Added ghost image for gate placement

include/Component.hpp

@@ -10,6 +10,9 @@ class Component : public QFrame
 {
 public:
 	explicit Component(QWidget* parent);
+	explicit Component(QWidget* parent, const QString& resource);
+
+	void mouseMoveEvent(QMouseEvent* event) override;
 
 private:
 	Ui::Component* ui;

include/GhostLabel.hpp

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <qlabel.h>
+
+class GhostLabel : public QLabel
+{
+public:
+	explicit GhostLabel(QWidget* parent) :
+		QLabel(parent)
+	{
+		setMouseTracking(true);
+	}
+
+	void mouseMoveEvent(QMouseEvent* event) override
+	{
+		// Ignore all mouse move events, who cares tbh
+		event->ignore();
+	}
+};

include/Window.hpp

@@ -7,6 +7,8 @@ namespace Ui {
 }
 
 class Component;
+class QActionGroup;
+class GhostLabel;
 
 class Window : public QMainWindow
 {
@@ -21,6 +23,8 @@ protected:
 
 private:
 	void ToggleSimulation();
+	void ToggleComponentPlacer();
+	void LoadGhostLabel(const QString& resource);
 
 	Ui::Window* ui;
 	bool simulating;
@@ -29,4 +33,8 @@ private:
 		Component* component;
 		QPoint relativePos;
 	} dragInfo;
+
+	GhostLabel* ghostImage;
+	QString resourcePath;
+	QActionGroup* componentGroup;
 };

src/Component.cpp

@@ -1,9 +1,27 @@
 #include "Component.hpp"
 #include "ui_Component.h"
 
+#include <iostream>
+#include <qevent.h>
+
 Component::Component(QWidget* parent) :
+	Component(parent, ":/components/and.png")
+{
+
+}
+
+Component::Component(QWidget* parent, const QString& resource) :
 	QFrame(parent), ui(nullptr)
 {
 	ui = new Ui::Component();
 	ui->setupUi(this);
-}
+
+	ui->label->setPixmap(QPixmap(":/components/and.png"));
+
+	std::cout << "Created Component --" << ui->label->pos().x() << ", " << ui->label->pos().y() << std::endl;
+}
+
+void Component::mouseMoveEvent(QMouseEvent* event)
+{
+	event->ignore();
+}

src/Window.cpp

@@ -1,16 +1,35 @@
 #include "Window.hpp"
 #include "ui_Window.h"
 
+#include "Component.hpp"
+
 #include <iostream>
 #include <qevent.h>
+#include "GhostLabel.hpp"
+#include <qlayout.h>
+#include <qpainter.h>
+#include <qactiongroup.h>
 
 Window::Window() :
-	QMainWindow(), ui(nullptr), simulating(false)
+	QMainWindow(), ui(nullptr), simulating(false), dragInfo{nullptr, QPoint()}, 
+	ghostImage(nullptr), componentGroup(nullptr)
 {
 	ui = new Ui::Window();
 	ui->setupUi(this);
 
+	ui->centralwidget->setAttribute(Qt::WA_TransparentForMouseEvents);
+	setMouseTracking(true);
+
+	LoadGhostLabel(":/components/and.png");
+
+	componentGroup = new QActionGroup(this);
+	componentGroup->addAction(ui->actionAddAND);
+	componentGroup->addAction(ui->actionAddOR);
+	componentGroup->setExclusionPolicy(QActionGroup::ExclusionPolicy::ExclusiveOptional);
+
 	connect(ui->actionStart, &QAction::triggered, this, &Window::ToggleSimulation);
+	connect(ui->actionAddAND, &QAction::triggered, this, [this]() {resourcePath = ":/components/and.png"; ToggleComponentPlacer(); });
+	connect(ui->actionAddOR, &QAction::triggered, this, [this]() {resourcePath = ":/components/or.png"; ToggleComponentPlacer(); });
 }
 
 Window::~Window()
@@ -25,20 +44,47 @@ void Window::mousePressEvent(QMouseEvent* event)
 
 	ui->centralwidget->findChildren<Component*>();
 	QFrame* child = static_cast<QFrame*>(ui->centralwidget->childAt(event->pos()));
-	if (child == nullptr)
-		return;
 
-	if (!child->isAncestorOf(ui->centralwidget))
-		child = static_cast<QFrame*>(child->parentWidget());
+	QAction* toggledAction = componentGroup->checkedAction();
+	if (toggledAction == nullptr)
+	{
+		if (child == nullptr)
+			return;
 
-	dragInfo.component = static_cast<Component*>(child);
-	dragInfo.relativePos = event->pos() - child->pos();
+		if (!child->isAncestorOf(ui->centralwidget))
+			child = static_cast<QFrame*>(child->parentWidget());
+
+		dragInfo.component = static_cast<Component*>(child);
+		dragInfo.relativePos = event->pos() - child->pos();
+	}
+	else
+	{
+		if (child != nullptr)
+			return;
+
+		// So Qt can't add widgets outside of the constructor apparently
+		// So component cannot be a QFrame, it will have to become just a normal object
+		// And I need one of these open gl gsjdööööööööööööööl<
+		// TODO: I'll just let this leak for now, I just wanna eat dinner...
+		Component* leak = new Component(this, resourcePath);
+		QPoint pos = event->pos() - QPoint {50, 25};
+		leak->setGeometry(QRect(280, 160, 100, 50));
+		leak->setFrameShape(QFrame::StyledPanel);
+		leak->setFrameShadow(QFrame::Raised);
+
+		std::cout << leak->pos().x() << ", " << leak->pos().y() << std::endl;
+	}
 }
 
 void Window::mouseMoveEvent(QMouseEvent* event)
 {
 	if (dragInfo.component != nullptr)
 		dragInfo.component->move(event->pos() - dragInfo.relativePos);
+
+	if (ghostImage != nullptr)
+		ghostImage->move(event->pos() - QPoint{50, 25});	// TODO: Hardcoded
+
+	event->accept();
 }
 
 void Window::mouseReleaseEvent(QMouseEvent* event)
@@ -51,3 +97,36 @@ void Window::ToggleSimulation()
 	simulating = !simulating;
 	ui->actionStart->setIcon(QIcon(simulating ? ":/toolbar/stop.png" : ":/toolbar/start.png"));
 }
+
+void Window::ToggleComponentPlacer()
+{
+	QAction* toggledAction = componentGroup->checkedAction();
+	if (toggledAction == nullptr)
+	{
+		delete ghostImage;
+		ghostImage = nullptr;
+	}
+	else
+	{
+		LoadGhostLabel(resourcePath);
+	}
+}
+
+void Window::LoadGhostLabel(const QString& resource)
+{
+	if (ghostImage == nullptr) {
+		ghostImage = new GhostLabel(this);
+		ghostImage->setGeometry({ 0, 0, 100, 50 });
+		ghostImage->setScaledContents(true);
+	}
+
+	QPainter p;
+	QImage image(resource);
+
+	p.begin(&image);
+	p.setCompositionMode(QPainter::CompositionMode_DestinationIn);
+	p.fillRect(image.rect(), QColor(0, 0, 0, 50));
+	p.end();
+
+	ghostImage->setPixmap(QPixmap::fromImage(image));
+}

ui/Component.ui

@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>100</width>
-    <height>100</height>
+    <width>102</width>
+    <height>50</height>
    </rect>
   </property>
   <property name="sizePolicy">
@@ -21,6 +21,9 @@
     <pointsize>19</pointsize>
    </font>
   </property>
+  <property name="cursor">
+   <cursorShape>PointingHandCursor</cursorShape>
+  </property>
   <property name="windowTitle">
    <string>Form</string>
   </property>
@@ -36,15 +39,12 @@
      <x>0</x>
      <y>0</y>
      <width>100</width>
-     <height>100</height>
+     <height>50</height>
     </rect>
    </property>
    <property name="text">
     <string/>
    </property>
-   <property name="pixmap">
-    <pixmap resource="assets/resources.qrc">:/components/and.png</pixmap>
-   </property>
    <property name="scaledContents">
     <bool>true</bool>
    </property>

ui/Window.ui

@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>800</width>
-    <height>600</height>
+    <width>924</width>
+    <height>700</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -20,23 +20,17 @@
    <widget class="Component" name="frame">
     <property name="geometry">
      <rect>
-      <x>170</x>
+      <x>360</x>
       <y>180</y>
-      <width>100</width>
-      <height>100</height>
+      <width>120</width>
+      <height>80</height>
      </rect>
     </property>
-    <property name="autoFillBackground">
-     <bool>false</bool>
-    </property>
-    <property name="styleSheet">
-     <string notr="true"/>
-    </property>
     <property name="frameShape">
-     <enum>QFrame::NoFrame</enum>
+     <enum>QFrame::StyledPanel</enum>
     </property>
     <property name="frameShadow">
-     <enum>QFrame::Plain</enum>
+     <enum>QFrame::Raised</enum>
     </property>
    </widget>
   </widget>
@@ -52,6 +46,9 @@
     <bool>false</bool>
    </attribute>
    <addaction name="actionStart"/>
+   <addaction name="separator"/>
+   <addaction name="actionAddAND"/>
+   <addaction name="actionAddOR"/>
   </widget>
   <action name="actionStart">
    <property name="icon">
@@ -68,6 +65,46 @@
     <string>F5</string>
    </property>
   </action>
+  <action name="actionAddAND">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="checked">
+    <bool>true</bool>
+   </property>
+   <property name="icon">
+    <iconset resource="assets/resources.qrc">
+     <normaloff>:/components/and.png</normaloff>:/components/and.png</iconset>
+   </property>
+   <property name="text">
+    <string>AddAND</string>
+   </property>
+   <property name="toolTip">
+    <string>Create an AND gate</string>
+   </property>
+   <property name="shortcut">
+    <string>1</string>
+   </property>
+  </action>
+  <action name="actionAddOR">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="icon">
+    <iconset resource="assets/resources.qrc">
+     <normaloff>:/components/or.png</normaloff>
+     <selectedoff>:/components/and.png</selectedoff>:/components/or.png</iconset>
+   </property>
+   <property name="text">
+    <string>AddOR</string>
+   </property>
+   <property name="toolTip">
+    <string>Create an OR gate</string>
+   </property>
+   <property name="shortcut">
+    <string>2</string>
+   </property>
+  </action>
  </widget>
  <customwidgets>
   <customwidget>

ui/assets/README.md

@@ -1 +1,6 @@
-Start/Stop icons taken from https://iconsmind.com/ (modified)
+Start/Stop icons taken from https://iconsmind.com/ (modified)
+
+Logic Gates taken from Wikimedia Commons. The authors are
+* jjbeard (AND, OR)
+
+The Wikimedia icons are part of the public domain

ui/assets/resources.qrc

@@ -5,5 +5,6 @@
     </qresource>
     <qresource prefix="/components">
         <file>and.png</file>
+        <file>or.png</file>
     </qresource>
 </RCC>