redesign layout dimension change window

include/ui/movablerect.h

@@ -5,12 +5,13 @@
 #include <QPainter>
 #include <QRgb>
 
-class MovableRect : public QGraphicsItem
+
+
+class MovableRect : public QGraphicsRectItem
 {
 public:
     MovableRect(bool *enabled, int width, int height, QRgb color);
-    QRectF boundingRect() const override
-    {
+    QRectF boundingRect() const override {
         qreal penWidth = 4;
         return QRectF(-penWidth,
                       -penWidth,
@@ -18,21 +19,62 @@ public:
                       20 * 8 + penWidth * 2);
     }
 
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *) override
-    {
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *) override {
         if (!(*enabled)) return;
         painter->setPen(this->color);
-        painter->drawRect(x() - 2, y() - 2, this->width + 3, this->height + 3);
+        painter->drawRect(this->rect().x() - 2, this->rect().y() - 2, this->rect().width() + 3, this->rect().height() + 3);
         painter->setPen(QColor(0, 0, 0));
-        painter->drawRect(x() - 3, y() - 3, this->width + 5, this->height + 5);
-        painter->drawRect(x() - 1, y() - 1, this->width + 1, this->height + 1);
+        painter->drawRect(this->rect().x() - 3, this->rect().y() - 3, this->rect().width() + 5, this->rect().height() + 5);
+        painter->drawRect(this->rect().x() - 1, this->rect().y() - 1, this->rect().width() + 1, this->rect().height() + 1);
     }
     void updateLocation(int x, int y);
     bool *enabled;
-private:
-    int width;
-    int height;
+
+protected:
     QRgb color;
 };
 
+
+
+/// A MovableRect with the addition of being resizable.
+class ResizableRect : public QObject, public MovableRect
+{
+    Q_OBJECT
+public:
+    ResizableRect(QObject *parent, bool *enabled, int width, int height, QRgb color);
+
+    QRectF boundingRect() const override {
+        return QRectF(this->rect() + QMargins(lineWidth, lineWidth, lineWidth, lineWidth));
+    }
+
+    QPainterPath shape() const override {
+        QPainterPath path;
+        path.addRect(this->rect() + QMargins(lineWidth, lineWidth, lineWidth, lineWidth));
+        path.addRect(this->rect() - QMargins(lineWidth, lineWidth, lineWidth, lineWidth));
+        return path;
+    }
+
+    void updatePosFromRect(QRect newPos);
+
+protected:
+    void hoverMoveEvent(QGraphicsSceneHoverEvent *event) override;
+    void hoverLeaveEvent(QGraphicsSceneHoverEvent *event) override;
+    void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
+    void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
+
+private:
+    enum class Edge { None, Left, Right, Top, Bottom, TopLeft, BottomLeft, TopRight, BottomRight };
+    ResizableRect::Edge detectEdge(int x, int y);
+
+    // Variables for keeping state of original rect while resizing
+    ResizableRect::Edge clickedEdge = ResizableRect::Edge::None;
+    QPointF clickedPos = QPointF();
+    QRect clickedRect;
+
+    int lineWidth = 8;
+
+signals:
+    void rectUpdated(QRect rect);
+};
+
 #endif // MOVABLERECT_H

include/ui/noscrollspinbox.h

@@ -12,6 +12,8 @@ public:
     void wheelEvent(QWheelEvent *event) override;
     void focusOutEvent(QFocusEvent *event) override;
 
+    void setLineEditEnabled(bool enabled);
+
     unsigned getActionId();
 
 private:

include/ui/resizelayoutpopup.h

@@ -0,0 +1,106 @@
+#ifndef RESIZELAYOUTPOPUP_H
+#define RESIZELAYOUTPOPUP_H
+
+#include <QDialog>
+#include <QPointer>
+#include <QGraphicsScene>
+#include <QGraphicsLineItem>
+#include <QGraphicsRectItem>
+
+class ResizableRect;
+class Editor;
+namespace Ui {
+    class ResizeLayoutPopup;
+}
+
+
+
+/// Custom scene that paints its background a gray checkered pattern.
+/// Additionally there is a definable "valid" area which will paint the checkerboard green inside.
+class CheckeredBgScene : public QGraphicsScene {
+    Q_OBJECT
+
+public:
+    CheckeredBgScene(QObject *parent = nullptr);
+    void setValidRect(int x, int y, int width, int height) {
+        this->validRect = QRect(x * this->gridSize, y * this->gridSize, width * this->gridSize, height * this->gridSize);
+    }
+    void setValidRect(QRect rect) {
+        this->validRect = rect;
+    }
+
+protected:
+    void drawBackground(QPainter *painter, const QRectF &rect) override;
+
+private:
+    int gridSize = 16; // virtual pixels
+    QRect validRect = QRect();
+};
+
+
+
+/// PixmapItem subclass which allows for creating a boundary which determine whether
+/// the pixmap paints normally or with a black tint.
+/// This item is movable and snaps on a 16x16 grid.
+class BoundedPixmapItem : public QGraphicsPixmapItem {
+public:
+    BoundedPixmapItem(const QPixmap &pixmap, QGraphicsItem *parent = nullptr);
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *) override;
+
+    void setBoundary(ResizableRect *rect) { this->boundary = rect; }
+
+protected:
+    QVariant itemChange(GraphicsItemChange change, const QVariant &value) override;
+
+private:
+    ResizableRect *boundary = nullptr;
+    QPointF clickedPos = QPointF();
+};
+
+
+
+/// The main (modal) dialog window for resizing layout and border dimensions.
+/// The dialog itself is minimal, and is connected to the parent widget's geometry.
+class ResizeLayoutPopup : public QDialog
+{
+    Q_OBJECT
+
+public:
+    ResizeLayoutPopup(QWidget *parent, Editor *editor);
+    ~ResizeLayoutPopup();
+
+    void setupLayoutView();
+
+    void resetPosition();
+
+    QMargins getResult();
+    QSize getBorderResult();
+
+protected:
+    void moveEvent(QMoveEvent *) override {
+        // Prevent the dialog from being moved
+        this->resetPosition();
+    }
+
+    void resizeEvent(QResizeEvent *) override {
+        // Prevent the dialog from being resized
+        this->resetPosition();
+    }
+
+private slots:
+    void on_spinBox_width_valueChanged(int value);
+    void on_spinBox_height_valueChanged(int value);
+
+private:
+    QWidget *parent = nullptr;
+    Editor *editor = nullptr;
+
+    Ui::ResizeLayoutPopup *ui;
+
+    ResizableRect *outline = nullptr;
+    BoundedPixmapItem *layoutPixmap = nullptr;
+
+    QPointer<CheckeredBgScene> scene = nullptr;
+};
+
+#endif // RESIZELAYOUTPOPUP_H