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PDFViewer: Add zoom in/out/reset menu actions

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Make PDFViewer::zoom_in() & ::zoom_out() public and add menu and toolbar
actions. Also add an action for zoom reset.
This commit is contained in:
Marcus Nilsson 2022-01-02 21:58:51 +01:00 committed by Andreas Kling
parent 45085122ee
commit 3af71c406d
Notes: sideshowbarker 2024-07-17 21:32:28 +09:00 
Author: https://github.com/metmo
Commit: https://github.com/SerenityOS/serenity/commit/3af71c406d1
Pull-request: https://github.com/SerenityOS/serenity/pull/11653
4 changed files with 50 additions and 8 deletions
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17
Userland/Applications/PDFViewer/PDFViewer.cpp
View File

@ -109,9 +109,8 @@ void PDFViewer::mousewheel_event(GUI::MouseEvent& event)
scrollbar.decrease_slider_by(20);
}
}
update();
}
update();
}
void PDFViewer::timer_event(Core::TimerEvent&)
@ -125,14 +124,24 @@ void PDFViewer::timer_event(Core::TimerEvent&)
void PDFViewer::zoom_in()
{
if (m_zoom_level < number_of_zoom_levels - 1)
if (m_zoom_level < number_of_zoom_levels - 1) {
m_zoom_level++;
update();
}
}
void PDFViewer::zoom_out()
{
if (m_zoom_level > 0)
if (m_zoom_level > 0) {
m_zoom_level--;
update();
}
}
void PDFViewer::reset_zoom()
{
m_zoom_level = initial_zoom_level;
update();
}
RefPtr<Gfx::Bitmap> PDFViewer::render_page(const PDF::Page& page)

7
Userland/Applications/PDFViewer/PDFViewer.h
View File

@ -49,6 +49,10 @@ public:
Function<void(u32 new_page)> on_page_change;
void zoom_in();
void zoom_out();
void reset_zoom();
protected:
PDFViewer();
@ -60,9 +64,6 @@ private:
RefPtr<Gfx::Bitmap> get_rendered_page(u32 index);
RefPtr<Gfx::Bitmap> render_page(const PDF::Page&);
void zoom_in();
void zoom_out();
RefPtr<PDF::Document> m_document;
u32 m_current_page_index { 0 };
Vector<HashMap<u32, RefPtr<Gfx::Bitmap>>> m_rendered_page_list;

30
Userland/Applications/PDFViewer/PDFViewerWidget.cpp
View File

@ -58,6 +58,10 @@ void PDFViewerWidget::initialize_menubar(GUI::Window& window)
auto& view_menu = window.add_menu("&View");
view_menu.add_action(*m_toggle_sidebar_action);
view_menu.add_separator();
view_menu.add_action(*m_zoom_in_action);
view_menu.add_action(*m_zoom_out_action);
view_menu.add_action(*m_reset_zoom_action);
auto& help_menu = window.add_menu("&Help");
help_menu.add_action(GUI::CommonActions::make_about_action("PDF Viewer", GUI::Icon::default_icon("app-pdf-viewer"), &window));
@ -111,6 +115,28 @@ void PDFViewerWidget::create_toolbar()
};
m_total_page_label = toolbar.add<GUI::Label>();
m_total_page_label->set_fixed_width(30);
toolbar.add_separator();
m_zoom_in_action = GUI::CommonActions::make_zoom_in_action([&](auto&) {
m_viewer->zoom_in();
});
m_zoom_out_action = GUI::CommonActions::make_zoom_out_action([&](auto&) {
m_viewer->zoom_out();
});
m_reset_zoom_action = GUI::CommonActions::make_reset_zoom_action([&](auto&) {
m_viewer->reset_zoom();
});
m_zoom_in_action->set_enabled(false);
m_zoom_out_action->set_enabled(false);
m_reset_zoom_action->set_enabled(false);
toolbar.add_action(*m_zoom_in_action);
toolbar.add_action(*m_zoom_out_action);
toolbar.add_action(*m_reset_zoom_action);
}
void PDFViewerWidget::open_file(int fd, String const& path)
@ -131,7 +157,6 @@ void PDFViewerWidget::open_file(int fd, String const& path)
m_viewer->set_document(document);
m_total_page_label->set_text(String::formatted("of {}", document->get_page_count()));
m_total_page_label->set_fixed_width(30);
m_page_text_box->set_enabled(true);
m_page_text_box->set_current_number(1, false);
@ -139,6 +164,9 @@ void PDFViewerWidget::open_file(int fd, String const& path)
m_go_to_prev_page_action->set_enabled(false);
m_go_to_next_page_action->set_enabled(document->get_page_count() > 1);
m_toggle_sidebar_action->set_enabled(true);
m_zoom_in_action->set_enabled(true);
m_zoom_out_action->set_enabled(true);
m_reset_zoom_action->set_enabled(true);
if (document->outline()) {
auto outline = document->outline();

4
Userland/Applications/PDFViewer/PDFViewerWidget.h
View File

@ -35,6 +35,10 @@ private:
RefPtr<GUI::Action> m_go_to_prev_page_action;
RefPtr<GUI::Action> m_go_to_next_page_action;
RefPtr<GUI::Action> m_toggle_sidebar_action;
RefPtr<GUI::Action> m_zoom_in_action;
RefPtr<GUI::Action> m_zoom_out_action;
RefPtr<GUI::Action> m_reset_zoom_action;
bool m_sidebar_open { false };
ByteBuffer m_buffer;
};