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Code Issues Activity Actions

PDFViewer: Take the mousewheel delta into account for scrolling

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We now respect the system-wide setting for scroll speed, where we would
previously use a fixed step.
This commit is contained in:
Julian Offenhäuser 2022-10-27 19:50:00 +02:00 • committed by Andreas Kling
parent 9b1331a984
commit 0308300b78
1 changed files with 5 additions and 4 deletions
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9
Userland/Applications/PDFViewer/PDFViewer.cpp
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@ -189,14 +189,15 @@ void PDFViewer::mousewheel_event(GUI::MouseEvent& event)
} }
auto& scrollbar = event.shift() ? horizontal_scrollbar() : vertical_scrollbar(); auto& scrollbar = event.shift() ? horizontal_scrollbar() : vertical_scrollbar();
auto delta = abs(event.wheel_delta_y() * 20);
if (m_page_view_mode == PageViewMode::Multiple) { if (m_page_view_mode == PageViewMode::Multiple) {
if (scrolled_down) { if (scrolled_down) {
if (scrollbar.value() != scrollbar.max()) if (scrollbar.value() != scrollbar.max())
scrollbar.increase_slider_by(20); scrollbar.increase_slider_by(delta);
} else { } else {
if (scrollbar.value() > 0) if (scrollbar.value() > 0)
scrollbar.decrease_slider_by(20); scrollbar.decrease_slider_by(delta);
} }
} else { } else {
if (scrolled_down) { if (scrolled_down) {
@ -206,7 +207,7 @@ void PDFViewer::mousewheel_event(GUI::MouseEvent& event)
scrollbar.set_value(0); scrollbar.set_value(0);
} }
} else { } else {
scrollbar.increase_slider_by(20); scrollbar.increase_slider_by(delta);
} }
} else { } else {
if (scrollbar.value() == 0) { if (scrollbar.value() == 0) {
@ -215,7 +216,7 @@ void PDFViewer::mousewheel_event(GUI::MouseEvent& event)
scrollbar.set_value(scrollbar.max()); scrollbar.set_value(scrollbar.max());
} }
} else { } else {
scrollbar.decrease_slider_by(20); scrollbar.decrease_slider_by(delta);
} }
} }
} }