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Code Issues Projects Releases Packages Wiki Activity Actions 6

GUI: Extract a ScrollBar::scroll_to_position method

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Nico Weber 2020-08-11 20:56:52 -04:00 committed by Andreas Kling
parent d1571ce00a
commit eab7712ab0
Notes: sideshowbarker 2024-07-19 03:52:38 +09:00 
Author: https://github.com/nico
Commit: https://github.com/SerenityOS/serenity/commit/eab7712ab0c
Pull-request: https://github.com/SerenityOS/serenity/pull/3102
2 changed files with 21 additions and 13 deletions
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32
Libraries/LibGUI/ScrollBar.cpp
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@ -294,19 +294,7 @@ void ScrollBar::mousedown_event(MouseEvent& event)
return;
}
float range_size = m_max - m_min;
float available = scrubbable_range_in_pixels();
float x = ::max(0, event.position().x() - button_width() - button_width() / 2);
float y = ::max(0, event.position().y() - button_height() - button_height() / 2);
float rel_x = x / available;
float rel_y = y / available;
if (orientation() == Orientation::Vertical)
set_value(m_min + rel_y * range_size);
else
set_value(m_min + rel_x * range_size);
scroll_to_position(event.position());
m_scrubbing = true;
m_scrub_start_value = value();
@ -342,6 +330,24 @@ void ScrollBar::set_automatic_scrolling_active(bool active)
}
}
void ScrollBar::scroll_to_position(const Gfx::IntPoint& position)
{
float range_size = m_max - m_min;
float available = scrubbable_range_in_pixels();
float x = ::max(0, position.x() - button_width() - button_width() / 2);
float y = ::max(0, position.y() - button_height() - button_height() / 2);
float rel_x = x / available;
float rel_y = y / available;
if (orientation() == Orientation::Vertical)
set_value(m_min + rel_y * range_size);
else
set_value(m_min + rel_x * range_size);
}
void ScrollBar::mousemove_event(MouseEvent& event)
{
auto old_hovered_component = m_hovered_component;

2
Libraries/LibGUI/ScrollBar.h
View file

@ -92,6 +92,8 @@ private:
void on_automatic_scrolling_timer_fired();
void set_automatic_scrolling_active(bool);
void scroll_to_position(const Gfx::IntPoint&);
int m_min { 0 };
int m_max { 0 };
int m_page { 0 };