rainmeter-studio/Library/MeterLine.cpp

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/*
Copyright (C) 2001 Kimmo Pekkola
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
#include "StdAfx.h"
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#include "MeterLine.h"
#include "Measure.h"
#include "Error.h"
using namespace Gdiplus;
/*
** The constructor
**
*/
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CMeterLine::CMeterLine(CMeterWindow* meterWindow, const WCHAR* name) : CMeter(meterWindow, name),
m_Autoscale(false),
m_HorizontalLines(false),
m_Flip(false),
m_LineWidth(1.0),
m_HorizontalColor(Color::Black),
m_CurrentPos()
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{
}
/*
** The destructor
**
*/
CMeterLine::~CMeterLine()
{
}
/*
** create the buffer for the lines
**
*/
void CMeterLine::Initialize()
{
CMeter::Initialize();
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size_t colorsSize = m_Colors.size();
size_t allValuesSize = m_AllValues.size();
size_t num = (allValuesSize > 0) ? m_AllValues[0].size() : 0;
if (colorsSize != allValuesSize)
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{
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if (colorsSize > allValuesSize)
{
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for (size_t i = allValuesSize; i < colorsSize; ++i)
{
m_AllValues.push_back(std::vector<double>());
if (m_W > 0)
{
m_AllValues.back().assign(m_W, 0.0);
}
}
}
else
{
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m_AllValues.resize(colorsSize);
}
}
if (m_W < 0 || num != (size_t)m_W)
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{
if (m_CurrentPos >= m_W) m_CurrentPos = 0;
num = (m_W < 0) ? 0 : m_W;
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for (size_t i = 0; i < allValuesSize; ++i)
{
if (num != m_AllValues[i].size())
{
m_AllValues[i].resize(num, 0.0);
}
}
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}
}
/*
** Read the meter-specific configs from the ini-file.
**
*/
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void CMeterLine::ReadConfig(CConfigParser& parser, const WCHAR* section)
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{
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WCHAR tmpName[64];
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// Store the current number of lines so we know if the buffer needs to be updated
int oldLineCount = (int)m_Colors.size();
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int oldW = m_W;
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// Read common configs
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CMeter::ReadConfig(parser, section);
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int lineCount = parser.ReadInt(section, L"LineCount", 1);
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m_Colors.clear();
m_ScaleValues.clear();
for (int i = 0; i < lineCount; ++i)
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{
if (i == 0)
{
wcsncpy_s(tmpName, L"LineColor", _TRUNCATE);
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}
else
{
_snwprintf_s(tmpName, _TRUNCATE, L"LineColor%i", i + 1);
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}
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m_Colors.push_back(parser.ReadColor(section, tmpName, Color::White));
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if (i == 0)
{
wcsncpy_s(tmpName, L"Scale", _TRUNCATE);
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}
else
{
_snwprintf_s(tmpName, _TRUNCATE, L"Scale%i", i + 1);
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}
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m_ScaleValues.push_back(parser.ReadFloat(section, tmpName, 1.0));
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if (!m_Initialized && !m_MeasureName.empty())
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{
if (i != 0)
{
_snwprintf_s(tmpName, _TRUNCATE, L"MeasureName%i", i + 1);
m_MeasureNames.push_back(parser.ReadString(section, tmpName, L""));
}
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}
}
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m_Flip = 0!=parser.ReadInt(section, L"Flip", 0);
m_Autoscale = 0!=parser.ReadInt(section, L"AutoScale", 0);
m_LineWidth = parser.ReadFloat(section, L"LineWidth", 1.0);
m_HorizontalLines = 0!=parser.ReadInt(section, L"HorizontalLines", 0);
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ARGB color = parser.ReadColor(section, L"HorizontalColor", Color::Black); // This is left here for backwards compatibility
m_HorizontalColor = parser.ReadColor(section, L"HorizontalLineColor", color); // This is what it should be
if (m_Initialized &&
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(oldLineCount != lineCount ||
oldW != m_W))
{
Initialize();
}
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}
/*
** Updates the value(s) from the measures.
**
*/
bool CMeterLine::Update()
{
if (CMeter::Update() && m_Measure)
{
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if (m_W > 0)
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{
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// Collect the values
if (!m_Measure->IsDisabled())
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{
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double value = m_Measure->GetValue();
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m_AllValues[0][m_CurrentPos] = value;
}
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int counter = 1;
std::vector<CMeasure*>::const_iterator i = m_Measures.begin();
for ( ; i != m_Measures.end(); ++i)
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{
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double value = (*i)->GetValue();
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m_AllValues[counter][m_CurrentPos] = value;
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++counter;
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}
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++m_CurrentPos;
if (m_CurrentPos >= m_W) m_CurrentPos = 0;
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}
return true;
}
return false;
}
/*
** Draws the meter on the double buffer
**
*/
bool CMeterLine::Draw(Graphics& graphics)
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{
if (!CMeter::Draw(graphics) || m_W <= 0) return false;
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double maxValue = 0.0;
int counter = 0;
// Find the maximum value
if (m_Autoscale)
{
double newValue = 0;
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std::vector< std::vector<double> >::const_iterator i = m_AllValues.begin();
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counter = 0;
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for (; i != m_AllValues.end(); ++i)
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{
double scale = m_ScaleValues[counter];
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std::vector<double>::const_iterator j = (*i).begin();
for (; j != (*i).end(); ++j)
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{
double val = (*j) * scale;
newValue = max(newValue, val);
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}
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++counter;
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}
// Scale the value up to nearest power of 2
if (newValue > DBL_MAX / 2.0)
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{
maxValue = DBL_MAX;
}
else
{
maxValue = 2.0;
while (maxValue < newValue)
{
maxValue *= 2.0;
}
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}
}
else
{
if (m_Measure)
{
maxValue = m_Measure->GetMaxValue();
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std::vector<CMeasure*>::const_iterator i = m_Measures.begin();
for (; i != m_Measures.end(); ++i)
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{
double val = (*i)->GetMaxValue();
maxValue = max(maxValue, val);
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}
}
if (maxValue == 0.0)
{
maxValue = 1.0;
}
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}
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int x = GetX();
int y = GetY();
// Draw the horizontal lines
if (m_HorizontalLines)
{
// Calc the max number of lines we should draw
int maxLines = m_H / 4; // one line per 4 pixels is max
int numOfLines;
// Check the highest power of 2 that fits in maxLines
int power = 2;
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while (power < maxLines)
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{
power *= 2;
}
numOfLines = ((int)maxValue % power) + 1;
Pen pen(m_HorizontalColor);
REAL Y;
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for (int j = 0; j < numOfLines; ++j)
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{
Y = (REAL)((j + 1) * m_H / (numOfLines + 1));
Y = y + m_H - Y - 1;
graphics.DrawLine(&pen, (REAL)x, Y, (REAL)(x + m_W - 1), Y); // GDI+
}
}
// Draw all the lines
const REAL H = m_H - 1.0f;
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counter = 0;
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std::vector< std::vector<double> >::const_iterator i = m_AllValues.begin();
for (; i != m_AllValues.end(); ++i)
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{
// Draw a line
REAL Y, oldY;
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const double scale = m_ScaleValues[counter] * H / maxValue;
int pos = m_CurrentPos;
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oldY = (REAL)((*i)[pos] * scale);
oldY = min(oldY, H);
oldY = max(oldY, 0.0f);
oldY = y + ((m_Flip) ? oldY : H - oldY);
// Cache all lines
GraphicsPath path;
for (int j = x + 1, R = x + m_W; j < R; ++j)
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{
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++pos;
if (pos >= m_W) pos = 0;
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Y = (REAL)((*i)[pos] * scale);
Y = min(Y, H);
Y = max(Y, 0.0f);
Y = y + ((m_Flip) ? Y : H - Y);
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path.AddLine((REAL)(j - 1), oldY, (REAL)j, Y);
oldY = Y;
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}
// Draw cached lines
Pen pen(m_Colors[counter], (REAL)m_LineWidth);
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pen.SetLineJoin(LineJoinBevel);
graphics.DrawPath(&pen, &path);
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++counter;
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}
return true;
}
/*
** Overwritten method to handle the other measure bindings.
**
*/
void CMeterLine::BindMeasure(const std::list<CMeasure*>& measures)
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{
CMeter::BindMeasure(measures);
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std::vector<std::wstring>::const_iterator j = m_MeasureNames.begin();
for (; j != m_MeasureNames.end(); ++j)
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{
// Go through the list and check it there is a secondary measure for us
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const WCHAR* name = (*j).c_str();
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std::list<CMeasure*>::const_iterator i = measures.begin();
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for ( ; i != measures.end(); ++i)
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{
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if (_wcsicmp((*i)->GetName(), name) == 0)
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{
m_Measures.push_back(*i);
break;
}
}
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if (i == measures.end())
{
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std::wstring error = L"The meter [" + m_Name;
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error += L"] cannot be bound with [";
error += (*j);
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error += L']';
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throw CError(error);
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}
}
CMeter::SetAllMeasures(m_Measures);
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}