60 lines
2.2 KiB
C++
60 lines
2.2 KiB
C++
/*
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Copyright (C) 2021 Paul Davis
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Author: Ben Loftis <ben@harrisonconsoles.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef _gtk_ardour_fitted_canvas_widget_h_
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#define _gtk_ardour_fitted_canvas_widget_h_
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#include <canvas/canvas.h>
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#include <gtkmm/layout.h>
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/* FittedCanvasWidget has these properties:
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* it is provided a 'nominal size' on construction, which it will request of gtk
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* if asked, will resize itself when the user gui/font scale changes
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* it 'fits' the Item that was first attached to Root (presumably the top-level widget or container)
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* the fitted Item will be explicitly resized to fit when the canvas size is allocated
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* the fitted Item may be a container; it should allocate child positions during size_allocate()
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*/
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class FittedCanvasWidget : public ArdourCanvas::GtkCanvas
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{
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public:
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/* per gtk convention you may use -1 for width OR height if you don't care about that dimension */
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FittedCanvasWidget (float nominal_width, float nominal_height, bool follow_scale = true);
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/* call if the root item's first child is changed, to force a size-allocate on it */
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void repeat_size_allocation ();
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/* always returns the nominal size, regardless of children */
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void on_size_request (Gtk::Requisition*);
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void on_size_allocate (Gtk::Allocation&);
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virtual float nominal_width() {return _nominal_width;}
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virtual float nominal_height() {return _nominal_height;}
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private:
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ArdourCanvas::Rect _allocation;
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float _nominal_width;
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float _nominal_height;
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bool _follow_scale;
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};
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#endif // _gtk_ardour_fitted_canvas_widget_h_
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