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changed to give it a default constructor

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This commit is contained in:
Bob Polis 2020-10-27 15:23:35 +01:00
parent 5c5c702c91
commit 0f1a681908
2 changed files with 14 additions and 13 deletions
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15
ScreensaverPlugin.cpp
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@ -8,9 +8,9 @@
#include "ScreensaverPlugin.hpp"
ScreensaverPlugin::ScreensaverPlugin(cairo_t* context, const cairo_rectangle_t& rect)
: _c {context}, _r {rect}, _x_dist {rect.x, rect.width}, _y_dist {rect.y, rect.height} {
void ScreensaverPlugin::setup(cairo_t* context, const cairo_rectangle_t& rect) {
_c = context;
_r = rect;
}
void ScreensaverPlugin::make_black() {
@ -44,13 +44,16 @@ cairo_rectangle_t ScreensaverPlugin::random_rect() {
}
double ScreensaverPlugin::random_x() {
return _x_dist(_eng);
std::uniform_real_distribution<double> dist {0, _r.width};
return dist(_eng);
}
double ScreensaverPlugin::random_y() {
return _y_dist(_eng);
std::uniform_real_distribution<double> dist {0, _r.height};
return dist(_eng);
}
double ScreensaverPlugin::random01() {
return _01_dist(_eng);
std::uniform_real_distribution<double> dist {};
return dist(_eng);
}

12
ScreensaverPlugin.hpp
View File

@ -14,20 +14,18 @@
class ScreensaverPlugin {
public:
ScreensaverPlugin(cairo_t* context, const cairo_rectangle_t& rect);
ScreensaverPlugin() = default;
virtual ~ScreensaverPlugin() = default;
virtual void setup(cairo_t* context, const cairo_rectangle_t& rect) = 0;
virtual void draw_frame() = 0;
virtual int fps() const = 0;
protected:
cairo_t* _c;
cairo_rectangle_t _r;
std::random_device _dev;
cairo_t* _c {nullptr};
cairo_rectangle_t _r {};
std::random_device _dev {};
std::default_random_engine _eng {_dev()};
std::uniform_real_distribution<> _01_dist {};
std::uniform_real_distribution<> _x_dist;
std::uniform_real_distribution<> _y_dist;
void make_black();
cairo_rectangle_t random_rect();