1 files changed, 126 insertions, 0 deletions
diff --git a/src/ui/util.h b/src/ui/util.h
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--- /dev/null
+++ b/src/ui/util.h
@@ -0,0 +1,126 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Utility functions for UI
+ *
+ * Authors:
+ *   Tavmjong Bah
+ *   John Smith
+ *
+ * Copyright (C) 2013, 2018 Authors
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef UI_UTIL_SEEN
+#define UI_UTIL_SEEN
+
+#include <cstddef> // size_t
+#include <exception>
+
+#include <gdkmm/rgba.h>
+#include <gtkmm/cellrenderer.h>
+#include <gtkmm/enums.h>
+#include <gtkmm/stylecontext.h>
+#include <2geom/point.h>
+#include <2geom/rect.h>
+#include <2geom/affine.h>
+#include <gtkmm/widget.h>
+
+/*
+ * Use these errors when building from glade files for graceful
+ * fallbacks and prevent crashes from corrupt ui files.
+ */
+class UIBuilderError : public std::exception {};
+class UIFileUnavailable : public UIBuilderError {};
+class WidgetUnavailable : public UIBuilderError {};
+
+namespace Cairo {
+class Matrix;
+class ImageSurface;
+}
+
+namespace Glib {
+class ustring;
+}
+
+namespace Gtk {
+class Revealer;
+class Container;
+class Widget;
+}
+
+Gtk::Widget *get_widget_by_name(Gtk::Container *parent, const std::string &name);
+
+Glib::ustring ink_ellipsize_text (Glib::ustring const &src, size_t maxlen);
+void reveal_widget(Gtk::Widget *widget, bool show);
+
+// check if widget in a container is actually visible
+bool is_widget_effectively_visible(Gtk::Widget const *widget);
+
+namespace Inkscape::UI {
+
+void set_icon_sizes(Gtk::Widget* parent, int pixel_size);
+void set_icon_sizes(GtkWidget* parent, int pixel_size);
+
+/// Utility function to ensure correct sizing after adding child widgets.
+void resize_widget_children(Gtk::Widget *widget);
+
+void gui_warning(const std::string &msg, Gtk::Window * parent_window = nullptr);
+
+inline void widget_show(Gtk::Widget &widget, bool show)
+{
+    show ? widget.show() : widget.hide();
+}
+
+/// Translate cell renderer state to style flags.
+Gtk::StateFlags cell_flags_to_state_flags(Gtk::CellRendererState state);
+
+} // namespace Inkscape::UI
+
+// Mix two RGBA colors using simple linear interpolation:
+//  0 -> only a, 1 -> only b, x in 0..1 -> (1 - x)*a + x*b
+Gdk::RGBA mix_colors(const Gdk::RGBA& a, const Gdk::RGBA& b, float ratio);
+
+// Create the same color, but with a different opacity (alpha)
+Gdk::RGBA change_alpha(const Gdk::RGBA& color, double new_alpha);
+
+// Get the background-color style property for a given StyleContext
+Gdk::RGBA get_context_color(const Glib::RefPtr<Gtk::StyleContext> &context,
+                            const gchar *property,
+                            Gtk::StateFlags state = static_cast<Gtk::StateFlags>(0));
+Gdk::RGBA get_background_color(const Glib::RefPtr<Gtk::StyleContext> &context,
+                               Gtk::StateFlags state = static_cast<Gtk::StateFlags>(0));
+
+Geom::IntRect cairo_to_geom(const Cairo::RectangleInt &rect);
+Cairo::RectangleInt geom_to_cairo(const Geom::IntRect &rect);
+Cairo::Matrix geom_to_cairo(const Geom::Affine &affine);
+Geom::IntPoint dimensions(const Cairo::RefPtr<Cairo::ImageSurface> &surface);
+Geom::IntPoint dimensions(const Gdk::Rectangle &allocation);
+
+// create a gradient with multiple steps to approximate profile described by given cubic spline
+Cairo::RefPtr<Cairo::LinearGradient> create_cubic_gradient(
+    Geom::Rect rect,
+    const Gdk::RGBA& from,
+    const Gdk::RGBA& to,
+    Geom::Point ctrl1,
+    Geom::Point ctrl2,
+    Geom::Point p0 = Geom::Point(0, 0),
+    Geom::Point p1 = Geom::Point(1, 1),
+    int steps = 8
+);
+
+void set_dark_tittlebar(Glib::RefPtr<Gdk::Window> win, bool is_dark);
+// convert Gdk::RGBA into 32-bit rrggbbaa color, optionally replacing alpha, if specified
+uint32_t conv_gdk_color_to_rgba(const Gdk::RGBA& color, double replace_alpha = -1);
+
+#endif
+
+/*
+  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 :