[graphics/drawy/gsoc2026] src/gui: feat: expand text box according to alignment direction

Git commit a32e652fd8c14ce3c02513caa36178bd120f0f57 by Abdelhadi Wael.
Committed on 16/07/2026 at 07:57.
Pushed by mlaurent into branch 'gsoc2026'.

feat: expand text box according to alignment direction

- if it is right aligned we expand to left
- if it is center aligned we expand to both left and right

M  +21   -1    src/gui/item/text.cpp
M  +1    -0    src/gui/item/text.hpp
M  +3    -0    src/gui/serializer/textdeserializer.cpp

https://invent.kde.org/graphics/drawy/-/commit/a32e652fd8c14ce3c02513caa36178bd120f0f57

diff --git a/src/gui/item/text.cpp b/src/gui/item/text.cpp
index e50092ca..b1b745c7 100644
--- a/src/gui/item/text.cpp
+++ b/src/gui/item/text.cpp
@@ -60,6 +60,12 @@ void TextItem::createTextBox(const QPointF position)
     setDirty(true);
 }
 
+void TextItem::setBoundingBoxTopLeft(const QPointF &topLeft)
+{
+    m_boundingBox.moveTopLeft(topLeft);
+    setDirty(true);
+}
+
 bool TextItem::intersects(const QRectF &rect)
 {
     return m_transform.map(m_boundingBox).intersects(rect);
@@ -239,7 +245,21 @@ void TextItem::updateBoundingBox()
         }
     }
 
-    m_boundingBox.setSize(m_document.size());
+    const auto oldSize = m_boundingBox.size();
+    const auto newSize = m_document.size();
+    if (oldSize != newSize) {
+        const qreal diff = newSize.width() - oldSize.width();
+        const int alignment = m_cursor.blockFormat().alignment();
+
+        auto topLeft = m_boundingBox.topLeft();
+        if (alignment & Qt::AlignRight) {
+            topLeft.setX(topLeft.x() - diff);
+        } else if (alignment & Qt::AlignCenter) {
+            topLeft.setX(topLeft.x() - (diff / 2.0));
+        }
+        m_boundingBox.moveTopLeft(topLeft);
+        m_boundingBox.setSize(newSize);
+    }
     setDirty(true);
 }
 
diff --git a/src/gui/item/text.hpp b/src/gui/item/text.hpp
index 1057e2d7..13ec2ddc 100644
--- a/src/gui/item/text.hpp
+++ b/src/gui/item/text.hpp
@@ -30,6 +30,7 @@ public:
     [[nodiscard]] bool lockAspectRatioWhenResizing() const override;
 
     void createTextBox(const QPointF position);
+    void setBoundingBoxTopLeft(const QPointF &topLeft);
 
     void setWrapWidth(qreal wrapWidth);
     [[nodiscard]] qreal wrapWidth() const;
diff --git a/src/gui/serializer/textdeserializer.cpp b/src/gui/serializer/textdeserializer.cpp
index 5be6f21c..ed5c8966 100644
--- a/src/gui/serializer/textdeserializer.cpp
+++ b/src/gui/serializer/textdeserializer.cpp
@@ -30,4 +30,7 @@ void TextDeserializer::deserialize(const QJsonObject &obj)
     } else {
         textItem->cursor().insertText(text);
     }
+
+    // cancel any shift that occurred due to alignment expansion logic
+    textItem->setBoundingBoxTopLeft(topLeft);
 }