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qtSimpleGraph
mirror of https://github.com/temaps/qtSimpleGraph.git
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Возможность начала координат в центре окна, исправления рассчёта

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main
Artem Proskurnev 4 years ago
parent e5d6b2ef60
commit f9d93b6d08
3 changed files with 115 additions and 45 deletions
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  1. 2
      main.cpp
  2. 152
      qtsgraph.cpp
  3. 6
      qtsgraph.h

2
main.cpp
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@ -12,6 +12,7 @@ int main(int argc, char *argv[])
QTSGraph w(600, 600);
//w.SwapYAxis = true;
//w.MoveOtoCenter = true;
w.show();
return a.exec();
}
@ -20,6 +21,7 @@ void QTSGraph::PaintBox()
{
// Начало рисования
//ShowAxes();
SetColor(clGreen);
Line(0, 0, 600, 600);
SetColor(0xFF0000);

152
qtsgraph.cpp
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@ -50,16 +50,17 @@ void QTSGraph::Ellipse(int x1, int y1, int x2, int y2)
QPainter painter(&Canvas);
painter.setPen(Pen);
painter.setBrush(Brush);
ChangeCoord(&x1, &y1);
ChangeCoord(&x2, &y2);
if(y1 > y2) std::swap(y1, y2);
if(x1 > x2) std::swap(x1, x2);
if(SwapYAxis) painter.drawEllipse(x1, Canvas.height() - y1 - abs(y2 - y1) - 1, abs(x2-x1), abs(y2-y1));
else painter.drawEllipse(x1, y1, abs(x2-x1), abs(y2-y1));
painter.drawEllipse(x1, y1, abs(x2-x1), abs(y2-y1));
update();
}
QRgb QTSGraph::GetPixel(int x, int y)
{
if(SwapYAxis) y = Canvas.height() - y - 1;
ChangeCoord(&x, &y);
return Canvas.toImage().pixelColor(x, y).rgba() % 0x1000000;
}
@ -95,6 +96,7 @@ QTSGraph::QTSGraph(int w, int h, int x, int y, QWidget *parent)
StartTimer = new QTimer();
connect(StartTimer, SIGNAL(timeout()), this, SLOT(slotStartTimer()));
StartTimer->start(500);
setMouseTracking(true);
}
QTSGraph::~QTSGraph()
@ -117,8 +119,8 @@ void QTSGraph::Circle(int x, int y, int radius)
QPainter painter(&Canvas);
painter.setPen(Pen);
painter.setBrush(Brush);
if(SwapYAxis) painter.drawEllipse(x - radius, Canvas.height() - (y - radius) - (radius * 2) - 1, radius * 2, radius * 2);
else painter.drawEllipse(x - radius, y - radius, radius * 2, radius * 2);
ChangeCoord(&x, &y);
painter.drawEllipse(x - radius, y - radius, radius * 2, radius * 2);
update();
}
@ -136,7 +138,7 @@ void QTSGraph::OutTextXY(int x, int y, std::string caption)
painter.setPen(Pen);
painter.setFont(Font);
double r, b, sa, ca, sb, cb, xn, yn;
if(SwapYAxis) y = Canvas.height() - y - 1;
ChangeCoord(&x, &y);
b = TextDirection * 3.14159 / 180;
r = sqrt(x * x + y * y);
sa = y / r;
@ -155,8 +157,8 @@ void QTSGraph::PutPixel(int x, int y, QRgb c, int PenWidth)
{
QPainter painter(&Canvas);
painter.setPen(QPen(QBrush(QColor(c)), PenWidth));
if(SwapYAxis) painter.drawPoint(x, Canvas.height() - y - 1);
else painter.drawPoint(x, y);
ChangeCoord(&x, &y);
painter.drawPoint(x, y);
update();
}
@ -185,11 +187,27 @@ int QTSGraph::ReadMouseButton()
}
TPixel QTSGraph::ReadMousePosition()
{
TPixel t;
t.x = MouseMovePosition.x();
t.y = MouseMovePosition.y();
t.color = GetPixel(t.x, t.y);
if(SwapYAxis) t.y = Canvas.height() - t.y - 1;
if(MoveOtoCenter)
{
t.x -= Canvas.width() / 2;
t.y -= Canvas.height() / 2;
}
return t;
}
TPixel QTSGraph::GetLastMouseClickPosition()
{
TPixel t;
t.x = LastMouseClickPosition.x();
t.y = LastMouseClickPosition.y();
t.color = GetPixel(t.x, t.y);
ChangeCoord(&t.x, &t.y);
return t;
}
@ -198,10 +216,11 @@ void QTSGraph::Rectangle(int x1, int y1, int x2, int y2)
QPainter painter(&Canvas);
painter.setPen(Pen);
painter.setBrush(Brush);
ChangeCoord(&x1, &y1);
ChangeCoord(&x2, &y2);
if(y1 > y2) std::swap(y1, y2);
if(x1 > x2) std::swap(x1, x2);
if(SwapYAxis) painter.drawRect(x1, Canvas.height() - y1 - abs(y2 - y1) - 1, x2 - x1, y2 - y1);
else painter.drawRect(x1, y1, x2 - x1, y2 - y1);
painter.drawRect(x1, y1, x2 - x1, y2 - y1);
update();
}
@ -247,8 +266,9 @@ void QTSGraph::Line(int x1, int y1, int x2, int y2)
{
QPainter painter(&Canvas);
painter.setPen(Pen);
if(SwapYAxis) painter.drawLine(x1, Canvas.height() - y1 - 1, x2, Canvas.height() - y2 - 1);
else painter.drawLine(x1, y1, x2, y2);
ChangeCoord(&x1, &y1);
ChangeCoord(&x2, &y2);
painter.drawLine(x1, y1, x2, y2);
update();
}
@ -266,6 +286,16 @@ void QTSGraph::slotStartTimer()
PaintBox();
}
void QTSGraph::ChangeCoord(int *x, int *y)
{
if(MoveOtoCenter)
{
*x += Canvas.width() / 2;
*y += Canvas.height() / 2;
}
if(SwapYAxis) *y = Canvas.height() - *y - 1;
}
void QTSGraph::slotResetTimer()
{
ResetTimer->stop();
@ -281,44 +311,70 @@ void QTSGraph::paintEvent(QPaintEvent *event)
int mult = 1;
if(AxesVisible)
{
p.setPen(QPen(QBrush(QColor(Qt::red)), 3));
if(SwapYAxis)
if(MoveOtoCenter)
{
p.drawLine(0, Canvas.height() - 1, Canvas.width() - 1, Canvas.height() - 1);
p.drawLine(Canvas.width() - 10, Canvas.height() - 10, Canvas.width() - 1, Canvas.height() - 1);
p.drawText(Canvas.width() - 10, Canvas.height() - 15, "X");
p.drawLine(0, Canvas.height() - 1, 0, 0);
p.drawLine(10, 10, 0, 0);
p.drawText(12, 12, "Y");
correctY = 1;
p.setPen(QPen(QBrush(QColor(Qt::red)), 1));
if(SwapYAxis)
{
p.drawLine(Canvas.width() / 2, 0, Canvas.width() / 2, Canvas.height() - 1);
p.drawLine(Canvas.width() / 2, 0, Canvas.width() / 2 + 10, 10);
p.drawLine(Canvas.width() / 2, 0, Canvas.width() / 2 - 10, 10);
p.drawText(Canvas.width() / 2 - 20, 12, "Y");
correctY = 1;
}
else
{
p.drawLine(Canvas.width() / 2, 0, Canvas.width() / 2, Canvas.height() - 1);
p.drawLine(Canvas.width() / 2, Canvas.height() - 1, Canvas.width() / 2 + 10, Canvas.height() - 1 - 10);
p.drawLine(Canvas.width() / 2, Canvas.height() - 1, Canvas.width() / 2 - 10, Canvas.height() - 1 - 10);
p.drawText(Canvas.width() / 2 - 20, Canvas.height() - 2, "Y");
}
p.drawLine(0, Canvas.height() / 2, Canvas.width() - 1, Canvas.height() / 2);
p.drawLine(Canvas.width() - 1, Canvas.height() / 2, Canvas.width() - 1 - 10, Canvas.height() / 2 + 10);
p.drawLine(Canvas.width() - 1, Canvas.height() / 2, Canvas.width() - 1 - 10, Canvas.height() / 2 - 10);
p.drawText(Canvas.width() - 1 - 10, Canvas.height() / 2 + 20, "X");
}
else
{
p.drawLine(0, 0, Canvas.width() - 1, 0);
p.drawLine(Canvas.width() - 10, 10, Canvas.width() - 1, 0);
p.drawText(Canvas.width() - 10, 22, "X");
p.drawLine(0, Canvas.height() - 1, 0, 0);
p.drawLine(10, Canvas.height() - 10, 0, Canvas.height() - 1);
p.drawText(13, Canvas.height() - 2, "Y");
p.setPen(QPen(QBrush(QColor(Qt::red)), 3));
if(SwapYAxis)
{
p.drawLine(0, Canvas.height() - 1, Canvas.width() - 1, Canvas.height() - 1);
p.drawLine(Canvas.width() - 10, Canvas.height() - 10, Canvas.width() - 1, Canvas.height() - 1);
p.drawText(Canvas.width() - 10, Canvas.height() - 15, "X");
p.drawLine(0, Canvas.height() - 1, 0, 0);
p.drawLine(10, 10, 0, 0);
p.drawText(12, 12, "Y");
correctY = 1;
}
else
{
p.drawLine(0, 0, Canvas.width() - 1, 0);
p.drawLine(Canvas.width() - 10, 10, Canvas.width() - 1, 0);
p.drawText(Canvas.width() - 10, 22, "X");
p.drawLine(0, Canvas.height() - 1, 0, 0);
p.drawLine(10, Canvas.height() - 10, 0, Canvas.height() - 1);
p.drawText(13, Canvas.height() - 2, "Y");
}
p.setPen(QPen(QBrush(QColor(Qt::lightGray)), 1));
p.drawLine(Canvas.width() / 2, 0, Canvas.width() / 2, Canvas.height() - 1);
p.drawLine(0, Canvas.height() / 2 - correctY, Canvas.width() - 1, Canvas.height() / 2 - correctY);
p.drawText(Canvas.width() / 2 + 2, 12, QString::number(Canvas.width() / 2));
p.drawText(2, Canvas.height() / 2 - 2, QString::number(Canvas.height() / 2));
p.setPen(QPen(QBrush(QColor(0xDDDDDD)), 1));
p.drawLine(Canvas.width() / 4, 0, Canvas.width() / 4, Canvas.height() - 1);
p.drawLine(0, Canvas.height() / 4 - correctY, Canvas.width() - 1, Canvas.height() / 4 - correctY);
p.drawText(Canvas.width() / 4 + 2, 12, QString::number(Canvas.width() / 4));
if(correctY) mult = 3;
p.drawText(2, Canvas.height() / 4 - 2, QString::number(mult * Canvas.height() / 4));
p.drawLine(3 * Canvas.width() / 4, 0, 3 * Canvas.width() / 4, Canvas.height() - 1);
p.drawLine(0, 3 * Canvas.height() / 4 - correctY, Canvas.width() - 1, 3 * Canvas.height() / 4 - correctY);
p.drawText(3 * Canvas.width() / 4 + 2, 12, QString::number(3 * Canvas.width() / 4));
mult = correctY ? 1 : 3;
p.drawText(2, 3 * Canvas.height() / 4 - 2, QString::number(mult * Canvas.height() / 4));
}
p.setPen(QPen(QBrush(QColor(Qt::lightGray)), 1));
p.drawLine(Canvas.width() / 2, 0, Canvas.width() / 2, Canvas.height() - 1);
p.drawLine(0, Canvas.height() / 2 - correctY, Canvas.width() - 1, Canvas.height() / 2 - correctY);
p.drawText(Canvas.width() / 2 + 2, 12, QString::number(Canvas.width() / 2));
p.drawText(2, Canvas.height() / 2 - 2, QString::number(Canvas.height() / 2));
p.setPen(QPen(QBrush(QColor(0xDDDDDD)), 1));
p.drawLine(Canvas.width() / 4, 0, Canvas.width() / 4, Canvas.height() - 1);
p.drawLine(0, Canvas.height() / 4 - correctY, Canvas.width() - 1, Canvas.height() / 4 - correctY);
p.drawText(Canvas.width() / 4 + 2, 12, QString::number(Canvas.width() / 4));
if(correctY) mult = 3;
p.drawText(2, Canvas.height() / 4 - 2, QString::number(mult * Canvas.height() / 4));
p.drawLine(3 * Canvas.width() / 4, 0, 3 * Canvas.width() / 4, Canvas.height() - 1);
p.drawLine(0, 3 * Canvas.height() / 4 - correctY, Canvas.width() - 1, 3 * Canvas.height() / 4 - correctY);
p.drawText(3 * Canvas.width() / 4 + 2, 12, QString::number(3 * Canvas.width() / 4));
mult = correctY ? 1 : 3;
p.drawText(2, 3 * Canvas.height() / 4 - 2, QString::number(mult * Canvas.height() / 4));
}
}
@ -345,6 +401,12 @@ void QTSGraph::mousePressEvent(QMouseEvent *event)
ResetTimer->start(ResetInterval);
}
void QTSGraph::mouseMoveEvent(QMouseEvent *event)
{
MouseMovePosition = event->pos();
update();
}
void QTSGraph::keyPressEvent(QKeyEvent *event)
{
ResetTimer->stop();

6
qtsgraph.h
Unescape View File

@ -76,6 +76,7 @@ public:
~QTSGraph();
bool SwapYAxis = false;
bool MoveOtoCenter = false;
void ShowAxes();
void HideAxes();
@ -92,6 +93,7 @@ public:
int ReadKey();
int ReadMouseButton();
TPixel ReadMousePosition();
TPixel GetLastMouseClickPosition();
void Rectangle(int x1, int y1, int x2, int y2);
void SetColor(const QColor &c = Qt::black);
void SetColor(const QRgb c = 0x00000000);
@ -146,6 +148,7 @@ private:
int ResetInterval;
int TextDirection = 0;
QPoint LastMouseClickPosition;
QPoint MouseMovePosition;
QBrush Brush;
QPixmap Canvas;
@ -154,11 +157,14 @@ private:
QTimer *ResetTimer;
QTimer *StartTimer;
void ChangeCoord(int* x, int* y);
void PaintBox();
protected:
void closeEvent(QCloseEvent *event) override;
void keyPressEvent(QKeyEvent *event) override;
void mousePressEvent(QMouseEvent *event) override;
void mouseMoveEvent(QMouseEvent *event) override;
void paintEvent(QPaintEvent *event) override;
};

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