Label.cpp 2.9 KB

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  1. /*
  2. * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
  3. *
  4. * SPDX-License-Identifier: BSD-2-Clause
  5. */
  6. #include <AK/Utf8View.h>
  7. #include <LibGUI/Label.h>
  8. #include <LibGUI/Painter.h>
  9. #include <LibGfx/Bitmap.h>
  10. #include <LibGfx/Font.h>
  11. #include <LibGfx/Palette.h>
  12. #include <LibGfx/TextLayout.h>
  13. #include <LibGfx/TextWrapping.h>
  14. REGISTER_WIDGET(GUI, Label)
  15. namespace GUI {
  16. Label::Label(String text)
  17. : m_text(move(text))
  18. {
  19. REGISTER_TEXT_ALIGNMENT_PROPERTY("text_alignment", text_alignment, set_text_alignment);
  20. REGISTER_TEXT_WRAPPING_PROPERTY("text_wrapping", text_wrapping, set_text_wrapping);
  21. set_frame_thickness(0);
  22. set_frame_shadow(Gfx::FrameShadow::Plain);
  23. set_frame_shape(Gfx::FrameShape::NoFrame);
  24. set_foreground_role(Gfx::ColorRole::WindowText);
  25. REGISTER_STRING_PROPERTY("text", text, set_text);
  26. REGISTER_BOOL_PROPERTY("autosize", is_autosize, set_autosize);
  27. }
  28. Label::~Label()
  29. {
  30. }
  31. void Label::set_autosize(bool autosize)
  32. {
  33. if (m_autosize == autosize)
  34. return;
  35. m_autosize = autosize;
  36. if (m_autosize)
  37. size_to_fit();
  38. }
  39. void Label::set_icon(const Gfx::Bitmap* icon)
  40. {
  41. if (m_icon == icon)
  42. return;
  43. m_icon = icon;
  44. update();
  45. }
  46. void Label::set_text(String text)
  47. {
  48. if (text == m_text)
  49. return;
  50. m_text = move(text);
  51. if (m_autosize)
  52. size_to_fit();
  53. update();
  54. did_change_text();
  55. }
  56. Gfx::IntRect Label::text_rect() const
  57. {
  58. return frame_inner_rect().shrunken(frame_thickness() > 0 ? font().glyph_width('x') : 0, 0);
  59. }
  60. void Label::paint_event(PaintEvent& event)
  61. {
  62. Frame::paint_event(event);
  63. Painter painter(*this);
  64. painter.add_clip_rect(event.rect());
  65. if (m_icon) {
  66. if (m_should_stretch_icon) {
  67. painter.draw_scaled_bitmap(frame_inner_rect(), *m_icon, m_icon->rect());
  68. } else {
  69. auto icon_location = frame_inner_rect().center().translated(-(m_icon->width() / 2), -(m_icon->height() / 2));
  70. painter.blit(icon_location, *m_icon, m_icon->rect());
  71. }
  72. }
  73. if (text().is_empty())
  74. return;
  75. auto text_rect = this->text_rect();
  76. if (is_enabled()) {
  77. painter.draw_text(text_rect, text(), text_alignment(), palette().color(foreground_role()), Gfx::TextElision::Right, text_wrapping());
  78. } else {
  79. painter.draw_text(text_rect.translated(1, 1), text(), font(), text_alignment(), Color::White, Gfx::TextElision::Right, text_wrapping());
  80. painter.draw_text(text_rect, text(), font(), text_alignment(), Color::from_rgb(0x808080), Gfx::TextElision::Right, text_wrapping());
  81. }
  82. }
  83. void Label::size_to_fit()
  84. {
  85. set_fixed_width(font().width(m_text));
  86. }
  87. int Label::preferred_height() const
  88. {
  89. // FIXME: The 4 is taken from Gfx::Painter and should be available as
  90. // a constant instead.
  91. return Gfx::TextLayout(&font(), Utf8View { m_text }, text_rect()).bounding_rect(Gfx::TextWrapping::Wrap, 4).height();
  92. }
  93. }