75 lines
1.9 KiB
C++
75 lines
1.9 KiB
C++
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#pragma once
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#include <halp/custom_widgets.hpp>
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#include <avnd/wrappers/controls.hpp>
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#include <avnd/concepts/painter.hpp>
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struct CustomSlider
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{
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// Same as above
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static constexpr double width() { return 100.; }
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static constexpr double height() { return 20.; }
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// Needed for changing the ui. It's the type above - it's already defined as-is
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// in the helpers library.
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halp::transaction<int> transaction;
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// Called when the value changes from the host software.
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void set_value(const auto& control, int value)
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{
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this->value = avnd::map_control_to_01(control, value / 127.f);
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}
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// When transaction.update() is called, this converts the value in the slider
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// into one fit for the control definition passed as argument.
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static auto value_to_control(auto& control, int value)
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{
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return avnd::map_control_from_01(control, value / 127.f);
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}
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// Paint method: same as above
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void paint(avnd::painter auto ctx)
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{
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ctx.set_stroke_color({200, 200, 200, 255});
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ctx.set_stroke_width(2.);
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ctx.set_fill_color({120, 120, 120, 255});
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ctx.begin_path();
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ctx.draw_rect(0., 0., width(), height());
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ctx.fill();
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ctx.stroke();
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ctx.begin_path();
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ctx.set_fill_color({90, 90, 90, 255});
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ctx.draw_rect(2., 2., (width() - 4) * (value / 127.f), (height() - 4));
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ctx.fill();
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}
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// Return true to handle the event. x, y, are the positions of the item in local coordinates.
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bool mouse_press(double x, double y)
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{
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transaction.start();
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mouse_move(x, y);
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return true;
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}
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// Obvious :-)
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void mouse_move(double x, double y)
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{
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const int res{static_cast<int>(std::clamp(x / width(), 0., 1.) * 127)};
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transaction.update(res);
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on_changed(value);
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}
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// Same
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void mouse_release(double x, double y)
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{
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mouse_move(x, y);
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transaction.commit();
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}
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int value{};
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std::function<void(int)> on_changed{[](int){}};
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};
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