Source Code for Demo 2D Example Drawer

Location

./src/examples/src/example_drawer

This example shows:

• how to create a custom drawer
• how to add new properties to the derived drawer implementation.
• how to use the canvas inside the Draw method.

Header

 
#pragma once
 
#include <adtf_base.h>
#include <adtf_utils.h>
#include <adtf_systemsdk.h>
#include <adtf_filtersdk.h>
 
#include <adtfdisplaytoolboxdrawer/drawer.h>
#include <adtfdisplaytoolboxgraphics/gfxlibinterfaces.h>
 
class cExampleDrawer :
    public adtf::ucom::object<adtf::disptb::drawerlib::cDrawer>
{
public:
    ADTF_CLASS_ID_NAME(
        cExampleDrawer,
        "demo_example.2d_drawer.disptb.cid",
        "Demo 2D Drawer Example"
    );
 
    /*
    * Constructor
    */
    cExampleDrawer();
 
    /*
    * Destructor
    */
    ~cExampleDrawer() = default;
    
    tResult Init(tInitStage eStage) override;
    tResult Shutdown(tInitStage eStage) override;
 
    tResult Draw(const adtf::ucom::iobject_ptr<adtf::disptb::graphicslib::ICanvas>& pCanvas) override;
 
private:
 
    adtf::base::property_variable<tInt> m_propColorRed = 255;
    adtf::base::property_variable<tInt> m_propColorGreen = 0;
    adtf::base::property_variable<tInt> m_propColorBlue = 0;
    
    adtf::base::property_variable<tFloat32> m_propCircleX1 = -150.0;
    adtf::base::property_variable<tFloat32> m_propCircleX2 = 150.0;
    adtf::base::property_variable<tFloat32> m_propCircleY1 = -150.0;
    adtf::base::property_variable<tFloat32> m_propCircleY2 = 150.0;
};

Implementation

 
#include "example_drawer.h"
 
ADTF_PLUGIN_VERSION("Demo 2D Drawer Example Plugin", 
                    disptb,
                    DISPTB_VERSION_MAJOR,
                    DISPTB_VERSION_MINOR,
                    DISPTB_VERSION_PATCH,
                    cExampleDrawer)
 
cExampleDrawer::cExampleDrawer()
{
    m_propColorRed.SetDescription("Value for red content of color to draw a circle.");
    RegisterPropertyVariable("RGB-Color-Red", m_propColorRed);
 
    m_propColorGreen.SetDescription("Value for green content of color to draw a circle.");
    RegisterPropertyVariable("RGB-Color-Green", m_propColorGreen);
 
    m_propColorBlue.SetDescription("Value for blue content of color to draw a circle.");
    RegisterPropertyVariable("RGB-Color-Blue", m_propColorBlue);
 
    m_propCircleX1.SetDescription("Value for the x-axis of the first corner to draw a circle.");
    RegisterPropertyVariable("Circle-Coords-X1", m_propCircleX1);
 
    m_propCircleX2.SetDescription("Value for the x-axis of the second corner to draw a circle.");
    RegisterPropertyVariable("Circle-Coords-X2", m_propCircleX2);
 
    m_propCircleY1.SetDescription("Value for the y-axis of the first corner to draw a circle.");
    RegisterPropertyVariable("Circle-Coords-Y1", m_propCircleY1);
 
    m_propCircleY2.SetDescription("Value for the x-axis of the second corner to draw a circle.");
    RegisterPropertyVariable("Circle-Coords-Y2", m_propCircleY2);
 
    SetDescription("Use this Drawer to paint a simple circle onto the canvas.");
    SetHelpLink("$(ADTF_DISPLAY_TOOLBOX_DIR)/doc/displaytoolbox_html/page_2d_example_drawer_readme.html");
}
 
tResult cExampleDrawer::Init(tInitStage eStage)
{
    RETURN_IF_FAILED(cDrawer::Init(eStage));
 
    RETURN_NOERROR;
}
 
tResult cExampleDrawer::Shutdown(tInitStage eStage)
{
    RETURN_IF_FAILED(cDrawer::Shutdown(eStage));
    RETURN_NOERROR;
}
 
tResult cExampleDrawer::Draw(const adtf::ucom::iobject_ptr<adtf::disptb::graphicslib::ICanvas>& pCanvas)
{
    pCanvas->Color(
        m_propColorRed,
        m_propColorGreen,
        m_propColorBlue
    );
 
    pCanvas->DrawCircle(
        m_propCircleX1,
        m_propCircleY1,
        m_propCircleX2,
        m_propCircleY2
    );
 
    RETURN_NOERROR;
}