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ThemeEditor: Make GUI initialization fallible

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To do this, all GUI logic is moved into try_create() factory functions.
This commit is contained in:
Sam Atkins 2022-12-30 12:13:23 +00:00 • committed by Tim Flynn
parent fa98034ff7
commit 59d9d1d07a
4 changed files with 78 additions and 47 deletions
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33
Userland/Applications/ThemeEditor/PreviewWidget.cpp
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@ -23,9 +23,22 @@ REGISTER_WIDGET(ThemeEditor, PreviewWidget);
namespace ThemeEditor {
class MiniWidgetGallery final : public GUI::Widget {
C_OBJECT(MiniWidgetGallery);
C_OBJECT_ABSTRACT(MiniWidgetGallery);
public:
static ErrorOr<NonnullRefPtr<MiniWidgetGallery>> try_create()
{
auto gallery = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) MiniWidgetGallery()));
TRY(gallery->try_load_from_gml(window_preview_gml));
gallery->for_each_child_widget([](auto& child) {
child.set_focus_policy(GUI::FocusPolicy::NoFocus);
return IterationDecision::Continue;
});
return gallery;
}
void set_preview_palette(Gfx::Palette const& palette)
{
set_palette(palette);
@ -42,19 +55,19 @@ public:
private:
MiniWidgetGallery()
{
load_from_gml(window_preview_gml);
for_each_child_widget([](auto& child) {
child.set_focus_policy(GUI::FocusPolicy::NoFocus);
return IterationDecision::Continue;
});
}
};
PreviewWidget::PreviewWidget(Gfx::Palette const& initial_preview_palette)
: GUI::AbstractThemePreview(initial_preview_palette)
ErrorOr<NonnullRefPtr<PreviewWidget>> PreviewWidget::try_create()
{
auto preview_widget = TRY(adopt_nonnull_ref_or_enomem(new (nothrow) PreviewWidget()));
preview_widget->m_gallery = TRY(preview_widget->try_add<MiniWidgetGallery>());
return preview_widget;
}
PreviewWidget::PreviewWidget()
: GUI::AbstractThemePreview(GUI::Application::the()->palette())
{
m_gallery = add<MiniWidgetGallery>();
set_greedy_for_hits(true);
}