DevTools: Move to Userland/DevTools/

Userland/DevTools/HackStudio/CursorTool.cpp

@@ -0,0 +1,204 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "CursorTool.h"
+#include "FormEditorWidget.h"
+#include "FormWidget.h"
+#include "WidgetTreeModel.h"
+#include <AK/LogStream.h>
+#include <LibGfx/Palette.h>
+
+//#define DEBUG_CURSOR_TOOL
+
+namespace HackStudio {
+
+void CursorTool::on_mousedown(GUI::MouseEvent& event)
+{
+#ifdef DEBUG_CURSOR_TOOL
+    dbgln("CursorTool::on_mousedown");
+#endif
+    auto& form_widget = m_editor.form_widget();
+    auto result = form_widget.hit_test(event.position(), GUI::Widget::ShouldRespectGreediness::No);
+
+    if (event.button() == GUI::MouseButton::Left) {
+        if (result.widget && result.widget != &form_widget) {
+            if (event.modifiers() & Mod_Ctrl) {
+                m_editor.selection().toggle(*result.widget);
+            } else if (!event.modifiers()) {
+                if (!m_editor.selection().contains(*result.widget)) {
+#ifdef DEBUG_CURSOR_TOOL
+                    dbg() << "Selection didn't contain " << *result.widget << ", making it the only selected one";
+#endif
+                    m_editor.selection().set(*result.widget);
+                }
+
+                m_drag_origin = event.position();
+                m_positions_before_drag.clear();
+                m_editor.selection().for_each([&](auto& widget) {
+                    m_positions_before_drag.set(&widget, widget.relative_position());
+                    return IterationDecision::Continue;
+                });
+            }
+        } else {
+            m_editor.selection().clear();
+            m_rubber_banding = true;
+            m_rubber_band_origin = event.position();
+            m_rubber_band_position = event.position();
+            form_widget.update();
+        }
+        // FIXME: Do we need to update any part of the FormEditorWidget outside the FormWidget?
+        form_widget.update();
+    }
+}
+
+void CursorTool::on_mouseup(GUI::MouseEvent& event)
+{
+#ifdef DEBUG_CURSOR_TOOL
+    dbgln("CursorTool::on_mouseup");
+#endif
+    if (event.button() == GUI::MouseButton::Left) {
+        auto& form_widget = m_editor.form_widget();
+        auto result = form_widget.hit_test(event.position(), GUI::Widget::ShouldRespectGreediness::No);
+        if (!m_dragging && !(event.modifiers() & Mod_Ctrl)) {
+            if (result.widget && result.widget != &form_widget) {
+                m_editor.selection().set(*result.widget);
+                // FIXME: Do we need to update any part of the FormEditorWidget outside the FormWidget?
+                form_widget.update();
+            }
+        }
+        m_dragging = false;
+        m_rubber_banding = false;
+        form_widget.update();
+    }
+}
+
+void CursorTool::on_mousemove(GUI::MouseEvent& event)
+{
+#ifdef DEBUG_CURSOR_TOOL
+    dbgln("CursorTool::on_mousemove");
+#endif
+    auto& form_widget = m_editor.form_widget();
+
+    if (m_rubber_banding) {
+        set_rubber_band_position(event.position());
+        return;
+    }
+
+    if (!m_dragging && event.buttons() & GUI::MouseButton::Left && event.position() != m_drag_origin) {
+        auto result = form_widget.hit_test(event.position(), GUI::Widget::ShouldRespectGreediness::No);
+        if (result.widget && result.widget != &form_widget) {
+            if (!m_editor.selection().contains(*result.widget)) {
+                m_editor.selection().set(*result.widget);
+                // FIXME: Do we need to update any part of the FormEditorWidget outside the FormWidget?
+                form_widget.update();
+            }
+        }
+        m_dragging = true;
+    }
+
+    if (m_dragging) {
+        auto movement_delta = event.position() - m_drag_origin;
+        m_editor.selection().for_each([&](auto& widget) {
+            auto new_rect = widget.relative_rect();
+            new_rect.set_location(m_positions_before_drag.get(&widget).value_or({}).translated(movement_delta));
+            new_rect.set_x(new_rect.x() - (new_rect.x() % m_editor.form_widget().grid_size()));
+            new_rect.set_y(new_rect.y() - (new_rect.y() % m_editor.form_widget().grid_size()));
+            widget.set_relative_rect(new_rect);
+            return IterationDecision::Continue;
+        });
+        m_editor.model().update();
+        return;
+    }
+}
+
+void CursorTool::on_keydown(GUI::KeyEvent& event)
+{
+#ifdef DEBUG_CURSOR_TOOL
+    dbgln("CursorTool::on_keydown");
+#endif
+
+    auto move_selected_widgets_by = [this](int x, int y) {
+        m_editor.selection().for_each([&](auto& widget) {
+            widget.move_by(x, y);
+            return IterationDecision::Continue;
+        });
+    };
+
+    if (event.modifiers() == 0) {
+        switch (event.key()) {
+        case Key_Down:
+            move_selected_widgets_by(0, m_editor.form_widget().grid_size());
+            break;
+        case Key_Up:
+            move_selected_widgets_by(0, -m_editor.form_widget().grid_size());
+            break;
+        case Key_Left:
+            move_selected_widgets_by(-m_editor.form_widget().grid_size(), 0);
+            break;
+        case Key_Right:
+            move_selected_widgets_by(m_editor.form_widget().grid_size(), 0);
+            break;
+        default:
+            break;
+        }
+    }
+}
+
+void CursorTool::set_rubber_band_position(const Gfx::IntPoint& position)
+{
+    if (m_rubber_band_position == position)
+        return;
+    m_rubber_band_position = position;
+
+    auto rubber_band_rect = this->rubber_band_rect();
+
+    m_editor.selection().clear();
+    m_editor.form_widget().for_each_child_widget([&](auto& child) {
+        if (child.relative_rect().intersects(rubber_band_rect))
+            m_editor.selection().add(child);
+        return IterationDecision::Continue;
+    });
+
+    m_editor.form_widget().update();
+}
+
+Gfx::IntRect CursorTool::rubber_band_rect() const
+{
+    if (!m_rubber_banding)
+        return {};
+    return Gfx::IntRect::from_two_points(m_rubber_band_origin, m_rubber_band_position);
+}
+
+void CursorTool::on_second_paint(GUI::Painter& painter, GUI::PaintEvent&)
+{
+    if (!m_rubber_banding)
+        return;
+    auto rect = rubber_band_rect();
+    painter.fill_rect(rect, m_editor.palette().rubber_band_fill());
+    painter.draw_rect(rect, m_editor.palette().rubber_band_border());
+}
+
+}