1 files changed, 169 insertions, 0 deletions
diff --git a/src/ui/widget/highlight-picker.cpp b/src/ui/widget/highlight-picker.cpp
new file mode 100644
index 0000000..f35e405
--- /dev/null
+++ b/src/ui/widget/highlight-picker.cpp
@@ -0,0 +1,169 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Authors:
+ *   Theodore Janeczko
+ *
+ * Copyright (C) Theodore Janeczko 2012 <flutterguy317@gmail.com>
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <glibmm.h>
+#include <gtkmm/icontheme.h>
+
+#include "display/cairo-utils.h"
+
+#include "highlight-picker.h"
+
+namespace Inkscape {
+namespace UI {
+namespace Widget {
+
+HighlightPicker::HighlightPicker() :
+    Glib::ObjectBase(typeid(HighlightPicker)),
+    Gtk::CellRendererPixbuf(),
+    _property_active(*this, "active", 0)
+{
+    
+    property_mode() = Gtk::CELL_RENDERER_MODE_ACTIVATABLE;
+}
+
+HighlightPicker::~HighlightPicker()
+= default;
+
+void HighlightPicker::get_preferred_height_vfunc(Gtk::Widget& widget,
+                                              int& min_h,
+                                              int& nat_h) const
+{
+    Gtk::CellRendererPixbuf::get_preferred_height_vfunc(widget, min_h, nat_h);
+
+    if (min_h) {
+        min_h += (min_h) >> 1;
+    }
+    
+    if (nat_h) {
+        nat_h += (nat_h) >> 1;
+    }
+}
+
+void HighlightPicker::get_preferred_width_vfunc(Gtk::Widget& widget,
+                                             int& min_w,
+                                             int& nat_w) const
+{
+    Gtk::CellRendererPixbuf::get_preferred_width_vfunc(widget, min_w, nat_w);
+
+    if (min_w) {
+        min_w += (min_w) >> 1;
+    }
+    
+    if (nat_w) {
+        nat_w += (nat_w) >> 1;
+    }
+}
+
+void HighlightPicker::render_vfunc( const Cairo::RefPtr<Cairo::Context>& cr,
+                                 Gtk::Widget& widget,
+                                 const Gdk::Rectangle& background_area,
+                                 const Gdk::Rectangle& cell_area,
+                                 Gtk::CellRendererState flags )
+{
+    GdkRectangle carea;
+
+    cairo_surface_t *s = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 10, 20);
+    cairo_t *ct = cairo_create(s);
+
+    /* Transparent area */
+    carea.x = 0;
+    carea.y = 0;
+    carea.width = 10;
+    carea.height = 20;
+
+    cairo_pattern_t *checkers = ink_cairo_pattern_create_checkerboard();
+
+    cairo_rectangle(ct, carea.x, carea.y, carea.width, carea.height / 2);
+    cairo_set_source(ct, checkers);
+    cairo_fill_preserve(ct);
+    ink_cairo_set_source_rgba32(ct, _property_active.get_value());
+    cairo_fill(ct);
+
+    cairo_pattern_destroy(checkers);
+
+    cairo_rectangle(ct, carea.x, carea.y + carea.height / 2, carea.width, carea.height / 2);
+    ink_cairo_set_source_rgba32(ct, _property_active.get_value() | 0x000000ff);
+    cairo_fill(ct);
+
+    cairo_rectangle(ct, carea.x, carea.y, carea.width, carea.height);
+    ink_cairo_set_source_rgba32(ct, 0x333333ff);
+    cairo_set_line_width(ct, 2);
+    cairo_stroke(ct);
+
+    cairo_destroy(ct);
+    cairo_surface_flush(s);
+    
+    GdkPixbuf* pixbuf = gdk_pixbuf_new_from_data( cairo_image_surface_get_data(s),
+                                               GDK_COLORSPACE_RGB, TRUE, 8,
+                                               10, 20, cairo_image_surface_get_stride(s),
+                                               ink_cairo_pixbuf_cleanup, s);
+    convert_pixbuf_argb32_to_normal(pixbuf);
+    
+    property_pixbuf() = Glib::wrap(pixbuf);
+    Gtk::CellRendererPixbuf::render_vfunc( cr, widget, background_area, cell_area, flags );
+}
+
+bool HighlightPicker::activate_vfunc(GdkEvent* /*event*/,
+                                     Gtk::Widget& /*widget*/,
+                                     const Glib::ustring& /*path*/,
+                                     const Gdk::Rectangle& /*background_area*/,
+                                     const Gdk::Rectangle& /*cell_area*/,
+                                     Gtk::CellRendererState /*flags*/)
+{    
+    return false;
+}
+
+} // namespace Widget
+} // namespace UI
+} // namespace Inkscape
+
+//should be okay to put this here
+/**
+ * Converts GdkPixbuf's data to premultiplied ARGB.
+ * This function will convert a GdkPixbuf in place into Cairo's native pixel format.
+ * Note that this is a hack intended to save memory. When the pixbuf is in Cairo's format,
+ * using it with GTK will result in corrupted drawings.
+ */
+void
+convert_pixbuf_normal_to_argb32(GdkPixbuf *pb)
+{
+    convert_pixels_pixbuf_to_argb32(
+        gdk_pixbuf_get_pixels(pb),
+        gdk_pixbuf_get_width(pb),
+        gdk_pixbuf_get_height(pb),
+        gdk_pixbuf_get_rowstride(pb));
+}
+
+/**
+ * Converts GdkPixbuf's data back to its native format.
+ * Once this is done, the pixbuf can be used with GTK again.
+ */
+void
+convert_pixbuf_argb32_to_normal(GdkPixbuf *pb)
+{
+    convert_pixels_argb32_to_pixbuf(
+        gdk_pixbuf_get_pixels(pb),
+        gdk_pixbuf_get_width(pb),
+        gdk_pixbuf_get_height(pb),
+        gdk_pixbuf_get_rowstride(pb));
+}
+
+/*
+  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 :
+
+