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https://github.com/J-D-K/JKSV.git
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83 lines
2.8 KiB
C++
83 lines
2.8 KiB
C++
#include "ui/PopMessage.hpp"
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#include "config/config.hpp"
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#include "graphics/colors.hpp"
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#include "mathutil.hpp"
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#include "sdl.hpp"
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ui::PopMessage::PopMessage(int ticks, std::string_view message)
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: m_ticks(ticks)
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, m_message(message)
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, m_y(PopMessage::START_Y)
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, m_width(PopMessage::START_WIDTH)
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, m_dialog(ui::DialogBox::create(PopMessage::START_X,
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m_y - 6,
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PopMessage::START_WIDTH,
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PopMessage::PERMA_HEIGHT,
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ui::DialogBox::Type::Light)) {};
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void ui::PopMessage::update(double targetY)
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{
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update_y(targetY);
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update_text_offset();
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if (m_displayTimer.is_triggered()) { m_finished = true; }
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}
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void ui::PopMessage::render()
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{
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m_dialog->render(sdl::Texture::Null, false);
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if (!m_yMet) { return; }
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// This avoids allocating and returning another std::string.
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const std::string_view message(m_message.c_str(), m_substrOffset);
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sdl::text::render(sdl::Texture::Null, m_textX, m_y + 5, 22, sdl::text::NO_WRAP, colors::BLACK, message);
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}
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bool ui::PopMessage::finished() const noexcept { return m_finished; }
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std::string_view ui::PopMessage::get_message() const noexcept { return m_message; }
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void ui::PopMessage::update_y(double targetY) noexcept
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{
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if (m_y == targetY) { return; }
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const double scaling = config::get_animation_scaling();
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const double increase = (targetY - m_y) / scaling;
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m_y += increase;
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const int distance = math::Util<double>::absolute_distance(targetY, m_y);
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if (distance <= 2)
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{
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m_y = targetY;
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m_yMet = true;
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m_typeTimer.start(5);
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}
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m_dialog->set_y(m_y - 6);
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}
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void ui::PopMessage::update_text_offset() noexcept
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{
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static constexpr int HALF_WIDTH = 640;
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const int messageLength = m_message.length();
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if (!m_yMet || m_substrOffset >= messageLength || !m_typeTimer.is_triggered()) { return; }
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// This is slightly more technical than I originally thought, but I liked the effect so.
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uint32_t codepoint{};
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const char *message = m_message.c_str();
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const uint8_t *targetPoint = reinterpret_cast<const uint8_t *>(&message[m_substrOffset]);
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const ssize_t unitCount = decode_utf8(&codepoint, targetPoint);
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if (unitCount <= 0) { return; }
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m_substrOffset += unitCount;
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const std::string_view subMessage(message, m_substrOffset);
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const int stringWidth = sdl::text::get_width(22, subMessage);
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m_textX = HALF_WIDTH - (stringWidth / 2);
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const int dialogX = m_textX - 16;
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const int dialogWidth = stringWidth + 32;
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m_dialog->set_x(dialogX);
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m_dialog->set_width(dialogWidth);
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if (m_substrOffset >= messageLength) { m_displayTimer.start(m_ticks); }
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}
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