mirror of
https://github.com/RGBCube/serenity
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b7e8f32323
This adds a simple histogram widget that visualizes the rgb-channels and brightness for a given image. When hovering over the image it will indicate what brightness level the pixel at the mouse position has.
45 lines
874 B
C++
45 lines
874 B
C++
/*
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* Copyright (c) 2022, Torsten Engelmann
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include "Image.h"
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#include <LibGUI/AbstractScrollableWidget.h>
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namespace PixelPaint {
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class HistogramWidget final
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: public GUI::Frame
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, ImageClient {
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C_OBJECT(HistogramWidget);
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public:
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virtual ~HistogramWidget() override;
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void set_image(Image*);
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void image_changed();
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void set_color_at_mouseposition(Color);
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private:
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HistogramWidget();
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virtual void paint_event(GUI::PaintEvent&) override;
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ErrorOr<void> rebuild_histogram_data();
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int m_widget_height = 0;
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Color m_color_at_mouseposition = Color::Transparent;
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RefPtr<Image> m_image;
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struct HistogramData {
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Vector<int> red;
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Vector<int> green;
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Vector<int> blue;
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Vector<int> brightness;
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};
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HistogramData m_data;
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};
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}
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