h b/src/ui/dialog/dialog-multipaned.h new file mode 100644 index 0000000..1d1bb50 --- /dev/null +++ b/src/ui/dialog/dialog-multipaned.h @@ -0,0 +1,201 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#ifndef INKSCAPE_UI_DIALOG_MULTIPANED_H +#define INKSCAPE_UI_DIALOG_MULTIPANED_H + +/** @file + * @brief A widget with multiple panes. Agnostic to type what kind of widgets panes contain. + * + * Authors: see git history + * Tavmjong Bah + * + * Copyright (c) 2020 Tavmjong Bah, Authors + * + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#include <glibmm/refptr.h> +#include <gtkmm/enums.h> +#include <gtkmm/eventbox.h> +#include <gtkmm/gesturedrag.h> +#include <gtkmm/orientable.h> +#include <gtkmm/widget.h> + +namespace Inkscape { +namespace UI { +namespace Dialog { + +/** A widget with multiple panes */ + +class MyDropZone; +class MyHandle; +class DialogMultipaned; + +/* ============ DROPZONE ============ */ + +/** + * Dropzones are eventboxes at the ends of a DialogMultipaned where you can drop dialogs. + */ +class MyDropZone + : public Gtk::Orientable + , public Gtk::EventBox +{ +public: + MyDropZone(Gtk::Orientation orientation); + ~MyDropZone() override; + + static void add_highlight_instances(); + static void remove_highlight_instances(); + +private: + void set_size(int size); + bool _active = false; + void add_highlight(); + void remove_highlight(); + + static std::list<MyDropZone *> _instances_list; +}; + +/* ============ HANDLE ============ */ + +/** + * Handles are event boxes that help with resizing DialogMultipaned' children. + */ +class MyHandle + : public Gtk::Orientable + , public Gtk::EventBox +{ +public: + MyHandle(Gtk::Orientation orientation, int size); + ~MyHandle() override = default; + + bool on_enter_notify_event(GdkEventCrossing *crossing_event) override; + void set_dragging(bool dragging); +private: + bool on_leave_notify_event(GdkEventCrossing* crossing_event) override; + bool on_button_press_event(GdkEventButton* button_event) override; + bool on_button_release_event(GdkEventButton *event) override; + bool on_motion_notify_event(GdkEventMotion* motion_event) override; + void toggle_multipaned(); + void update_click_indicator(double x, double y); + void show_click_indicator(bool show); + bool on_draw(const Cairo::RefPtr<Cairo::Context>& cr) override; + Cairo::Rectangle get_active_click_zone(); + int _cross_size; + Gtk::Widget *_child; + void resize_handler(Gtk::Allocation &allocation); + bool is_click_resize_active() const; + bool _click = false; + bool _click_indicator = false; + bool _dragging = false; +}; + +/* ============ MULTIPANE ============ */ + +/* + * A widget with multiple panes. Agnostic to type what kind of widgets panes contain. + * Handles allow a user to resize children widgets. Drop zones allow adding widgets + * at either end. + */ +class DialogMultipaned + : public Gtk::Orientable + , public Gtk::Container +{ +public: + DialogMultipaned(Gtk::Orientation orientation = Gtk::ORIENTATION_HORIZONTAL); + ~DialogMultipaned() override; + + void prepend(Gtk::Widget *new_widget); + void append(Gtk::Widget *new_widget); + + // Getters and setters + Gtk::Widget *get_first_widget(); + Gtk::Widget *get_last_widget(); + std::vector<Gtk::Widget *> get_children() { return children; } + void set_target_entries(const std::vector<Gtk::TargetEntry> &target_entries); + bool has_empty_widget() { return (bool)_empty_widget; } + + // Signals + sigc::signal<void, const Glib::RefPtr<Gdk::DragContext>> signal_prepend_drag_data(); + sigc::signal<void, const Glib::RefPtr<Gdk::DragContext>> signal_append_drag_data(); + sigc::signal<void> signal_now_empty(); + + // UI functions + void set_dropzone_sizes(int start, int end); + void toggle_multipaned_children(bool show); + void children_toggled(); + void ensure_multipaned_children(); + +protected: + // Overrides + Gtk::SizeRequestMode get_request_mode_vfunc() const override; + void get_preferred_width_vfunc(int &minimum_width, int &natural_width) const override; + void get_preferred_height_vfunc(int &minimum_height, int &natural_height) const override; + void get_preferred_width_for_height_vfunc(int height, int &minimum_width, int &natural_width) const override; + void get_preferred_height_for_width_vfunc(int width, int &minimum_height, int &natural_height) const override; + void on_size_allocate(Gtk::Allocation &allocation) override; + + // Allow us to keep track of our widgets ourselves. + void forall_vfunc(gboolean include_internals, GtkCallback callback, gpointer callback_data) override; + + void on_add(Gtk::Widget *child) override; + void on_remove(Gtk::Widget *child) override; + + // Signals + sigc::signal<void, const Glib::RefPtr<Gdk::DragContext>> _signal_prepend_drag_data; + sigc::signal<void, const Glib::RefPtr<Gdk::DragContext>> _signal_append_drag_data; + sigc::signal<void> _signal_now_empty; + +private: + // We must manage children ourselves. + std::vector<Gtk::Widget *> children; + + // Values used when dragging handle. + int _handle = -1; // Child number of active handle + int _drag_handle = -1; + Gtk::Widget* _resizing_widget1 = nullptr; + Gtk::Widget* _resizing_widget2 = nullptr; + Gtk::Widget* _hide_widget1 = nullptr; + Gtk::Widget* _hide_widget2 = nullptr; + Gtk::Allocation start_allocation1; + Gtk::Allocation start_allocationh; + Gtk::Allocation start_allocation2; + Gtk::Allocation allocation1; + Gtk::Allocation allocationh; + Gtk::Allocation allocation2; + + Glib::RefPtr<Gtk::GestureDrag> gesture; + // Signal callbacks + void on_drag_begin(double start_x, double start_y); + void on_drag_end(double offset_x, double offset_y); + void on_drag_update(double offset_x, double offset_y); + void on_drag_data(const Glib::RefPtr<Gdk::DragContext> context, int x, int y, + const Gtk::SelectionData &selection_data, guint info, guint time); + void on_prepend_drag_data(const Glib::RefPtr<Gdk::DragContext> context, int x, int y, + const Gtk::SelectionData &selection_data, guint info, guint time); + void on_append_drag_data(const Glib::RefPtr<Gdk::DragContext> context, int x, int y, + const Gtk::SelectionData &selection_data, guint info, guint time); + + // Others + Gtk::Widget *_empty_widget; // placeholder in an empty container + void add_empty_widget(); + void remove_empty_widget(); + std::vector<sigc::connection> _connections; +}; + +} // namespace Dialog +} // namespace UI +} // namespace Inkscape + +#endif // INKSCAPE_UI_DIALOG_MULTIPANED_H + +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 : |