LibGUI: Dynamically resize editing content rect in IconView

This makes IconView aware of the text width of the
ModelEditingDelegate widget when editing an index and allows us to
resize the content rect as needed.

This also removes the border from the textbox since it could collide
with the icon in ColumnsView. While editing we also skip painting the
inactive selection rect since it would otherwise show when the content
rect gets smaller.

Userland/Libraries/LibGUI/AbstractView.cpp

@@ -160,6 +160,9 @@ void AbstractView::begin_editing(const ModelIndex& index)
         VERIFY(model());
         stop_editing();
     };
+    m_editing_delegate->on_change = [this, index] {
+        editing_widget_did_change(index);
+    };
 }
 
 void AbstractView::stop_editing()
@@ -670,6 +673,9 @@ bool AbstractView::is_highlighting_searching(const ModelIndex& index) const
 
 void AbstractView::draw_item_text(Gfx::Painter& painter, const ModelIndex& index, bool is_selected, const Gfx::IntRect& text_rect, const StringView& item_text, const Gfx::Font& font, Gfx::TextAlignment alignment, Gfx::TextElision elision, size_t search_highlighting_offset)
 {
+    if (m_edit_index == index)
+        return;
+
     Color text_color;
     if (is_selected)
         text_color = is_focused() ? palette().selection_text() : palette().inactive_selection_text();

Userland/Libraries/LibGUI/AbstractView.h

@@ -152,6 +152,7 @@ protected:
     virtual void toggle_selection(const ModelIndex&);
     virtual void did_change_hovered_index([[maybe_unused]] const ModelIndex& old_index, [[maybe_unused]] const ModelIndex& new_index) { }
     virtual void did_change_cursor_index([[maybe_unused]] const ModelIndex& old_index, [[maybe_unused]] const ModelIndex& new_index) { }
+    virtual void editing_widget_did_change([[maybe_unused]] const ModelIndex& index) { }
 
     void draw_item_text(Gfx::Painter&, const ModelIndex&, bool, const Gfx::IntRect&, const StringView&, const Gfx::Font&, Gfx::TextAlignment, Gfx::TextElision, size_t search_highlighting_offset = 0);
 

Userland/Libraries/LibGUI/ColumnsView.cpp

@@ -105,7 +105,9 @@ void ColumnsView::paint_event(PaintEvent& event)
             }
 
             Gfx::IntRect row_rect { column_x, row * item_height(), column.width, item_height() };
-            painter.fill_rect(row_rect, background_color);
+
+            if (m_edit_index.row() != row)
+                painter.fill_rect(row_rect, background_color);
 
             auto icon = index.data(ModelRole::Icon);
             Gfx::IntRect icon_rect = { column_x + icon_spacing(), 0, icon_size(), icon_size() };

Userland/Libraries/LibGUI/IconView.cpp

@@ -8,8 +8,10 @@
 #include <LibCore/Timer.h>
 #include <LibGUI/IconView.h>
 #include <LibGUI/Model.h>
+#include <LibGUI/ModelEditingDelegate.h>
 #include <LibGUI/Painter.h>
 #include <LibGUI/Scrollbar.h>
+
 #include <LibGfx/Palette.h>
 
 REGISTER_WIDGET(GUI, IconView);
@@ -401,10 +403,24 @@ Gfx::IntRect IconView::editing_rect(ModelIndex const& index) const
     if (!index.is_valid())
         return {};
     auto& item_data = get_item_data(index.row());
-    return item_data.text_rect.inflated(4, 4);
+    auto editing_rect = item_data.text_rect;
+    editing_rect.set_height(font_for_index(index)->glyph_height() + 8);
+    editing_rect.set_y(item_data.text_rect.y() - 2);
+    return editing_rect;
+}
+
+void IconView::editing_widget_did_change(const ModelIndex& index)
+{
+    if (m_editing_delegate->value().is_string()) {
+        auto text_width = font_for_index(index)->width(m_editing_delegate->value().as_string());
+        m_edit_widget_content_rect.set_width(min(text_width + 8, effective_item_size().width()));
+        m_edit_widget_content_rect.center_horizontally_within(editing_rect(index).translated(frame_thickness(), frame_thickness()));
+        update_edit_widget_position();
+    }
 }
 
-Gfx::IntRect IconView::paint_invalidation_rect(const ModelIndex& index) const
+Gfx::IntRect
+IconView::paint_invalidation_rect(const ModelIndex& index) const
 {
     if (!index.is_valid())
         return {};
@@ -548,7 +564,8 @@ void IconView::paint_event(PaintEvent& event)
 
         const auto& text_rect = item_data.text_rect;
 
-        painter.fill_rect(text_rect, background_color);
+        if (m_edit_index != item_data.index)
+            painter.fill_rect(text_rect, background_color);
 
         if (is_focused() && item_data.index == cursor_index()) {
             painter.draw_rect(text_rect, widget_background_color);

Userland/Libraries/LibGUI/IconView.h

@@ -57,6 +57,7 @@ private:
     virtual void mouseup_event(MouseEvent&) override;
     virtual void did_change_hovered_index(const ModelIndex& old_index, const ModelIndex& new_index) override;
     virtual void did_change_cursor_index(const ModelIndex& old_index, const ModelIndex& new_index) override;
+    virtual void editing_widget_did_change(const ModelIndex& index) override;
 
     virtual void move_cursor(CursorMovement, SelectionUpdate) override;
 

Userland/Libraries/LibGUI/ModelEditingDelegate.h

@@ -35,6 +35,7 @@ public:
 
     Function<void()> on_commit;
     Function<void()> on_rollback;
+    Function<void()> on_change;
 
     virtual Variant value() const = 0;
     virtual void set_value(Variant const&, SelectionBehavior selection_behavior = SelectionBehavior::SelectAll) = 0;
@@ -55,6 +56,11 @@ protected:
         if (on_rollback)
             on_rollback();
     }
+    void change()
+    {
+        if (on_change)
+            on_change();
+    }
 
     const ModelIndex& index() const { return m_index; }
 
@@ -72,12 +78,17 @@ public:
     virtual RefPtr<Widget> create_widget() override
     {
         auto textbox = TextBox::construct();
+        textbox->set_frame_shape(Gfx::FrameShape::NoFrame);
+
         textbox->on_return_pressed = [this] {
             commit();
         };
         textbox->on_escape_pressed = [this] {
             rollback();
         };
+        textbox->on_change = [this] {
+            change();
+        };
         return textbox;
     }
     virtual Variant value() const override { return static_cast<const TextBox*>(widget())->text(); }