ProgressBar.cpp

Go to the documentation of this file.

// ----------------------------------------------------------------------------
// -                        CloudViewer: www.cloudViewer.org                  -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.cloudViewer.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#include "visualization/gui/ProgressBar.h"
 
#include <imgui.h>
 
#include <cmath>
 
#include "visualization/gui/Theme.h"
#include "visualization/gui/Util.h"
 
namespace cloudViewer {
namespace visualization {
namespace gui {
 
struct ProgressBar::Impl {
    float value_ = 0.0f;
};
 
ProgressBar::ProgressBar() : impl_(new ProgressBar::Impl()) {}
 
ProgressBar::~ProgressBar() {}
 
void ProgressBar::SetValue(float value) { impl_->value_ = value; }
 
float ProgressBar::GetValue() const { return impl_->value_; }
 
Size ProgressBar::CalcPreferredSize(const LayoutContext& context,
                                    const Constraints& constraints) const {
    return Size(constraints.width,
                int(std::ceil(0.25 * context.theme.font_size)));
}
 
Widget::DrawResult ProgressBar::Draw(const DrawContext& context) {
    auto& frame = GetFrame();
    auto fg = context.theme.border_color;
    auto color = colorToImguiRGBA(fg);
    float rounding = frame.height / 2.0f;
    ImGui::GetWindowDrawList()->AddRect(
            ImVec2(float(frame.x), float(frame.y)),
            ImVec2(float(frame.GetRight()), float(frame.GetBottom())), color,
            rounding);
    float x = float(frame.x) + float(frame.width) * impl_->value_;
    x = std::max(x, float(frame.x + rounding));
    ImGui::GetWindowDrawList()->AddRectFilled(
            ImVec2(float(frame.x), float(frame.y)),
            ImVec2(float(x), float(frame.GetBottom())), color,
            frame.height / 2.0f);
    return DrawResult::NONE;
}
 
}  // namespace gui
}  // namespace visualization
}  // namespace cloudViewer