1 files changed, 111 insertions, 0 deletions
diff --git a/src/ui/widget/color-palette.h b/src/ui/widget/color-palette.h
new file mode 100644
index 0000000..bc4c47f
--- /dev/null
+++ b/src/ui/widget/color-palette.h
@@ -0,0 +1,111 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** @file
+ * @brief Color palette widget
+ */
+/* Authors:
+ *   Michael Kowalski
+ *
+ * Copyright (C) 2021 Michael Kowalski
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef SEEN_COLOR_PALETTE_H
+#define SEEN_COLOR_PALETTE_H
+
+#include <gtkmm/bin.h>
+#include <gtkmm/builder.h>
+#include <gtkmm/button.h>
+#include <gtkmm/flowbox.h>
+#include <gtkmm/scrolledwindow.h>
+#include <gtkmm/menu.h>
+#include <vector>
+
+namespace Inkscape {
+namespace UI {
+namespace Widget {
+
+class ColorPalette : public Gtk::Bin {
+public:
+    ColorPalette();
+    ~ColorPalette() override;
+
+    struct rgb_t { double r; double g; double b; };
+    struct palette_t { Glib::ustring name; std::vector<rgb_t> colors; };
+
+    // set colors presented in a palette
+    void set_colors(const std::vector<Gtk::Widget*>& swatches);
+    // list of palettes to present in the menu
+    void set_palettes(const std::vector<palette_t>& palettes);
+    // enable compact mode (true) with mini-scroll buttons, or normal mode (false) with regular scrollbars
+    void set_compact(bool compact);
+
+    void set_tile_size(int size_px);
+    void set_tile_border(int border_px);
+    void set_rows(int rows);
+    void set_aspect(double aspect);
+    // show horizontal scrollbar when only 1 row is set
+    void enable_scrollbar(bool show);
+    // allow tile stretching (horizontally)
+    void enable_stretch(bool enable);
+
+    int get_tile_size() const;
+    int get_tile_border() const;
+    int get_rows() const;
+    double get_aspect() const;
+    bool is_scrollbar_enabled() const;
+    bool is_stretch_enabled() const;
+
+    void set_selected(const Glib::ustring& name);
+
+    sigc::signal<void, Glib::ustring>& get_palette_selected_signal();
+    sigc::signal<void>& get_settings_changed_signal();
+
+private:
+    void resize();
+    void set_up_scrolling();
+    void free();
+    void scroll(int dx, int dy, double snap, bool smooth);
+    void do_scroll(int dx, int dy);
+    static gboolean scroll_cb(gpointer self);
+    void _set_tile_size(int size_px);
+    void _set_tile_border(int border_px);
+    void _set_rows(int rows);
+    void _set_aspect(double aspect);
+    void _enable_scrollbar(bool show);
+    void _enable_stretch(bool enable);
+    static gboolean check_scrollbar(gpointer self);
+    void update_checkbox();
+    void update_stretch();
+    int get_tile_size(bool horz) const;
+    int get_tile_width() const;
+    int get_tile_height() const;
+    int get_palette_height() const;
+
+    Glib::RefPtr<Gtk::Builder> _builder;
+    Gtk::FlowBox& _flowbox;
+    Gtk::ScrolledWindow& _scroll;
+    Gtk::FlowBox& _scroll_btn;
+    Gtk::Button& _scroll_up;
+    Gtk::Button& _scroll_down;
+    Gtk::Button& _scroll_left;
+    Gtk::Button& _scroll_right;
+    Gtk::Menu& _menu;
+    int _size = 10;
+    int _border = 0;
+    int _rows = 1;
+    double _aspect = 0.0;
+    int _count = 1;
+    bool _compact = true;
+    sigc::signal<void, Glib::ustring> _signal_palette_selected;
+    sigc::signal<void> _signal_settings_changed;
+    bool _in_update = false;
+    guint _active_timeout = 0;
+    bool _force_scrollbar = false;
+    bool _stretch_tiles = false;
+    double _scroll_step = 0.0; // smooth scrolling step
+    double _scroll_final = 0.0; // smooth scroll final value
+};
+
+}}} // namespace
+
+#endif // SEEN_COLOR_PALETTE_H