ui_checkbox.cpp

/*
 * Copyright (c) 2020-2021 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "components/ui_checkbox.h"
#include "default_resource/check_box_res.h"
#include "draw/draw_image.h"
#include "engines/gfx/gfx_engine_manager.h"
#include "imgdecode/cache_manager.h"

namespace OHOS {
namespace {
    constexpr uint8_t DEFAULT_UNSELECT_BG_OPA = 168; // default background opacity
    constexpr float DEFAULT_COEFFICIENT_START_DX = 0.22; // start point: x-cordinate offset
    constexpr float DEFAULT_COEFFICIENT_START_DY = 0.5; // start point: y-cordinate offset
    constexpr float DEFAULT_COEFFICIENT_MID_DX = 0.2; // middle point: y-cordinate offset
    constexpr float DEFAULT_COEFFICIENT_MID_DY = 0.38; // middle point: y-cordinate offset
    constexpr int16_t DEFAULT_RATIO_BORDER_RADIUS_LINE_WIDTH = 4;
#if DEFAULT_ANIMATION
    constexpr int16_t DEFAULT_ANIMATOR_TIME = 200;
    constexpr float BEZIER_CONTROL_POINT_X_1 = 0.33;
    constexpr float BEZIER_CONTROL_POINT_X_2 = 0.67;
#endif
}
UICheckBox::UICheckBox()
    : state_(UNSELECTED), onStateChangeListener_(nullptr), width_(DEFAULT_HOT_WIDTH), height_(DEFAULT_HOT_HEIGHT),
      borderWidth_(DEFAULT_BORDER_WIDTH), backgroundOpacity_(0)
{
    touchable_ = true;
    style_ = &(StyleDefault::GetBackgroundTransparentStyle());
    image_[UNSELECTED].SetSrc(GetCheckBoxOffInfo());
    image_[SELECTED].SetSrc(GetCheckBoxOnInfo());
    ImageHeader header = { 0 };
    image_[UNSELECTED].GetHeader(header);
    Resize(header.width, header.height);
#if DEFAULT_ANIMATION
    runTime_ = 0;
    checkBoxAnimator_ = Animator(this, this, DEFAULT_ANIMATOR_TIME, false);
#endif
}

UICheckBox::~UICheckBox()
{
#if DEFAULT_ANIMATION
    checkBoxAnimator_.Stop();
#endif
}

void UICheckBox::SetState(UICheckBoxState state)
{
    if (state_ == state) {
        return;
    }
    state_ = state;
    if ((image_[SELECTED].GetSrcType() == IMG_SRC_UNKNOWN) || (image_[UNSELECTED].GetSrcType() == IMG_SRC_UNKNOWN)) {
#if DEFAULT_ANIMATION
        checkBoxAnimator_.Start();
        ResetCallback();
#else
        backgroundOpacity_ = (state_ == SELECTED) ? OPA_OPAQUE : 0;
#endif
    }
    if (onStateChangeListener_ != nullptr) {
        onStateChangeListener_->OnChange(state);
    }
    Invalidate();
}

void UICheckBox::ReverseState()
{
    if (state_ == SELECTED) {
        SetState(UNSELECTED);
    } else {
        SetState(SELECTED);
    }
}

bool UICheckBox::OnClickEvent(const ClickEvent& event)
{
    ReverseState();
    Invalidate();
    return UIView::OnClickEvent(event);
}

void UICheckBox::SetImages(const char* selectedImageSrc, const char* unselectedImageSrc)
{
    image_[SELECTED].SetSrc(selectedImageSrc);
    image_[UNSELECTED].SetSrc(unselectedImageSrc);
}

void UICheckBox::SetImages(const ImageInfo* selectedImageSrc, const ImageInfo* unselectedImageSrc)
{
    image_[SELECTED].SetSrc(selectedImageSrc);
    image_[UNSELECTED].SetSrc(unselectedImageSrc);
}

void UICheckBox::CalculateSize()
{
    int16_t width = GetWidth();
    int16_t height = GetHeight();
    if ((width_ == width) && (height_ == height)) {
        return;
    }
    width_ = width;
    height_ = height;
    int16_t minValue = (width_ > height_) ? height_ : width_;
    borderWidth_ =  DEFAULT_BORDER_WIDTH * minValue / DEFAULT_HOT_WIDTH;
}

void UICheckBox::SelectedStateSoftwareDrawing(BufferInfo& gfxDstBuffer,
                                              Rect rect,
                                              Rect trunc,
                                              int16_t borderRadius,
                                              int16_t rectLineWidth)
{
    if (backgroundOpacity_ == 0) {
        return;
    }
    Style styleSelect = StyleDefault::GetBackgroundTransparentStyle();
    styleSelect.borderRadius_ = borderRadius;
    styleSelect.bgColor_ = Color::GetColorFromRGB(DEFAULT_BG_RED, DEFAULT_BG_GREEN, DEFAULT_BG_BLUE);
    styleSelect.bgOpa_ = backgroundOpacity_;
    BaseGfxEngine::GetInstance()->DrawRect(gfxDstBuffer, rect, trunc, styleSelect, opaScale_);
    int16_t dx = borderWidth_ * DEFAULT_COEFFICIENT_START_DX;
    int16_t dy = borderWidth_ * DEFAULT_COEFFICIENT_START_DY;
    Point start = { static_cast<int16_t>(rect.GetX() + dx), static_cast<int16_t>(rect.GetY() + dy) };
    dx = borderWidth_ * DEFAULT_COEFFICIENT_MID_DX;
    Point mid = { static_cast<int16_t>(start.x + dx), static_cast<int16_t>(start.y + dx) };
    dx = borderWidth_ * DEFAULT_COEFFICIENT_MID_DY;
    Point end = { static_cast<int16_t>(mid.x + dx), static_cast<int16_t>(mid.y - dx) };
    const int16_t half = 2; // 2 ：half
    ArcInfo arcInfoLeft = {
        start, { 0, 0 }, static_cast<uint16_t>(rectLineWidth), SEMICIRCLE_IN_DEGREE + QUARTER_IN_DEGREE / half,
        QUARTER_IN_DEGREE / half, nullptr
    };
    ArcInfo arcInfoMid = {
        mid, { 0, 0 }, static_cast<uint16_t>(rectLineWidth), SEMICIRCLE_IN_DEGREE - QUARTER_IN_DEGREE / half,
        SEMICIRCLE_IN_DEGREE + QUARTER_IN_DEGREE / half, nullptr
    };
    ArcInfo arcInfoRight = {
        end, { 0, 0 }, static_cast<uint16_t>(rectLineWidth), CIRCLE_IN_DEGREE - QUARTER_IN_DEGREE / half,
        SEMICIRCLE_IN_DEGREE - QUARTER_IN_DEGREE / half, nullptr
    };
    styleSelect.lineColor_ = Color::White();
    styleSelect.lineOpa_ = backgroundOpacity_;
    uint8_t opa = DrawUtils::GetMixOpacity(opaScale_, backgroundOpacity_);
    BaseGfxEngine::GetInstance()->DrawArc(gfxDstBuffer, arcInfoLeft, trunc, styleSelect, opaScale_, CapType::CAP_NONE);
    // 2 : double
    BaseGfxEngine::GetInstance()->DrawLine(gfxDstBuffer, start, mid, trunc, rectLineWidth * 2, Color::White(),
                                           opa);
    BaseGfxEngine::GetInstance()->DrawArc(gfxDstBuffer, arcInfoMid, trunc, styleSelect, opaScale_, CapType::CAP_NONE);
    // 2 : double
    BaseGfxEngine::GetInstance()->DrawLine(gfxDstBuffer, mid, end, trunc, rectLineWidth * 2, Color::White(),
                                           opa);
    BaseGfxEngine::GetInstance()->DrawArc(gfxDstBuffer, arcInfoRight, trunc, styleSelect, opaScale_, CapType::CAP_NONE);
}

void UICheckBox::UnSelectedStateSoftwareDrawing(BufferInfo& gfxDstBuffer,
                                                Rect rect,
                                                Rect trunc,
                                                int16_t borderRadius,
                                                int16_t rectLineWidth)
{
    Rect contentRect  = GetContentRect();
    Style styleUnSelect  = StyleDefault::GetBackgroundTransparentStyle();
    styleUnSelect.borderWidth_ = rectLineWidth;
    styleUnSelect.borderRadius_ = borderRadius;
    styleUnSelect.borderColor_ = Color::White();
    styleUnSelect.borderOpa_ = DEFAULT_UNSELECT_BG_OPA;
    BaseGfxEngine::GetInstance()->DrawRect(gfxDstBuffer, rect, trunc, styleUnSelect, opaScale_);
}

#if DEFAULT_ANIMATION
void UICheckBox::ResetCallback()
{
    if ((runTime_ != 0) && (checkBoxAnimator_.GetTime() != runTime_)) {
        checkBoxAnimator_.SetRunTime(checkBoxAnimator_.GetTime() - runTime_);
    }
}

void UICheckBox::Callback(UIView* view)
{
    runTime_ = checkBoxAnimator_.GetRunTime();
    float x = static_cast<float>(runTime_) / checkBoxAnimator_.GetTime();
    float coefficient = Interpolation::GetBezierY(x, BEZIER_CONTROL_POINT_X_1, 0, BEZIER_CONTROL_POINT_X_2, 1);
    backgroundOpacity_ = (state_ == SELECTED) ? (static_cast<uint8_t>(coefficient * OPA_OPAQUE)) :
                                                (static_cast<uint8_t>((1 - coefficient) * OPA_OPAQUE));
    Invalidate();
}

void UICheckBox::OnStop(UIView& view)
{
    backgroundOpacity_ = (state_ == SELECTED) ? OPA_OPAQUE : 0;
    Invalidate();
}
#endif

void UICheckBox::OnDraw(BufferInfo& gfxDstBuffer, const Rect& invalidatedArea)
{
    Rect trunc = invalidatedArea;
    if ((image_[SELECTED].GetSrcType() != IMG_SRC_UNKNOWN) && (image_[UNSELECTED].GetSrcType() != IMG_SRC_UNKNOWN)) {
        ImageHeader header = {0};
        image_[state_].GetHeader(header);
        int16_t imgWidth = header.width;
        int16_t imgHeight = header.height;
        Rect coords = GetContentRect();
        coords.SetWidth(imgWidth);
        coords.SetHeight(imgHeight);
        BaseGfxEngine::GetInstance()->DrawRect(gfxDstBuffer, GetRect(), invalidatedArea, *style_, opaScale_);
        int16_t offsetLeft = (GetWidth() - imgWidth) / 2; // 2 : half
        int16_t offsetTop = (GetHeight() - imgHeight) / 2; // 2 : half
        coords.SetX(coords.GetX() + offsetLeft);
        coords.SetY(coords.GetY() + offsetTop);
        if (trunc.Intersect(trunc, coords)) {
            image_[state_].DrawImage(gfxDstBuffer, coords, trunc, *style_, opaScale_);
        }
    } else {
        Rect contentRect = GetContentRect();
        bool isIntersect = trunc.Intersect(trunc, contentRect);
        if (!isIntersect) {
            return;
        }
        CalculateSize();
        int16_t rectLineWidth = borderWidth_ / DEFAULT_BORDER_WIDTH;
        int16_t borderRadius  = rectLineWidth * DEFAULT_RATIO_BORDER_RADIUS_LINE_WIDTH;
        BaseGfxEngine::GetInstance()->DrawRect(gfxDstBuffer, GetRect(), invalidatedArea, *style_, opaScale_);
        int16_t x = contentRect.GetX() + (width_ - borderWidth_) / 2; // 2: half
        int16_t y = contentRect.GetY() + (height_ - borderWidth_) / 2; // 2: half
        Rect rect(x, y, x + borderWidth_,  y + borderWidth_);
#if DEFAULT_ANIMATION
        UnSelectedStateSoftwareDrawing(gfxDstBuffer, rect, trunc, borderRadius, rectLineWidth);
        SelectedStateSoftwareDrawing(gfxDstBuffer, rect, trunc, borderRadius, rectLineWidth);
#else
        if (state_ == SELECTED) {
            SelectedStateSoftwareDrawing(gfxDstBuffer, rect, trunc, borderRadius, rectLineWidth);
        } else {
            UnSelectedStateSoftwareDrawing(gfxDstBuffer, rect, trunc, borderRadius, rectLineWidth);
        }
#endif
    }
}
} // namespace OHOS