fergalmoran/ladybird
1
0
Fork 0
mirror of https://github.com/fergalmoran/ladybird.git synced 2026-01-05 16:14:38 +00:00
Code Issues Packages Projects Releases Wiki Activity

LibGUI: Recheck size excesses when scrollbars become visible

Browse Source 
Fixes edge cases in which hidden scrollbars could become visible
and obscure content or fail to hide when no longer needed
This commit is contained in:
thankyouverycool
2021-02-17 12:15:52 -05:00
committed by Andreas Kling
parent 8789a91a4e
commit 2df219d608
2 changed files with 23 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
Userland/Libraries/LibGUI/ScrollableWidget.cpp
View File

@@ -106,31 +106,38 @@ Gfx::IntSize ScrollableWidget::available_size() const
return { available_width, available_height };
}
void ScrollableWidget::update_scrollbar_ranges()
Gfx::IntSize ScrollableWidget::excess_size() const
{
auto available_size = this->available_size();
int excess_height = max(0, m_content_size.height() - available_size.height());
int excess_width = max(0, m_content_size.width() - available_size.width());
return { excess_width, excess_height };
}
auto vertical_initial_visibility = m_vertical_scrollbar->is_visible();
auto horizontal_initial_visibility = m_horizontal_scrollbar->is_visible();
void ScrollableWidget::update_scrollbar_ranges()
{
if (should_hide_unnecessary_scrollbars()) {
m_vertical_scrollbar->set_visible(excess_height > 0);
m_horizontal_scrollbar->set_visible(excess_width > 0);
if (excess_size().height() - height_occupied_by_horizontal_scrollbar() <= 0 && excess_size().width() - width_occupied_by_vertical_scrollbar() <= 0) {
m_horizontal_scrollbar->set_visible(false);
m_vertical_scrollbar->set_visible(false);
} else {
auto vertical_initial_visibility = m_vertical_scrollbar->is_visible();
auto horizontal_initial_visibility = m_horizontal_scrollbar->is_visible();
m_vertical_scrollbar->set_visible(excess_size().height() > 0);
m_horizontal_scrollbar->set_visible(excess_size().width() > 0);
if (m_vertical_scrollbar->is_visible() != vertical_initial_visibility)
m_horizontal_scrollbar->set_visible(excess_size().width() > 0);
if (m_horizontal_scrollbar->is_visible() != horizontal_initial_visibility)
m_vertical_scrollbar->set_visible(excess_size().height() > 0);
}
}
if (m_vertical_scrollbar->is_visible() != vertical_initial_visibility || m_horizontal_scrollbar->is_visible() != horizontal_initial_visibility) {
available_size = this->available_size();
excess_height = max(0, m_content_size.height() - available_size.height());
excess_width = max(0, m_content_size.width() - available_size.width());
}
m_horizontal_scrollbar->set_range(0, excess_width);
m_horizontal_scrollbar->set_range(0, excess_size().width());
m_horizontal_scrollbar->set_page_step(visible_content_rect().width() - m_horizontal_scrollbar->step());
m_vertical_scrollbar->set_range(0, excess_height);
m_vertical_scrollbar->set_range(0, excess_size().height());
m_vertical_scrollbar->set_page_step(visible_content_rect().height() - m_vertical_scrollbar->step());
}

1
Userland/Libraries/LibGUI/ScrollableWidget.h
View File

@@ -57,6 +57,7 @@ public:
bool is_scrollbars_enabled() const { return m_scrollbars_enabled; }
Gfx::IntSize available_size() const;
Gfx::IntSize excess_size() const;
ScrollBar& vertical_scrollbar() { return *m_vertical_scrollbar; }
const ScrollBar& vertical_scrollbar() const { return *m_vertical_scrollbar; }