LibGUI: Add ControlBoxButton to LibGUI

ControlBoxButton consolidates the paint_event for buttons
used in composite box widgets like ComboBox and SpinBox. Its
button bitmaps are built with create_from_ascii like WindowFrame
and ScrollBar controls, making theming more uniform.

Libraries/LibGUI/CMakeLists.txt

@@ -15,6 +15,7 @@ set(SOURCES
     ColumnsView.cpp
     ComboBox.cpp
     Command.cpp
+    ControlBoxButton.cpp
     CppLexer.cpp
     CppSyntaxHighlighter.cpp
     Desktop.cpp

Libraries/LibGUI/ControlBoxButton.cpp

@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2020, Charles Chaucer <thankyouverycool@github>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <LibGUI/ControlBoxButton.h>
+#include <LibGUI/Painter.h>
+#include <LibGfx/CharacterBitmap.h>
+#include <LibGfx/Palette.h>
+
+namespace GUI {
+
+static const char* s_up_arrow_bitmap_data = {
+    "         "
+    "    #    "
+    "   ###   "
+    "  #####  "
+    " ####### "
+    "         "
+};
+
+static const char* s_down_arrow_bitmap_data = {
+    "         "
+    " ####### "
+    "  #####  "
+    "   ###   "
+    "    #    "
+    "         "
+};
+
+static Gfx::CharacterBitmap* s_up_arrow_bitmap;
+static Gfx::CharacterBitmap* s_down_arrow_bitmap;
+static const int s_bitmap_width = 9;
+static const int s_bitmap_height = 6;
+
+ControlBoxButton::ControlBoxButton(Type type)
+    : m_type(type)
+{
+}
+
+ControlBoxButton::~ControlBoxButton()
+{
+}
+
+void ControlBoxButton::paint_event(PaintEvent& event)
+{
+    Painter painter(*this);
+    painter.add_clip_rect(event.rect());
+
+    Gfx::StylePainter::paint_button(painter, rect(), palette(), Gfx::ButtonStyle::Normal, is_being_pressed(), is_hovered(), is_checked(), is_enabled());
+
+    auto button_location = rect().location().translated((width() - s_bitmap_width) / 2, (height() - s_bitmap_height) / 2);
+
+    if (is_being_pressed())
+        button_location.move_by(1, 1);
+
+    if (type() == UpArrow) {
+        if (!s_up_arrow_bitmap)
+            s_up_arrow_bitmap = &Gfx::CharacterBitmap::create_from_ascii(s_up_arrow_bitmap_data, s_bitmap_width, s_bitmap_height).leak_ref();
+        painter.draw_bitmap(button_location, *s_up_arrow_bitmap, is_enabled() ? palette().button_text() : palette().threed_shadow1());
+    } else {
+        if (!s_down_arrow_bitmap)
+            s_down_arrow_bitmap = &Gfx::CharacterBitmap::create_from_ascii(s_down_arrow_bitmap_data, s_bitmap_width, s_bitmap_height).leak_ref();
+        painter.draw_bitmap(button_location, *s_down_arrow_bitmap, is_enabled() ? palette().button_text() : palette().threed_shadow1());
+    }
+}
+
+}

Libraries/LibGUI/ControlBoxButton.h

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2020, Charles Chaucer <thankyouverycool@github>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#pragma once
+
+#include <LibGUI/Button.h>
+
+namespace GUI {
+
+class ControlBoxButton final : public Button {
+    C_OBJECT(ControlBoxButton);
+
+public:
+    enum Type {
+        UpArrow,
+        DownArrow
+    };
+
+    virtual ~ControlBoxButton() override;
+
+private:
+    explicit ControlBoxButton(const Type type);
+    virtual void paint_event(PaintEvent& event) override;
+
+    Type m_type { DownArrow };
+    Type type() const { return m_type; }
+};
+
+}