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LibGUI: Add optional placeholder to TextEditor

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This lets you show some disabled text when no text is entered, and the
editor is not focused.
This commit is contained in:
Peter Elliott 2020-09-20 12:20:24 -07:00 • committed by Andreas Kling
parent 5b6ccbb918
commit fa96e57c15
4 changed files with 19 additions and 1 deletions
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7
Libraries/LibGUI/TextEditor.cpp
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@ -461,7 +461,12 @@ void TextEditor::paint_event(PaintEvent& event)
#ifdef DEBUG_TEXTEDITOR
painter.draw_rect(visual_line_rect, Color::Cyan);
#endif
if (!document().has_spans()) {
if (!placeholder().is_empty() && document().is_empty() && !is_focused() && line_index == 0) {
auto line_rect = visual_line_rect;
line_rect.set_width(font().width(placeholder()));
painter.draw_text(line_rect, placeholder(), m_text_alignment, palette().color(Gfx::ColorRole::DisabledText));
} else if (!document().has_spans()) {
// Fast-path for plain text
auto color = palette().color(is_enabled() ? foreground_role() : Gfx::ColorRole::DisabledText);
if (is_displayonly() && (is_focused() || has_visible_list()))