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/*
* Copyright (C) 2002-2004 by Jonathan Naylor G4KLX
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "LevelGraph.h"
BEGIN_EVENT_TABLE(CLevelGraph, wxWindow)
EVT_PAINT(CLevelGraph::onPaint)
END_EVENT_TABLE()
const int BAR_COUNT = 25;
const int RED_COUNT = 20;
CLevelGraph::CLevelGraph(wxWindow* parent, int id, const wxPoint& pos, const wxSize& size, long style, const wxString& name) :
wxWindow(parent, id, pos, size, style, name),
m_bitmap(NULL),
m_height(0),
m_width(0)
{
m_height = size.GetHeight();
m_width = size.GetWidth();
if (m_height == -1)
m_height = 125;
if (m_width == -1)
m_width = 25;
m_bitmap = new wxBitmap(m_width, m_height);
clearGraph();
}
CLevelGraph::~CLevelGraph()
{
delete m_bitmap;
}
void CLevelGraph::addData(double level)
{
clearGraph();
wxMemoryDC memoryDC;
memoryDC.SelectObject(*m_bitmap);
memoryDC.BeginDrawing();
if (level < 0.0) level = -level;
int n = int(level * double(BAR_COUNT) + 0.5);
if (n > BAR_COUNT) n = BAR_COUNT;
for (int j = 0; j < n; j++) {
int y = m_height - j * (m_height / BAR_COUNT) - 7;
if (j >= RED_COUNT) {
memoryDC.SetPen(*wxRED_PEN);
memoryDC.SetBrush(*wxRED_BRUSH);
} else {
memoryDC.SetPen(*wxGREEN_PEN);
memoryDC.SetBrush(*wxGREEN_BRUSH);
}
memoryDC.DrawRectangle(2, y, m_width - 4, m_height / BAR_COUNT - 1);
}
memoryDC.EndDrawing();
memoryDC.SelectObject(wxNullBitmap);
wxClientDC clientDC(this);
show(clientDC);
}
void CLevelGraph::onPaint(wxPaintEvent& event)
{
wxPaintDC dc(this);
show(dc);
}
void CLevelGraph::show(wxDC& dc)
{
dc.BeginDrawing();
dc.DrawBitmap(*m_bitmap, 0, 0, false);
dc.EndDrawing();
}
void CLevelGraph::clearGraph()
{
// Flood the graph area with black to start with
wxMemoryDC dc;
dc.SelectObject(*m_bitmap);
dc.BeginDrawing();
dc.SetBackground(*wxBLACK_BRUSH);
dc.Clear();
for (int j = 0; j < BAR_COUNT; j++) {
int y = m_height - j * (m_height / BAR_COUNT) - 7;
dc.SetPen(*wxGREY_PEN);
dc.SetBrush(*wxGREY_BRUSH);
dc.DrawRectangle(2, y, m_width - 4, m_height / BAR_COUNT - 1);
}
dc.EndDrawing();
}
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