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https://github.com/RGBCube/serenity
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PDFViewer: Take the mousewheel delta into account for scrolling
We now respect the system-wide setting for scroll speed, where we would previously use a fixed step.
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parent
9b1331a984
commit
0308300b78
1 changed files with 5 additions and 4 deletions
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@ -189,14 +189,15 @@ void PDFViewer::mousewheel_event(GUI::MouseEvent& event)
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}
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}
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auto& scrollbar = event.shift() ? horizontal_scrollbar() : vertical_scrollbar();
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auto& scrollbar = event.shift() ? horizontal_scrollbar() : vertical_scrollbar();
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auto delta = abs(event.wheel_delta_y() * 20);
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if (m_page_view_mode == PageViewMode::Multiple) {
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if (m_page_view_mode == PageViewMode::Multiple) {
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if (scrolled_down) {
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if (scrolled_down) {
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if (scrollbar.value() != scrollbar.max())
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if (scrollbar.value() != scrollbar.max())
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scrollbar.increase_slider_by(20);
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scrollbar.increase_slider_by(delta);
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} else {
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} else {
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if (scrollbar.value() > 0)
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if (scrollbar.value() > 0)
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scrollbar.decrease_slider_by(20);
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scrollbar.decrease_slider_by(delta);
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}
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}
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} else {
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} else {
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if (scrolled_down) {
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if (scrolled_down) {
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@ -206,7 +207,7 @@ void PDFViewer::mousewheel_event(GUI::MouseEvent& event)
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scrollbar.set_value(0);
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scrollbar.set_value(0);
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}
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}
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} else {
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} else {
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scrollbar.increase_slider_by(20);
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scrollbar.increase_slider_by(delta);
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}
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}
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} else {
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} else {
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if (scrollbar.value() == 0) {
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if (scrollbar.value() == 0) {
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@ -215,7 +216,7 @@ void PDFViewer::mousewheel_event(GUI::MouseEvent& event)
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scrollbar.set_value(scrollbar.max());
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scrollbar.set_value(scrollbar.max());
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}
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}
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} else {
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} else {
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scrollbar.decrease_slider_by(20);
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scrollbar.decrease_slider_by(delta);
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}
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}
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}
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}
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}
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}
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