Adding upstream version 1.2.2.upstream/1.2.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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 :