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/*
* Copyright 2008-2013 Steven Dalton
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file matrix_data_cursor.cc
* The definition file for the matrix_data_cursor class.
*/
/*
* David Gleich
* 22 November 2006
* Copyright, Stanford University
*/
#pragma once
#include <cusp/opengl/spy/gl_util.h>
namespace cusp
{
namespace opengl
{
namespace spy
{
/**
* The matrix_data_cursor class handles drawing a data_cursor on the
* screen. The cursor is a set of two lines identifying a row and
* a column of the matrix.
*/
class matrix_data_cursor
{
public:
matrix_data_cursor(int in_nrows, int in_ncols)
: nrows(in_nrows), ncols(in_ncols),
state(STATE_NONE),
cursor_x((float)in_nrows/2),
cursor_y((float)in_nrows/2)
{
color[0]=1.0f; color[1]=1.0f; color[2]=0.0f;
}
void set_matrix_size(int in_nrows, int in_ncols)
{
nrows = in_nrows;
ncols = in_ncols;
}
void draw()
{
int m = nrows;
int n = ncols;
int vx = (int)cursor_x;
int vy = (int)cursor_y;
glColor3f(color[0],color[1],color[2]);
glBegin(GL_LINES);
glVertex2f(-0.5f,(GLfloat)vy);
glVertex2f(n-0.5f,(GLfloat)vy);
glEnd();
glBegin(GL_LINES);
glVertex2f((GLfloat)vx,-0.5f);
glVertex2f((GLfloat)vx,(GLfloat)m-0.5f);
glEnd();
}
bool scaled_motion(float x, float y)
{
if (state == STATE_MOVING)
{
cursor_x += x;
cursor_y += y;
bound_cursor();
glutPostRedisplay();
return (true);
}
return (false);
}
bool mouse_click(int button, int button_state, int x, int y)
{
if (button_state == GLUT_UP)
{
state = STATE_NONE;
return (false);
}
if (button_state != GLUT_DOWN)
{
return (false);
}
// henceforth, we can assume that button_state == GLUT_DOWN
int mod_state = glutGetModifiers();
if ((button == GLUT_LEFT_BUTTON && mod_state == GLUT_ACTIVE_CTRL) ||
(button == GLUT_MIDDLE_BUTTON))
{
state = STATE_MOVING;
double wx,wy;
screen_to_world(x,y,&wx, &wy);
cursor_x = (float)(wx+0.5);
cursor_y = (float)(wy+0.5);
bound_cursor();
glutPostRedisplay();
return (true);
}
return (false);
}
int get_x()
{
return (int)cursor_x;
}
int get_y()
{
return (int)cursor_y;
}
void set_position(int x, int y) {
cursor_x = (float)x; cursor_y = (float)y;
bound_cursor();
glutPostRedisplay();
}
void set_color(float r, float g, float b) { color[0]=r; color[1]=g; color[2]=b; }
private:
/*int matrix_data_cursor_nrows;
int matrix_data_cursor_ncols;
int matrix_data_cursor_x;
int matrix_data_cursor_y;
enum {
MOUSE_DATA_CURSOR_STATE_MOVING,
MOUSE_DATA_CURSOR_NONE
} mouse_data_cursor_state;*/
int nrows;
int ncols;
float cursor_x;
float cursor_y;
enum {
STATE_MOVING,
STATE_NONE
} state;
void bound_cursor()
{
if(cursor_x < 0) cursor_x = 0;
if(cursor_y < 0) cursor_y = 0;
if(cursor_x > ncols-1) cursor_x = (float)(ncols-1);
if(cursor_y > nrows-1) cursor_y = (float)(nrows-1);
}
float color[3];
};
} // end spy
} // end opengl
} // end cusp
#include <cusp/opengl/spy/detail/matrix_data_cursor.inl>
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