1 files changed, 99 insertions, 0 deletions
diff --git a/src/ui/widget/export-preview.h b/src/ui/widget/export-preview.h
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+++ b/src/ui/widget/export-preview.h
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Authors:
+ *   Anshudhar Kumar Singh <anshudhar2001@gmail.com>
+ *
+ * Copyright (C) 2021 Authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef INKSCAPE_UI_WIDGET_EXPORT_PREVIEW_H
+#define INKSCAPE_UI_WIDGET_EXPORT_PREVIEW_H
+
+#include <cstdint>
+#include <2geom/rect.h>
+#include <gtkmm.h>
+#include "display/drawing.h"
+#include "helper/auto-connection.h"
+#include "async/channel.h"
+
+class SPDocument;
+class SPObject;
+class SPItem;
+
+namespace Inkscape {
+class Drawing;
+
+namespace UI {
+namespace Dialog {
+class ExportPreview;
+
+class PreviewDrawing
+{
+public:
+    PreviewDrawing(SPDocument *document);
+    ~PreviewDrawing();
+
+    bool render(ExportPreview *widget, uint32_t bg, SPItem *item, unsigned size, Geom::OptRect const &dboxIn);
+    void set_shown_items(std::vector<SPItem*> &&list = {});
+
+private:
+    void destruct();
+    void construct();
+
+    SPDocument *_document = nullptr;
+    std::shared_ptr<Inkscape::Drawing> _drawing;
+    unsigned _visionkey = 0;
+    bool _to_destruct = false;
+
+    std::vector<SPItem*> _shown_items;
+    Inkscape::auto_connection _construct_idle;
+};
+
+class ExportPreview final : public Gtk::Image
+{
+public:
+    ExportPreview() = default;
+    ExportPreview(BaseObjectType *cobj, Glib::RefPtr<Gtk::Builder> const &) : Gtk::Image(cobj) {}
+    ~ExportPreview() override;
+
+    void setDrawing(std::shared_ptr<PreviewDrawing> drawing);
+    void setItem(SPItem *item);
+    void setBox(Geom::Rect const &bbox);
+    void queueRefresh();
+    void resetPixels(bool new_size = false);
+    void setSize(int newSize);
+    void setPreview(Cairo::RefPtr<Cairo::ImageSurface>);
+    void setBackgroundColor(uint32_t bg_color);
+
+    static std::shared_ptr<Inkscape::Drawing> makeDrawing(SPDocument *doc);
+
+private:
+    int size = 128; // size of preview image
+    sigc::connection refresh_conn;
+
+    SPItem *_item = nullptr;
+    Geom::OptRect _dbox;
+
+    std::shared_ptr<PreviewDrawing> _drawing;
+    uint32_t _bg_color = 0;
+
+    Inkscape::auto_connection _render_idle;
+};
+
+} // namespace Dialog
+} // namespace UI
+} // namespace Inkscape
+
+#endif // INKSCAPE_UI_WIDGET_EXPORT_PREVIEW_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 :