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* rectangular selector gestures, enabling select, deselect and toggle behaviors

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This commit is contained in:
Garux
2018-07-23 16:25:32 +03:00
parent bbc691a07b
commit 5c48131eba
7 changed files with 117 additions and 124 deletions
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105
libs/gtkutil/xorrectangle.h
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@@ -22,66 +22,32 @@
#if !defined ( INCLUDED_XORRECTANGLE_H )
#define INCLUDED_XORRECTANGLE_H
#include <gtk/gtkwidget.h>
#include "math/vector.h"
#include "gtkutil/glwidget.h"
#include "rect_t.h"
#include "igl.h"
#include <gtk/gtkglwidget.h>
//#include "stream/stringstream.h"
class rectangle_t
{
public:
rectangle_t()
: x( 0 ), y( 0 ), w( 0 ), h( 0 )
{}
rectangle_t( float _x, float _y, float _w, float _h )
: x( _x ), y( _y ), w( _w ), h( _h )
{}
float x;
float y;
float w;
float h;
};
struct Coord2D
{
float x, y;
Coord2D( float _x, float _y )
: x( _x ), y( _y ){
}
};
inline Coord2D coord2d_device2screen( const Coord2D& coord, unsigned int width, unsigned int height ){
return Coord2D( ( ( coord.x + 1.0f ) * 0.5f ) * width, ( ( coord.y + 1.0f ) * 0.5f ) * height );
}
inline rectangle_t rectangle_from_area( const float min[2], const float max[2], unsigned int width, unsigned int height ){
Coord2D botleft( coord2d_device2screen( Coord2D( min[0], min[1] ), width, height ) );
Coord2D topright( coord2d_device2screen( Coord2D( max[0], max[1] ), width, height ) );
return rectangle_t( botleft.x, botleft.y, topright.x - botleft.x, topright.y - botleft.y );
}
class XORRectangle {
void draw( const rect_t& rect, const GLenum mode ) const{
glBegin( mode );
glVertex2f( rect.min[0], rect.max[1] );
glVertex2f( rect.max[0], rect.max[1] );
glVertex2f( rect.max[0], rect.min[1] );
glVertex2f( rect.min[0], rect.min[1] );
glEnd();
}
public:
XORRectangle() {
}
~XORRectangle() {
}
void set( rectangle_t rectangle, int width, int height ) {
if( rectangle.w != 0.f && rectangle.h != 0.f ) {
void set( rect_t rect, int width, int height ) {
if( rect.max[0] - rect.min[0] != 0.f && rect.max[1] - rect.min[1] != 0.f ) {
GlobalOpenGL_debugAssertNoErrors();
glViewport( 0, 0, width, height );
// set up viewpoint
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
glOrtho( 0, width, 0, height, -100, 100 );
glOrtho( -1, 1, -1, 1, -100, 100 );
glMatrixMode( GL_MODELVIEW );
glLoadIdentity();
@@ -95,30 +61,41 @@ public:
}
glEnable( GL_BLEND );
/* additive to handle dark background */
glBlendFunc( GL_ONE, GL_ONE );
//glColor4f( 0.94902f / 5.f, 0.396078f / 5.f, 0.133333f / 5.f, .2f );
glColor3f( 1.f / 10.f, .5f / 10.f, 0.f );
glBegin( GL_QUADS );
glVertex2f( rectangle.x, rectangle.y + rectangle.h );
glVertex2f( rectangle.x + rectangle.w, rectangle.y + rectangle.h );
glVertex2f( rectangle.x + rectangle.w, rectangle.y );
glVertex2f( rectangle.x, rectangle.y );
glEnd();
const float r = 10.f;
switch ( rect.modifier )
{
case rect_t::eSelect: glColor3f( 1.f / r, .5f / r, 0.f ); break;
case rect_t::eDeselect: glColor3f( 0.f, 0.f, 1.f / r ); break;
case rect_t::eToggle: glColor3f( 1.f / r, 1.f / r, 1.f / r ); break;
}
draw( rect, GL_QUADS );
/* filter to handle bright background */
glBlendFunc( GL_ZERO, GL_SRC_COLOR );
switch ( rect.modifier )
{
case rect_t::eSelect: glColor3f( 1.f, .9f, 0.7f ); break;
case rect_t::eDeselect: glColor3f( 0.8f, 0.8f, 1.f ); break;
case rect_t::eToggle: glColor3f( .8f, .8f, .8f ); break;
}
draw( rect, GL_QUADS );
/* alpha blend on top */
glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
const float a = .3f;
switch ( rect.modifier )
{
case rect_t::eSelect: glColor4f( 1.f, .5f, 0.f, a ); break;
case rect_t::eDeselect: glColor4f( 0.f, 0.f, 1.f, a ); break;
case rect_t::eToggle: glColor4f( 1.f, 1.f, 1.f, a ); break;
}
draw( rect, GL_QUADS );
glDisable( GL_BLEND );
glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
glLineWidth( 1 );
//glColor3f( 0.94902f, 0.396078f, 0.133333f );
glColor3f( 1.f, .5f, 0.f );
glBegin( GL_LINE_LOOP );
glVertex2f( rectangle.x, rectangle.y + rectangle.h );
glVertex2f( rectangle.x + rectangle.w, rectangle.y + rectangle.h );
glVertex2f( rectangle.x + rectangle.w, rectangle.y );
glVertex2f( rectangle.x, rectangle.y );
glEnd();
draw( rect, GL_LINE_LOOP );
GlobalOpenGL_debugAssertNoErrors();
}