84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
/* -*- Mode: C ; c-basic-offset: 2 -*- */
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/*
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* LADI Session Handler (ladish)
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*
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* Copyright (C) 2010 Nedko Arnaudov <nedko@arnaudov.name>
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*
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**************************************************************************
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* This file contains the canvas zoom related code
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**************************************************************************
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*
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* LADI Session Handler 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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*
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* LADI Session Handler 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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*
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* You should have received a copy of the GNU General Public License
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* along with LADI Session Handler. If not, see <http://www.gnu.org/licenses/>
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* or write to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "zoom.h"
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#include "canvas.h"
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#include "graph_view.h"
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#define ZOOM_CHANGE 1.1
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void zoom_100(void)
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{
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canvas_handle canvas;
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log_info("zoom 100%% request");
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canvas = get_current_canvas();
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if (canvas != NULL)
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{
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canvas_set_zoom(canvas, 1.0);
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}
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}
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void zoom_fit(void)
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{
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canvas_handle canvas;
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log_info("zoom fit request");
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canvas = get_current_canvas();
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if (canvas != NULL)
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{
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canvas_set_zoom_fit(canvas);
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}
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}
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void zoom_in(void)
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{
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canvas_handle canvas;
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log_info("zoom in request");
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canvas = get_current_canvas();
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if (canvas != NULL)
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{
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canvas_set_zoom(canvas, canvas_get_zoom(canvas) * ZOOM_CHANGE);
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}
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}
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void zoom_out(void)
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{
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canvas_handle canvas;
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log_info("zoom out request");
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canvas = get_current_canvas();
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if (canvas != NULL)
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{
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canvas_set_zoom(canvas, canvas_get_zoom(canvas) / ZOOM_CHANGE);
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}
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}
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