ES-DE/es-app/src/guis/GuiInfoPopup.cpp

//
//  GuiInfoPopup.cpp
//
//  Popup window used for user notifications.
//

#include "guis/GuiInfoPopup.h"

#include "components/ComponentGrid.h"
#include "components/NinePatchComponent.h"
#include "components/TextComponent.h"

#ifdef __linux__
#include <SDL2/SDL_timer.h>
#else
#include "SDL_timer.h"
#endif

GuiInfoPopup::GuiInfoPopup(
        Window* window,
        std::string message,
        int duration)
        : GuiComponent(window),
        mMessage(message),
        mDuration(duration),
        running(true)
{
    mFrame = new NinePatchComponent(window);
    float maxWidth = Renderer::getScreenWidth() * 0.9f;
    float maxHeight = Renderer::getScreenHeight() * 0.2f;

    std::shared_ptr<TextComponent> s = std::make_shared<TextComponent>(mWindow, "",
        Font::get(FONT_SIZE_MINI), 0x444444FF, ALIGN_CENTER);

    // We do this to force the text container to resize and return the actual expected popup size.
    s->setSize(0,0);
    s->setText(message);
    mSize = s->getSize();

    // Confirm that the size isn't larger than the screen width, otherwise cap it.
    if (mSize.x() > maxWidth) {
        s->setSize(maxWidth, mSize[1]);
        mSize[0] = maxWidth;
    }
    if (mSize.y() > maxHeight) {
        s->setSize(mSize[0], maxHeight);
        mSize[1] = maxHeight;
    }

    // Add a padding to the box.
    int paddingX = (int) (Renderer::getScreenWidth() * 0.03f);
    int paddingY = (int) (Renderer::getScreenHeight() * 0.02f);
    mSize[0] = mSize.x() + paddingX;
    mSize[1] = mSize.y() + paddingY;

    float posX = Renderer::getScreenWidth()*0.5f - mSize.x()*0.5f;
    float posY = Renderer::getScreenHeight() * 0.02f;

    setPosition(posX, posY, 0);

    mFrame->setImagePath(":/graphics/frame.png");
    mFrame->fitTo(mSize, Vector3f::Zero(), Vector2f(-32, -32));
    addChild(mFrame);

    // We only initialize the actual time when we first start to render.
    mStartTime = 0;

    mGrid = new ComponentGrid(window, Vector2i(1, 3));
    mGrid->setSize(mSize);
    mGrid->setEntry(s, Vector2i(0, 1), false, true);
    addChild(mGrid);
}

GuiInfoPopup::~GuiInfoPopup()
{
}

void GuiInfoPopup::render(const Transform4x4f& /*parentTrans*/)
{
    // We use Identity() as we want to render on a specific window position, not on the view.
    Transform4x4f trans = getTransform() * Transform4x4f::Identity();
    if (running && updateState()) {
        // If we're still supposed to be rendering it.
        Renderer::setMatrix(trans);
        renderChildren(trans);
    }
}

bool GuiInfoPopup::updateState()
{
    int curTime = SDL_GetTicks();

    // We only initialize the actual time when we first start to render.
    if (mStartTime == 0)
        mStartTime = curTime;

    // Compute fade-in effect.
    if (curTime - mStartTime > mDuration) {
        // We're past the popup duration, no need to render.
        running = false;
        return false;
    }
    else if (curTime < mStartTime) {
        // If SDL reset.
        running = false;
        return false;
    }
    else if (curTime - mStartTime <= 500) {
        alpha = ((curTime - mStartTime)*255/500);
    }
    else if (curTime - mStartTime < mDuration - 500) {
        alpha = 255;
    }
    else {
        alpha = ((-(curTime - mStartTime - mDuration)*255)/500);
    }
    mGrid->setOpacity((unsigned char)alpha);

    // Apply fade-in effect to popup frame.
    mFrame->setEdgeColor(0xFFFFFF00 | (unsigned char)(alpha));
    mFrame->setCenterColor(0xFFFFFF00 | (unsigned char)(alpha));
    return true;
}