Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
//===========================================================================//
#include "matsys_controls/curveeditorpanel.h"
#include "matsys_controls/matsyscontrols.h"
#include "tier1/KeyValues.h"
#include "vgui/ISurface.h"
#include "vgui/IInput.h"
#include "vgui/MouseCode.h"
using namespace vgui;
//-----------------------------------------------------------------------------
// constructor, destructor
//-----------------------------------------------------------------------------
CCurveEditorPanel::CCurveEditorPanel( vgui::Panel *pParent, const char *pName ) : BaseClass( pParent, pName )
{
m_nSelectedPoint = -1;
SetMouseInputEnabled( true );
SetKeyBoardInputEnabled( true );
m_nHighlightedPoint = -1;
}
CCurveEditorPanel::~CCurveEditorPanel()
{
}
//-----------------------------------------------------------------------------
// Converts screen location to normalized values
//-----------------------------------------------------------------------------
void CCurveEditorPanel::ScreenToValue( int x, int y, float *pIn, float *pOut )
{
int w, h;
GetSize( w, h );
*pIn = (float)x / (w-1);
*pOut = 1.0f - ((float)y / (h-1));
}
void CCurveEditorPanel::ValueToScreen( float flIn, float flOut, int *x, int *y )
{
int w, h;
GetSize( w, h );
*x = (int)(flIn * (w-1) + 0.5f);
*y = (h-1) - (int)(flOut * (h-1) + 0.5f);
}
//-----------------------------------------------------------------------------
// Handle input
//-----------------------------------------------------------------------------
void CCurveEditorPanel::OnMousePressed( vgui::MouseCode code )
{
BaseClass::OnMousePressed( code );
int x, y;
input()->GetCursorPos( x, y );
ScreenToLocal( x, y );
if ( code == MOUSE_LEFT )
{
int w, h;
GetSize( w, h );
float flIn, flOut;
ScreenToValue( x, y, &flIn, &flOut );
float flTolerance = 5.0f / (w-1); // +/- 3 pixels to select the point
m_nSelectedPoint = FindOrAddControlPoint( flIn, flTolerance, flOut );
}
}
void CCurveEditorPanel::OnMouseReleased( vgui::MouseCode code )
{
BaseClass::OnMouseReleased( code );
if ( code == MOUSE_LEFT )
{
m_nSelectedPoint = -1;
}
}
void CCurveEditorPanel::OnCursorMoved( int x, int y )
{
BaseClass::OnCursorMoved( x, y );
float flIn, flOut;
ScreenToValue( x, y, &flIn, &flOut );
int w, h;
GetSize( w, h );
float flTolerance = 5.0f / (w-1); // +/- 3 pixels to select the point
m_nHighlightedPoint = FindControlPoint( flIn, flTolerance );
if ( m_nSelectedPoint < 0 )
return;
m_nSelectedPoint = ModifyControlPoint( m_nSelectedPoint, flIn, flOut );
}
//-----------------------------------------------------------------------------
// Handles keypresses
//-----------------------------------------------------------------------------
void CCurveEditorPanel::OnKeyCodePressed( vgui::KeyCode code )
{
BaseClass::OnKeyCodePressed( code );
if ( m_nSelectedPoint >= 0 )
{
RemoveControlPoint( m_nSelectedPoint );
m_nSelectedPoint = -1;
}
}
//-----------------------------------------------------------------------------
// This paints the grid behind the curves
//-----------------------------------------------------------------------------
void CCurveEditorPanel::PaintBackground( void )
{
int w, h;
GetSize( w, h );
vgui::surface()->DrawSetColor( 255, 255, 255, 255 );
vgui::surface()->DrawFilledRect( 0, 0, w, h );
vgui::surface()->DrawSetColor( 128, 128, 128, 255 );
vgui::surface()->DrawLine( 0, h/4, w, h/4 );
vgui::surface()->DrawLine( 0, h/2, w, h/2 );
vgui::surface()->DrawLine( 0, 3*h/4, w, 3*h/4 );
vgui::surface()->DrawLine( w/4, 0, w/4, h );
vgui::surface()->DrawLine( w/2, 0, w/2, h );
vgui::surface()->DrawLine( 3*w/4, 0, 3*w/4, h );
vgui::surface()->DrawSetColor( 0, 0, 0, 255 );
vgui::surface()->DrawLine( 0, 0, w, 0 );
vgui::surface()->DrawLine( w, 0, w, h );
vgui::surface()->DrawLine( w, h, 0, h );
vgui::surface()->DrawLine( 0, h, 0, 0 );
}
//-----------------------------------------------------------------------------
// Sets the color curves operation to edit
//-----------------------------------------------------------------------------
void CCurveEditorPanel::Paint( void )
{
int w, h;
GetSize( w, h );
int x0 = 0, y0 = 0;
// FIXME: Add method to draw multiple lines DrawPolyLine connects the 1st and last points... bleah
vgui::surface()->DrawSetColor( 0, 0, 0, 255 );
for ( int i = 0; i < w; ++i )
{
float flIn = (float)i / (w-1);
float flOut = GetValue( flIn );
int x = i;
int y = (h-1) - (int)(flOut * (h-1) + 0.5f);
y = clamp( y, 0, h-1 );
if ( i != 0 )
{
vgui::surface()->DrawLine( x0, y0, x, y );
}
x0 = x; y0 = y;
}
// This will paint the control points
// The currently selected one will be painted red and filled.
for ( int i = ControlPointCount(); --i >= 0; )
{
float flIn, flOut;
GetControlPoint( i, &flIn, &flOut );
int cx, cy;
ValueToScreen( flIn, flOut, &cx, &cy );
if ( (i == m_nSelectedPoint) || ((m_nSelectedPoint == -1) && (i == m_nHighlightedPoint)) )
{
vgui::surface()->DrawSetColor( 255, 0, 0, 255 );
vgui::surface()->DrawFilledRect( cx-3, cy-3, cx+3, cy+3 );
}
else
{
vgui::surface()->DrawSetColor( 0, 0, 0, 255 );
vgui::surface()->DrawOutlinedRect( cx-3, cy-3, cx+3, cy+3 );
}
}
}