3 files changed, 88 insertions, 0 deletions
diff --git a/LibGUI/GProgressBar.cpp b/LibGUI/GProgressBar.cpp
new file mode 100644
index 0000000000..b92dc5c3bf
--- /dev/null
+++ b/LibGUI/GProgressBar.cpp
@@ -0,0 +1,65 @@
+#include <LibGUI/GProgressBar.h>
+#include <SharedGraphics/Painter.h>
+
+GProgressBar::GProgressBar(GWidget* parent)
+    : GWidget(parent)
+{
+    start_timer(10);
+}
+
+GProgressBar::~GProgressBar()
+{
+}
+
+void GProgressBar::set_value(int value)
+{
+    if (m_value == value)
+        return;
+    m_value = value;
+    update();
+}
+
+void GProgressBar::set_range(int min, int max)
+{
+    ASSERT(min < max);
+    m_min = min;
+    m_max = max;
+    if (m_value > m_max)
+        m_value = m_max;
+    if (m_value < m_min)
+        m_value = m_min;
+}
+
+void GProgressBar::paint_event(GPaintEvent& event)
+{
+    Painter painter(*this);
+    painter.set_clip_rect(event.rect());
+
+    // First we fill the entire widget with the gradient. This incurs a bit of
+    // overdraw but ensures a consistent look throughout the progression.
+    Color start_color(110, 34, 9);
+    Color end_color(244, 202, 158);
+    painter.fill_rect_with_gradient(rect(), start_color, end_color);
+
+    float range_size = m_max - m_min;
+    float progress = (m_value - m_min) / range_size;
+
+    // Then we draw the progress text over the gradient.
+    // We draw it twice, once offset (1, 1) for a drop shadow look.
+    auto progress_text = String::format("%d%%", (int)(progress * 100));
+    painter.draw_text(rect().translated(1, 1), progress_text, TextAlignment::Center, Color::Black);
+    painter.draw_text(rect(), progress_text, TextAlignment::Center, Color::White);
+
+    // Then we carve out a hole in the remaining part of the widget.
+    // We draw the text a third time, clipped and inverse, for sharp contrast.
+    painter.save();
+    float progress_width = progress * width();
+    Rect hole_rect { (int)progress_width, 0, (int)(width() - progress_width), height() };
+    painter.set_clip_rect(hole_rect);
+    painter.fill_rect(hole_rect, Color::White);
+    painter.draw_text(rect().translated(0, 0), progress_text, TextAlignment::Center, Color::Black);
+    painter.restore();
+
+    // Finally, draw a frame around the widget.
+    painter.draw_rect(rect(), Color::Black);
+}
diff --git a/LibGUI/GProgressBar.h b/LibGUI/GProgressBar.h
new file mode 100644
index 0000000000..6768e28871
--- /dev/null
+++ b/LibGUI/GProgressBar.h
@@ -0,0 +1,22 @@
+#pragma once
+
+#include <LibGUI/GWidget.h>
+
+class GProgressBar : public GWidget {
+public:
+    explicit GProgressBar(GWidget* parent);
+    virtual ~GProgressBar() override;
+
+    void set_range(int min, int max);
+    void set_value(int);
+
+    int value() const { return m_value; }
+
+protected:
+    virtual void paint_event(GPaintEvent&) override;
+
+private:
+    int m_min { 0 };
+    int m_max { 100 };
+    int m_value { 0 };
+};
diff --git a/LibGUI/Makefile b/LibGUI/Makefile
index c0f6398669..5cf1c4abeb 100644
--- a/LibGUI/Makefile
+++ b/LibGUI/Makefile
@@ -47,6 +47,7 @@ LIBGUI_OBJS = \
     GInputBox.o \
     GDialog.o \
     GDesktop.o \
+    GProgressBar.o \
     GWindow.o
 
 OBJS = $(SHAREDGRAPHICS_OBJS) $(LIBGUI_OBJS)