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Abstract out quad calculation from Sensor

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The calculation of the bounding quad is now in CairoArea, as it is quite
useful
This commit is contained in:
scorpion-26 2023-02-04 16:23:13 +01:00
parent 5654ab6f0b
commit 9e48830dc8
2 changed files with 33 additions and 22 deletions
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48
src/Widget.cpp
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@ -229,6 +229,28 @@ void CairoArea::Create()
ApplyPropertiesToWidget(); ApplyPropertiesToWidget();
} }
Quad CairoArea::GetQuad()
{
GtkAllocation dim;
gtk_widget_get_allocation(m_Widget, &dim);
Quad q;
if (dim.height >= dim.width)
{
// Height greater than width; Fill in x and add margin at the top and bottom
q.size = dim.width;
q.x = 0;
q.y = ((double)dim.height - (double)dim.width) / 2;
}
else if (dim.width < dim.height)
{
// Height greater than width; Fill in y and add margin at the sides
q.size = dim.height;
q.y = 0;
q.x = ((double)dim.width - (double)dim.height) / 2;
}
return q;
}
void Sensor::SetValue(double val) void Sensor::SetValue(double val)
{ {
m_Val = val; m_Val = val;
@ -245,29 +267,11 @@ void Sensor::SetStyle(SensorStyle style)
void Sensor::Draw(cairo_t* cr) void Sensor::Draw(cairo_t* cr)
{ {
GtkAllocation dim; Quad q = GetQuad();
gtk_widget_get_allocation(m_Widget, &dim);
double xStart = 0;
double yStart = 0;
double size = dim.width;
if (dim.height >= dim.width)
{
// Height greater than width; Fill in x and add margin at the top and bottom
size = dim.width;
xStart = 0;
yStart = ((double)dim.height - (double)dim.width) / 2;
}
else if (dim.width < dim.height)
{
// Height greater than width; Fill in y and add margin at the sides
size = dim.height;
yStart = 0;
xStart = ((double)dim.width - (double)dim.height) / 2;
}
double xCenter = xStart + size / 2; double xCenter = q.x + q.size / 2;
double yCenter = yStart + size / 2; double yCenter = q.y + q.size / 2;
double radius = (size / 2) - (m_Style.strokeWidth / 2); double radius = (q.size / 2) - (m_Style.strokeWidth / 2);
double beg = m_Style.start * (M_PI / 180); double beg = m_Style.start * (M_PI / 180);
double angle = m_Val * 2 * M_PI; double angle = m_Val * 2 * M_PI;

7
src/Widget.h
View file

@ -47,6 +47,11 @@ struct Transition
uint32_t durationMS; uint32_t durationMS;
}; };
struct Quad
{
double x, y, size;
};
struct SensorStyle struct SensorStyle
{ {
double start = -90; // 0 = leftmost; -90 = topmost double start = -90; // 0 = leftmost; -90 = topmost
@ -203,6 +208,8 @@ public:
protected: protected:
virtual void Draw(cairo_t* cr) = 0; virtual void Draw(cairo_t* cr) = 0;
Quad GetQuad();
}; };
class Sensor : public CairoArea class Sensor : public CairoArea