More hacking on Widgets.

Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/a4491e9630c

Widgets/Makefile

@@ -19,6 +19,7 @@ VFS_OBJS = \
     Label.o \
     Button.o \
     TerminalWidget.o \
+    WindowManager.o \
     test.o
 
 OBJS = $(AK_OBJS) $(VFS_OBJS)

Widgets/Rect.h

@@ -22,6 +22,14 @@ public:
         return { x() + width() / 2, y() + height() / 2 };
     }
 
+    void inflate(int w, int h)
+    {
+        setX(x() - w / 2);
+        setWidth(width() + w);
+        setY(y() - h / 2);
+        setHeight(height() + h);
+    }
+
     bool contains(int x, int y) const
     {
         return x >= m_location.x() && x <= right() && y >= m_location.y() && y <= bottom();

Widgets/RootWidget.cpp

@@ -1,5 +1,6 @@
 #include "RootWidget.h"
 #include "Painter.h"
+#include "WindowManager.h"
 #include <cstdio>
 
 RootWidget::RootWidget()
@@ -12,15 +13,16 @@ RootWidget::~RootWidget()
 
 void RootWidget::onPaint(PaintEvent& event)
 {
-    printf("RootWidget::onPaint\n");
+    //printf("RootWidget::onPaint\n");
     Painter painter(*this);
     painter.fillRect(Rect(0, 0, 800, 600), Color(0x40, 0x40, 0x40));
+    WindowManager::the().paintWindowFrames();
     Widget::onPaint(event);
 }
 
 void RootWidget::onMouseMove(MouseEvent& event)
 {
-    printf("RootWidget::onMouseMove: x=%d, y=%d\n", event.x(), event.y());
+    //printf("RootWidget::onMouseMove: x=%d, y=%d\n", event.x(), event.y());
     Widget::onMouseMove(event);
 }
 

Widgets/TerminalWidget.cpp

@@ -11,6 +11,8 @@ TerminalWidget* g_tw;
 TerminalWidget::TerminalWidget(Widget* parent)
     : Widget(parent)
 {
+    setIsWindow(true);
+
     g_tw = this;
     
     setRect({ 100, 300, columns() * 8, rows() * 10 });

Widgets/Widget.cpp

@@ -1,6 +1,7 @@
 #include "Widget.h"
 #include "Event.h"
 #include "EventLoop.h"
+#include "WindowManager.h"
 #include <AK/Assertions.h>
 
 Widget::Widget(Widget* parent)
@@ -21,6 +22,17 @@ void Widget::setRect(const Rect& rect)
     update();
 }
 
+void Widget::setIsWindow(bool value)
+{
+    if (m_isWindow == value)
+        return;
+    m_isWindow = value;
+    if (m_isWindow) {
+        WindowManager::the().addWindow(*this);
+    }
+    update();
+}
+
 void Widget::event(Event& event)
 {
     switch (event.type()) {
@@ -104,3 +116,10 @@ Widget::HitTestResult Widget::hitTest(int x, int y)
     return { this, x, y };
 }
 
+void Widget::setWindowTitle(String&& title)
+{
+    if (title == m_windowTitle)
+        return;
+    m_windowTitle = std::move(title);
+    WindowManager::the().notifyTitleChanged(*this);
+}

Widgets/Widget.h

@@ -4,6 +4,7 @@
 #include "Object.h"
 #include "Rect.h"
 #include "Color.h"
+#include <AK/String.h>
 
 class Widget : public Object {
 public:
@@ -45,10 +46,18 @@ public:
     void setBackgroundColor(Color color) { m_backgroundColor = color; }
     void setForegroundColor(Color color) { m_foregroundColor = color; }
 
+    bool isWindow() const { return m_isWindow; }
+    void setIsWindow(bool);
+
+    void setWindowTitle(String&&);
+    String windowTitle() const { return m_windowTitle; }
+
 private:
     Rect m_rect;
     Color m_backgroundColor;
     Color m_foregroundColor;
+    String m_windowTitle;
 
+    bool m_isWindow { false };
     bool m_hasPendingPaintEvent { false };
 };

Widgets/WindowManager.cpp

@@ -0,0 +1,79 @@
+#include "WindowManager.h"
+#include "Painter.h"
+#include "Widget.h"
+#include "AbstractScreen.h"
+
+WindowManager& WindowManager::the()
+{
+    static WindowManager* s_the = new WindowManager;
+    return *s_the;
+}
+
+WindowManager::WindowManager()
+{
+}
+
+WindowManager::~WindowManager()
+{
+}
+
+void WindowManager::paintWindowFrames()
+{
+    for (auto* widget : m_windows) {
+        paintWindowFrame(*widget);
+    }
+}
+
+void WindowManager::paintWindowFrame(Widget& widget)
+{
+    Painter p(*AbstractScreen::the().rootWidget());
+
+    printf("WM: paintWindowFrame %s{%p}, rect: %d,%d %dx%d\n", widget.className(), &widget, widget.rect().x(), widget.rect().y(), widget.rect().width(), widget.rect().height());
+
+    static const int windowFrameWidth = 2;
+    static const int windowTitleBarHeight = 14;
+
+    Rect topRect {
+        widget.x() - windowFrameWidth,
+        widget.y() - windowTitleBarHeight - windowFrameWidth,
+        widget.width() + windowFrameWidth * 2,
+        windowTitleBarHeight + windowFrameWidth };
+
+    Rect bottomRect {
+        widget.x() - windowFrameWidth,
+        widget.y() + widget.height(),
+        widget.width() + windowFrameWidth * 2,
+        windowFrameWidth };
+
+    Rect leftRect {
+        widget.x() - windowFrameWidth,
+        widget.y(),
+        windowFrameWidth,
+        widget.height()
+    };
+
+    Rect rightRect {
+        widget.x() + widget.width(),
+        widget.y(),
+        windowFrameWidth,
+        widget.height()
+    };
+
+    p.fillRect(topRect, Color(0x40, 0x40, 0xc0));
+    p.fillRect(bottomRect, Color(0x40, 0x40, 0xc0));
+    p.fillRect(leftRect, Color(0x40, 0x40, 0xc0));
+    p.fillRect(rightRect, Color(0x40, 0x40, 0xc0));
+
+    p.drawText(topRect, widget.windowTitle(), Painter::TextAlignment::Center, Color(255, 255, 255));
+}
+
+void WindowManager::addWindow(Widget& widget)
+{
+    m_windows.set(&widget);
+}
+
+void WindowManager::notifyTitleChanged(Widget&)
+{
+    AbstractScreen::the().rootWidget()->update();
+}
+

Widgets/WindowManager.h

@@ -0,0 +1,24 @@
+#pragma once
+
+class Widget;
+
+#include "Object.h"
+#include <AK/HashTable.h>
+
+class WindowManager : public Object {
+public:
+    static WindowManager& the();
+
+    void addWindow(Widget&);
+    void paintWindowFrames();
+
+    void notifyTitleChanged(Widget&);
+
+private:
+    WindowManager();
+    ~WindowManager();
+
+    void paintWindowFrame(Widget&);
+
+    HashTable<Widget*> m_windows;
+};

Widgets/test.cpp

@@ -4,6 +4,7 @@
 #include "Label.h"
 #include "Button.h"
 #include "TerminalWidget.h"
+#include "WindowManager.h"
 #include <cstdio>
 
 int main(int c, char** v)
@@ -16,6 +17,8 @@ int main(int c, char** v)
     RootWidget w;
     fb.setRootWidget(&w);
 
+    WindowManager::the();
+
     auto* l1 = new Label(&w);
     l1->setRect(Rect(100, 100, 300, 20));
     l1->setText("0123456789");
@@ -37,6 +40,7 @@ int main(int c, char** v)
     b->setCaption("Button!");
 
     auto* t = new TerminalWidget(&w);
+    t->setWindowTitle("Console");
 
     return loop.exec();
 }