neofx-zoomedit/ToolRotate.cpp

#include "ToolRotate.h"
#include <GL/gl.h>


ToolRotate::ToolRotate(EditManager *editManager) : Renderer(editManager), sidebar(editManager) {
  this->editManager = editManager;
  
  pressed = false;
  
  image = gtk_image_new_from_stock(GTK_STOCK_MISSING_IMAGE, GTK_ICON_SIZE_BUTTON);
  g_object_ref_sink(G_OBJECT(image));
}

ToolRotate::~ToolRotate() {
  g_object_unref(G_OBJECT(image));
}

void ToolRotate::activate() {
  pressed = false;
  editManager->setSelectedObject(NULL);
}

bool ToolRotate::buttonPress(unsigned int button, const Vertex *v) {
  if(button != 1 || !editManager->getHoveredObject())
    return false;
  
  pressed = true;
  valid = false;
  vertexRot = vertex = *v;
  
  editManager->setSelectedObject(editManager->getHoveredObject());
  
  editManager->redraw();
  sidebar.update();
  
  return true;
}

bool ToolRotate::buttonRelease(unsigned int button, const Vertex *v) {
  if(button != 1)
    return false;
  
  pressed = false;
  
  editManager->setSelectedObject(NULL);
  
  editManager->redraw();
  sidebar.update();
  
  return true;
}

bool ToolRotate::motion(const Vertex *v, float scale) {
  if(!pressed) 
    return false;
  
  if(!v)
    return false;
  
  vertex = *v;
  
  float a = atan2((vertex-vertexRot).getY(), (vertex-vertexRot).getX());
  
  if(vertexRot.distanceSq(vertex) > (10*10)/(scale*scale)) {
    if(valid)
      editManager->getSelectedObject()->rotate(vertexRot, a-angle);
    
    else
      valid = true;
  }
  else
    valid = false;
  
  angle = a;
  
  return false;
}

void ToolRotate::render(const Level &level, const Rectangle &rect, float scale) {
  Renderer::render(level, rect, scale);
  
  if(pressed && valid) {
    glLineWidth(1.0f);
    glColor4f(1.0f, 1.0f, 1.0f, 0.7f);
    drawCircleDotted(vertexRot, vertexRot.distance(vertex), 64, 16, angle);
    
    glLineWidth(2.0f);
    
    glBegin(GL_LINES);
    
    glVertex2f(vertexRot.getX(), vertexRot.getY());
    glVertex2f(vertex.getX(), vertex.getY());
    
    glEnd();
  }
}