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Code Issues Projects Releases Packages Wiki Activity Actions 9

Make a preparation pass for variable-width fonts.

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This commit is contained in:
Andreas Kling 2019-03-06 11:03:10 +01:00
parent b85fe0bd07
commit 0a86366c71
Notes: sideshowbarker 2024-07-19 15:10:08 +09:00
9 changed files with 72 additions and 32 deletions
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17
LibGUI/GTextBox.cpp
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@ -26,6 +26,7 @@ void GTextBox::set_text(const String& text)
void GTextBox::paint_event(GPaintEvent& event)
{
ASSERT(font().is_fixed_width());
Painter painter(*this);
painter.set_clip_rect(event.rect());
@ -38,23 +39,27 @@ void GTextBox::paint_event(GPaintEvent& event)
Rect inner_rect = rect();
inner_rect.shrink(6, 6);
ssize_t max_chars_to_paint = inner_rect.width() / font().glyph_width();
ssize_t max_chars_to_paint = inner_rect.width() / font().min_glyph_width();
int first_visible_char = max((int)m_cursor_position - (int)max_chars_to_paint, 0);
ssize_t chars_to_paint = min(m_text.length() - first_visible_char, max_chars_to_paint);
int y = inner_rect.center().y() - font().glyph_height() / 2;
int space_width = font().glyph_width(' ');
int x = inner_rect.x();
int y = inner_rect.center().y() - font().glyph_height() / 2;
for (ssize_t i = 0; i < chars_to_paint; ++i) {
char ch = m_text[first_visible_char + i];
if (ch == ' ')
if (ch == ' ') {
x += space_width;
continue;
int x = inner_rect.x() + (i * font().glyph_width());
}
painter.draw_glyph({x, y}, ch, Color::Black);
x += font().glyph_width(ch);
}
if (is_focused() && m_cursor_blink_state) {
unsigned visible_cursor_position = m_cursor_position - first_visible_char;
Rect cursor_rect(inner_rect.x() + visible_cursor_position * font().glyph_width(), inner_rect.y(), 1, inner_rect.height());
int visible_cursor_position = m_cursor_position - first_visible_char;
Rect cursor_rect(inner_rect.x() + visible_cursor_position * font().glyph_width('x'), inner_rect.y(), 1, inner_rect.height());
painter.fill_rect(cursor_rect, foreground_color());
}
}