84 lines
2.0 KiB
C++
84 lines
2.0 KiB
C++
/*
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* Copyright 2019 University of Toronto
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Authors: Mario Badr, Sameh Attia and Tanner Young-Schultz
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*/
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#ifndef EZGL_CONTROL_HPP
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#define EZGL_CONTROL_HPP
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#include "ezgl/point.hpp"
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#include "ezgl/rectangle.hpp"
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namespace ezgl {
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/**** Functions to manipulate what is visible on the screen; used by ezgl's predefined buttons. ****/
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/**** Application code does not have to ever call these functions. ****/
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class canvas;
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/**
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* Zoom in on the center of the currently visible world.
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*/
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void zoom_in(canvas *cnv, double zoom_factor);
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/**
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* Zoom out from the center of the currently visible world.
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*/
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void zoom_out(canvas *cnv, double zoom_factor);
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/**
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* Zoom in on a specific point in the GTK widget.
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*/
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void zoom_in(canvas *cnv, point2d zoom_point, double zoom_factor);
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/**
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* Zoom out from a specific point in GTK widget.
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*/
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void zoom_out(canvas *cnv, point2d zoom_point, double zoom_factor);
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/**
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* Zoom in or out to fit an exact region of the world.
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*/
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void zoom_fit(canvas *cnv, rectangle region);
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/**
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* Translate by delta x and delta y (dx, dy)
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*/
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void translate(canvas *cnv, double dx, double dy);
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/**
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* Translate up
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*/
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void translate_up(canvas *cnv, double translate_factor);
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/**
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* Translate down
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*/
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void translate_down(canvas *cnv, double translate_factor);
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/**
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* Translate left
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*/
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void translate_left(canvas *cnv, double translate_factor);
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/**
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* Translate right
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*/
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void translate_right(canvas *cnv, double translate_factor);
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}
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#endif //EZGL_CONTROL_HPP
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