Carla/source/modules/juce_gui_basics/lookandfeel/juce_LookAndFeel_V1.cpp

/*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2020 - Raw Material Software Limited

   JUCE is an open source library subject to commercial or open-source
   licensing.

   By using JUCE, you agree to the terms of both the JUCE 6 End-User License
   Agreement and JUCE Privacy Policy (both effective as of the 16th June 2020).

   End User License Agreement: www.juce.com/juce-6-licence
   Privacy Policy: www.juce.com/juce-privacy-policy

   Or: You may also use this code under the terms of the GPL v3 (see
   www.gnu.org/licenses).

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

namespace juce
{

LookAndFeel_V1::LookAndFeel_V1()
{
    setColour (TextButton::buttonColourId,          Colour (0xffbbbbff));
    setColour (ListBox::outlineColourId,            findColour (ComboBox::outlineColourId));
    setColour (ScrollBar::thumbColourId,            Colour (0xffbbbbdd));
    setColour (ScrollBar::backgroundColourId,       Colours::transparentBlack);
    setColour (Slider::thumbColourId,               Colours::white);
    setColour (Slider::trackColourId,               Colour (0x7f000000));
    setColour (Slider::textBoxOutlineColourId,      Colours::grey);
    setColour (ProgressBar::backgroundColourId,     Colours::white.withAlpha (0.6f));
    setColour (ProgressBar::foregroundColourId,     Colours::green.withAlpha (0.7f));
    setColour (PopupMenu::backgroundColourId,             Colour (0xffeef5f8));
    setColour (PopupMenu::highlightedBackgroundColourId,  Colour (0xbfa4c2ce));
    setColour (PopupMenu::highlightedTextColourId,        Colours::black);
    setColour (TextEditor::focusedOutlineColourId,  findColour (TextButton::buttonColourId));

    scrollbarShadow.setShadowProperties (DropShadow (Colours::black.withAlpha (0.5f), 2, Point<int>()));
}

LookAndFeel_V1::~LookAndFeel_V1()
{
}

//==============================================================================
void LookAndFeel_V1::drawButtonBackground (Graphics& g, Button& button, const Colour& backgroundColour,
                                           bool shouldDrawButtonAsHighlighted, bool shouldDrawButtonAsDown)
{
    const int width = button.getWidth();
    const int height = button.getHeight();

    const float indent = 2.0f;
    const int cornerSize = jmin (roundToInt ((float) width * 0.4f),
                                 roundToInt ((float) height * 0.4f));

    Path p;
    p.addRoundedRectangle (indent, indent,
                           (float) width - indent * 2.0f,
                           (float) height - indent * 2.0f,
                           (float) cornerSize);

    Colour bc (backgroundColour.withMultipliedSaturation (0.3f));

    if (shouldDrawButtonAsHighlighted)
    {
        if (shouldDrawButtonAsDown)
            bc = bc.brighter();
        else if (bc.getBrightness() > 0.5f)
            bc = bc.darker (0.1f);
        else
            bc = bc.brighter (0.1f);
    }

    g.setColour (bc);
    g.fillPath (p);

    g.setColour (bc.contrasting().withAlpha ((shouldDrawButtonAsHighlighted) ? 0.6f : 0.4f));
    g.strokePath (p, PathStrokeType ((shouldDrawButtonAsHighlighted) ? 2.0f : 1.4f));
}

void LookAndFeel_V1::drawTickBox (Graphics& g, Component& /*component*/,
                                  float x, float y, float w, float h,
                                  const bool ticked,
                                  const bool isEnabled,
                                  const bool /*shouldDrawButtonAsHighlighted*/,
                                  const bool shouldDrawButtonAsDown)
{
    Path box;
    box.addRoundedRectangle (0.0f, 2.0f, 6.0f, 6.0f, 1.0f);

    g.setColour (isEnabled ? Colours::blue.withAlpha (shouldDrawButtonAsDown ? 0.3f : 0.1f)
                           : Colours::lightgrey.withAlpha (0.1f));

    AffineTransform trans (AffineTransform::scale (w / 9.0f, h / 9.0f).translated (x, y));

    g.fillPath (box, trans);

    g.setColour (Colours::black.withAlpha (0.6f));
    g.strokePath (box, PathStrokeType (0.9f), trans);

    if (ticked)
    {
        Path tick;
        tick.startNewSubPath (1.5f, 3.0f);
        tick.lineTo (3.0f, 6.0f);
        tick.lineTo (6.0f, 0.0f);

        g.setColour (isEnabled ? Colours::black : Colours::grey);
        g.strokePath (tick, PathStrokeType (2.5f), trans);
    }
}

void LookAndFeel_V1::drawToggleButton (Graphics& g, ToggleButton& button, bool shouldDrawButtonAsHighlighted, bool shouldDrawButtonAsDown)
{
    if (button.hasKeyboardFocus (true))
    {
        g.setColour (button.findColour (TextEditor::focusedOutlineColourId));
        g.drawRect (0, 0, button.getWidth(), button.getHeight());
    }

    const int tickWidth = jmin (20, button.getHeight() - 4);

    drawTickBox (g, button, 4.0f, (float) (button.getHeight() - tickWidth) * 0.5f,
                 (float) tickWidth, (float) tickWidth,
                 button.getToggleState(),
                 button.isEnabled(),
                 shouldDrawButtonAsHighlighted,
                 shouldDrawButtonAsDown);

    g.setColour (button.findColour (ToggleButton::textColourId));
    g.setFont (jmin (15.0f, (float) button.getHeight() * 0.6f));

    if (! button.isEnabled())
        g.setOpacity (0.5f);

    const int textX = tickWidth + 5;

    g.drawFittedText (button.getButtonText(),
                      textX, 4,
                      button.getWidth() - textX - 2, button.getHeight() - 8,
                      Justification::centredLeft, 10);
}

void LookAndFeel_V1::drawProgressBar (Graphics& g, ProgressBar& progressBar,
                                      int width, int height,
                                      double progress, const String& textToShow)
{
    if (progress < 0 || progress >= 1.0)
    {
        LookAndFeel_V2::drawProgressBar (g, progressBar, width, height, progress, textToShow);
    }
    else
    {
        const Colour background (progressBar.findColour (ProgressBar::backgroundColourId));
        const Colour foreground (progressBar.findColour (ProgressBar::foregroundColourId));

        g.fillAll (background);
        g.setColour (foreground);

        g.fillRect (1, 1,
                    jlimit (0, width - 2, roundToInt (progress * (width - 2))),
                    height - 2);

        if (textToShow.isNotEmpty())
        {
            g.setColour (Colour::contrasting (background, foreground));
            g.setFont ((float) height * 0.6f);

            g.drawText (textToShow, 0, 0, width, height, Justification::centred, false);
        }
    }
}

void LookAndFeel_V1::drawScrollbarButton (Graphics& g, ScrollBar& bar,
                                          int width, int height, int buttonDirection,
                                          bool isScrollbarVertical,
                                          bool shouldDrawButtonAsHighlighted,
                                          bool shouldDrawButtonAsDown)
{
    if (isScrollbarVertical)
        width -= 2;
    else
        height -= 2;

    Path p;

    const auto w = (float) width;
    const auto h = (float) height;

    if (buttonDirection == 0)
        p.addTriangle (w * 0.5f, h * 0.2f,
                       w * 0.1f, h * 0.7f,
                       w * 0.9f, h * 0.7f);
    else if (buttonDirection == 1)
        p.addTriangle (w * 0.8f, h * 0.5f,
                       w * 0.3f, h * 0.1f,
                       w * 0.3f, h * 0.9f);
    else if (buttonDirection == 2)
        p.addTriangle (w * 0.5f, h * 0.8f,
                       w * 0.1f, h * 0.3f,
                       w * 0.9f, h * 0.3f);
    else if (buttonDirection == 3)
        p.addTriangle (w * 0.2f, h * 0.5f,
                       w * 0.7f, h * 0.1f,
                       w * 0.7f, h * 0.9f);

    if (shouldDrawButtonAsDown)
        g.setColour (Colours::white);
    else if (shouldDrawButtonAsHighlighted)
        g.setColour (Colours::white.withAlpha (0.7f));
    else
        g.setColour (bar.findColour (ScrollBar::thumbColourId).withAlpha (0.5f));

    g.fillPath (p);

    g.setColour (Colours::black.withAlpha (0.5f));
    g.strokePath (p, PathStrokeType (0.5f));
}

void LookAndFeel_V1::drawScrollbar (Graphics& g, ScrollBar& bar,
                                    int x, int y, int width, int height,
                                    bool isScrollbarVertical, int thumbStartPosition, int thumbSize,
                                    bool isMouseOver, bool isMouseDown)
{
    g.fillAll (bar.findColour (ScrollBar::backgroundColourId));

    g.setColour (bar.findColour (ScrollBar::thumbColourId)
                    .withAlpha ((isMouseOver || isMouseDown) ? 0.4f : 0.15f));

    if ((float) thumbSize > 0.0f)
    {
        Rectangle<int> thumb;

        if (isScrollbarVertical)
        {
            width -= 2;
            g.fillRect (x + roundToInt ((float) width * 0.35f), y,
                        roundToInt ((float) width * 0.3f), height);

            thumb.setBounds (x + 1, thumbStartPosition,
                             width - 2, thumbSize);
        }
        else
        {
            height -= 2;
            g.fillRect (x, y + roundToInt ((float) height * 0.35f),
                        width, roundToInt ((float) height * 0.3f));

            thumb.setBounds (thumbStartPosition, y + 1,
                             thumbSize, height - 2);
        }

        g.setColour (bar.findColour (ScrollBar::thumbColourId)
                        .withAlpha ((isMouseOver || isMouseDown) ? 0.95f : 0.7f));

        g.fillRect (thumb);

        g.setColour (Colours::black.withAlpha ((isMouseOver || isMouseDown) ? 0.4f : 0.25f));
        g.drawRect (thumb.getX(), thumb.getY(), thumb.getWidth(), thumb.getHeight());

        if (thumbSize > 16)
        {
            for (int i = 3; --i >= 0;)
            {
                const float linePos = (float) thumbStartPosition + (float) thumbSize * 0.5f + (float) (i - 1) * 4.0f;
                g.setColour (Colours::black.withAlpha (0.15f));

                if (isScrollbarVertical)
                {
                    g.drawLine ((float) x + (float) width * 0.2f, linePos, (float) width * 0.8f, linePos);
                    g.setColour (Colours::white.withAlpha (0.15f));
                    g.drawLine ((float) width * 0.2f, linePos - 1.0f, (float) width * 0.8f, linePos - 1.0f);
                }
                else
                {
                    g.drawLine (linePos, (float) height * 0.2f, linePos, (float) height * 0.8f);
                    g.setColour (Colours::white.withAlpha (0.15f));
                    g.drawLine (linePos - 1.0f, (float) height * 0.2f, linePos - 1.0f, (float) height * 0.8f);
                }
            }
        }
    }
}

ImageEffectFilter* LookAndFeel_V1::getScrollbarEffect()
{
    return &scrollbarShadow;
}


//==============================================================================
void LookAndFeel_V1::drawPopupMenuBackground (Graphics& g, int width, int height)
{
    g.fillAll (findColour (PopupMenu::backgroundColourId));

    g.setColour (Colours::black.withAlpha (0.6f));
    g.drawRect (0, 0, width, height);
}

void LookAndFeel_V1::drawMenuBarBackground (Graphics& g, int /*width*/, int /*height*/, bool, MenuBarComponent& menuBar)
{
    g.fillAll (menuBar.findColour (PopupMenu::backgroundColourId));
}


//==============================================================================
void LookAndFeel_V1::drawTextEditorOutline (Graphics& g, int width, int height, TextEditor& textEditor)
{
    if (textEditor.isEnabled())
    {
        g.setColour (textEditor.findColour (TextEditor::outlineColourId));
        g.drawRect (0, 0, width, height);
    }
}

//==============================================================================
void LookAndFeel_V1::drawComboBox (Graphics& g, int width, int height,
                                   const bool isButtonDown,
                                   int buttonX, int buttonY, int buttonW, int buttonH,
                                   ComboBox& box)
{
    g.fillAll (box.findColour (ComboBox::backgroundColourId));

    g.setColour (box.findColour ((isButtonDown) ? ComboBox::buttonColourId
                                                : ComboBox::backgroundColourId));
    g.fillRect (buttonX, buttonY, buttonW, buttonH);

    g.setColour (box.findColour (ComboBox::outlineColourId));
    g.drawRect (0, 0, width, height);

    const float arrowX = 0.2f;
    const float arrowH = 0.3f;

    const auto x = (float) buttonX;
    const auto y = (float) buttonY;
    const auto w = (float) buttonW;
    const auto h = (float) buttonH;

    if (box.isEnabled())
    {
        Path p;
        p.addTriangle (x + w * 0.5f,            y + h * (0.45f - arrowH),
                       x + w * (1.0f - arrowX), y + h * 0.45f,
                       x + w * arrowX,          y + h * 0.45f);

        p.addTriangle (x + w * 0.5f,            y + h * (0.55f + arrowH),
                       x + w * (1.0f - arrowX), y + h * 0.55f,
                       x + w * arrowX,          y + h * 0.55f);

        g.setColour (box.findColour ((isButtonDown) ? ComboBox::backgroundColourId
                                                    : ComboBox::buttonColourId));
        g.fillPath (p);
    }
}

Font LookAndFeel_V1::getComboBoxFont (ComboBox& box)
{
    Font f (jmin (15.0f, (float) box.getHeight() * 0.85f));
    f.setHorizontalScale (0.9f);
    return f;
}

//==============================================================================
static void drawTriangle (Graphics& g, float x1, float y1, float x2, float y2, float x3, float y3, Colour fill, Colour outline)
{
    Path p;
    p.addTriangle (x1, y1, x2, y2, x3, y3);
    g.setColour (fill);
    g.fillPath (p);

    g.setColour (outline);
    g.strokePath (p, PathStrokeType (0.3f));
}

void LookAndFeel_V1::drawLinearSlider (Graphics& g,
                                       int x, int y, int w, int h,
                                       float sliderPos, float minSliderPos, float maxSliderPos,
                                       const Slider::SliderStyle style,
                                       Slider& slider)
{
    g.fillAll (slider.findColour (Slider::backgroundColourId));

    if (style == Slider::LinearBar)
    {
        g.setColour (slider.findColour (Slider::thumbColourId));
        g.fillRect (x, y, (int) sliderPos - x, h);

        g.setColour (slider.findColour (Slider::textBoxTextColourId).withMultipliedAlpha (0.5f));
        g.drawRect (x, y, (int) sliderPos - x, h);
    }
    else
    {
        g.setColour (slider.findColour (Slider::trackColourId)
                           .withMultipliedAlpha (slider.isEnabled() ? 1.0f : 0.3f));

        if (slider.isHorizontal())
        {
            g.fillRect (x, y + roundToInt ((float) h * 0.6f),
                        w, roundToInt ((float) h * 0.2f));
        }
        else
        {
            g.fillRect (x + roundToInt ((float) w * 0.5f - jmin (3.0f, (float) w * 0.1f)), y,
                        jmin (4, roundToInt ((float) w * 0.2f)), h);
        }

        float alpha = 0.35f;

        if (slider.isEnabled())
            alpha = slider.isMouseOverOrDragging() ? 1.0f : 0.7f;

        const Colour fill (slider.findColour (Slider::thumbColourId).withAlpha (alpha));
        const Colour outline (Colours::black.withAlpha (slider.isEnabled() ? 0.7f : 0.35f));

        if (style == Slider::TwoValueVertical || style == Slider::ThreeValueVertical)
        {
            drawTriangle (g,
                          (float) x + (float) w * 0.5f + jmin (4.0f, (float) w * 0.3f), minSliderPos,
                          (float) x + (float) w * 0.5f - jmin (8.0f, (float) w * 0.4f), minSliderPos - 7.0f,
                          (float) x + (float) w * 0.5f - jmin (8.0f, (float) w * 0.4f), minSliderPos,
                          fill, outline);

            drawTriangle (g,
                          (float) x + (float) w * 0.5f + jmin (4.0f, (float) w * 0.3f), maxSliderPos,
                          (float) x + (float) w * 0.5f - jmin (8.0f, (float) w * 0.4f), maxSliderPos,
                          (float) x + (float) w * 0.5f - jmin (8.0f, (float) w * 0.4f), maxSliderPos + 7.0f,
                          fill, outline);
        }
        else if (style == Slider::TwoValueHorizontal || style == Slider::ThreeValueHorizontal)
        {
            drawTriangle (g,
                          minSliderPos, (float) y + (float) h * 0.6f - jmin (4.0f, (float) h * 0.3f),
                          minSliderPos - 7.0f, (float) y + (float) h * 0.9f,
                          minSliderPos, (float) y + (float) h * 0.9f,
                          fill, outline);

            drawTriangle (g,
                          maxSliderPos, (float) y + (float) h * 0.6f - jmin (4.0f, (float) h * 0.3f),
                          maxSliderPos, (float) y + (float) h * 0.9f,
                          maxSliderPos + 7.0f, (float) y + (float) h * 0.9f,
                          fill, outline);
        }

        if (style == Slider::LinearHorizontal || style == Slider::ThreeValueHorizontal)
        {
            drawTriangle (g,
                          sliderPos, (float) y + (float) h * 0.9f,
                          sliderPos - 7.0f, (float) y + (float) h * 0.2f,
                          sliderPos + 7.0f, (float) y + (float) h * 0.2f,
                          fill, outline);
        }
        else if (style == Slider::LinearVertical || style == Slider::ThreeValueVertical)
        {
            drawTriangle (g,
                          (float) x + (float) w * 0.5f - jmin (4.0f, (float) w * 0.3f), sliderPos,
                          (float) x + (float) w * 0.5f + jmin (8.0f, (float) w * 0.4f), sliderPos - 7.0f,
                          (float) x + (float) w * 0.5f + jmin (8.0f, (float) w * 0.4f), sliderPos + 7.0f,
                          fill, outline);
        }
    }
}

Button* LookAndFeel_V1::createSliderButton (Slider&, const bool isIncrement)
{
    if (isIncrement)
        return new ArrowButton ("u", 0.75f, Colours::white.withAlpha (0.8f));

    return new ArrowButton ("d", 0.25f, Colours::white.withAlpha (0.8f));
}

ImageEffectFilter* LookAndFeel_V1::getSliderEffect (Slider&)
{
    return &scrollbarShadow;
}

int LookAndFeel_V1::getSliderThumbRadius (Slider&)
{
    return 8;
}

//==============================================================================
void LookAndFeel_V1::drawCornerResizer (Graphics& g, int w, int h, bool isMouseOver, bool isMouseDragging)
{
    g.setColour ((isMouseOver || isMouseDragging) ? Colours::lightgrey
                                                  : Colours::darkgrey);

    const float lineThickness = (float) jmin (w, h) * 0.1f;

    for (float i = 0.0f; i < 1.0f; i += 0.3f)
    {
        g.drawLine ((float) w * i,
                    (float) h + 1.0f,
                    (float) w + 1.0f,
                    (float) h * i,
                    lineThickness);
    }
}

//==============================================================================
Button* LookAndFeel_V1::createDocumentWindowButton (int buttonType)
{
    Path shape;

    if (buttonType == DocumentWindow::closeButton)
    {
        shape.addLineSegment (Line<float> (0.0f, 0.0f, 1.0f, 1.0f), 0.35f);
        shape.addLineSegment (Line<float> (1.0f, 0.0f, 0.0f, 1.0f), 0.35f);

        ShapeButton* const b = new ShapeButton ("close",
                                                Colour (0x7fff3333),
                                                Colour (0xd7ff3333),
                                                Colour (0xf7ff3333));

        b->setShape (shape, true, true, true);
        return b;
    }
    else if (buttonType == DocumentWindow::minimiseButton)
    {
        shape.addLineSegment (Line<float> (0.0f, 0.5f, 1.0f, 0.5f), 0.25f);

        DrawableButton* b = new DrawableButton ("minimise", DrawableButton::ImageFitted);
        DrawablePath dp;
        dp.setPath (shape);
        dp.setFill (Colours::black.withAlpha (0.3f));
        b->setImages (&dp);
        return b;
    }
    else if (buttonType == DocumentWindow::maximiseButton)
    {
        shape.addLineSegment (Line<float> (0.5f, 0.0f, 0.5f, 1.0f), 0.25f);
        shape.addLineSegment (Line<float> (0.0f, 0.5f, 1.0f, 0.5f), 0.25f);

        DrawableButton* b = new DrawableButton ("maximise", DrawableButton::ImageFitted);
        DrawablePath dp;
        dp.setPath (shape);
        dp.setFill (Colours::black.withAlpha (0.3f));
        b->setImages (&dp);
        return b;
    }

    jassertfalse;
    return nullptr;
}

void LookAndFeel_V1::positionDocumentWindowButtons (DocumentWindow&,
                                                    int titleBarX, int titleBarY, int titleBarW, int titleBarH,
                                                    Button* minimiseButton,
                                                    Button* maximiseButton,
                                                    Button* closeButton,
                                                    bool positionTitleBarButtonsOnLeft)
{
    titleBarY += titleBarH / 8;
    titleBarH -= titleBarH / 4;

    const int buttonW = titleBarH;

    int x = positionTitleBarButtonsOnLeft ? titleBarX + 4
                                          : titleBarX + titleBarW - buttonW - 4;

    if (closeButton != nullptr)
    {
        closeButton->setBounds (x, titleBarY, buttonW, titleBarH);
        x += positionTitleBarButtonsOnLeft ? buttonW + buttonW / 5
                                           : -(buttonW + buttonW / 5);
    }

    if (positionTitleBarButtonsOnLeft)
        std::swap (minimiseButton, maximiseButton);

    if (maximiseButton != nullptr)
    {
        maximiseButton->setBounds (x, titleBarY - 2, buttonW, titleBarH);
        x += positionTitleBarButtonsOnLeft ? buttonW : -buttonW;
    }

    if (minimiseButton != nullptr)
        minimiseButton->setBounds (x, titleBarY - 2, buttonW, titleBarH);
}

} // namespace juce