78 lines
1.4 KiB
C++
78 lines
1.4 KiB
C++
#include <psemek/ui/positioner.hpp>
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namespace psemek::ui
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{
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shape const & positioner::shape() const
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{
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return shape_;
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}
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void positioner::reshape(math::box<float, 2> const & box)
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{
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shape_.box = box;
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if (!child_)
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return;
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auto sc = child_->size_constraints();
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math::vector<float, 2> size;
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size[0] = sc[0].min;
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size[1] = sc[1].min;
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math::box<float, 2> cbox;
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cbox[0].min = position_[0];
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cbox[1].min = position_[1];
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cbox[0].max = cbox[0].min + size[0];
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cbox[1].max = cbox[1].min + size[1];
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switch (x_)
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{
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case x_align::left:
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break;
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case x_align::center:
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cbox[0] -= size[0] / 2.f;
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break;
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case x_align::right:
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cbox[0] -= size[0];
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break;
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}
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switch (y_)
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{
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case y_align::top:
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break;
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case y_align::center:
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cbox[1] -= size[1] / 2.f;
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break;
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case y_align::bottom:
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cbox[1] -= size[1];
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break;
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}
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if (clamp_)
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{
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cbox[0] += std::max(0.f, box[0].min - cbox[0].min);
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cbox[0] += std::min(0.f, box[0].max - cbox[0].max);
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cbox[1] += std::max(0.f, box[1].min - cbox[1].min);
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cbox[1] += std::min(0.f, box[1].max - cbox[1].max);
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}
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child_->reshape(cbox);
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}
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void positioner::set_position(math::point<float, 2> const & p, x_align x, y_align y, bool clamp)
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{
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if (p != position_ || x_ != x || y_ != y || clamp_ != clamp)
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{
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position_ = p;
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x_ = x;
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y_ = y;
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clamp_ = clamp;
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post_reshape();
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}
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}
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}
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