Urho3D/Source/Samples/01_HelloWorld/HelloWorld.cpp
2021-07-17 16:43:46 +00:00

91 lines
3.0 KiB
C++

//
// Copyright (c) 2008-2021 the Urho3D project.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
#include <Urho3D/Core/CoreEvents.h>
#include <Urho3D/Core/ProcessUtils.h>
#include <Urho3D/Input/Input.h>
#include <Urho3D/UI/Font.h>
#include <Urho3D/UI/Text.h>
#include <Urho3D/UI/UI.h>
#include "HelloWorld.h"
#include <Urho3D/DebugNew.h>
// Expands to this example's entry-point
URHO3D_DEFINE_APPLICATION_MAIN(HelloWorld)
HelloWorld::HelloWorld(Context* context) :
Sample(context)
{
}
void HelloWorld::Start()
{
// Execute base class startup
Sample::Start();
// Create "Hello World" Text
CreateText();
// Finally subscribe to the update event. Note that by subscribing events at this point we have already missed some events
// like the ScreenMode event sent by the Graphics subsystem when opening the application window. To catch those as well we
// could subscribe in the constructor instead.
SubscribeToEvents();
// Set the mouse mode to use in the sample
Sample::InitMouseMode(MM_FREE);
}
void HelloWorld::CreateText()
{
auto* cache = GetSubsystem<ResourceCache>();
// Construct new Text object
SharedPtr<Text> helloText(new Text(context_));
// Set String to display
helloText->SetText("Hello World from Urho3D!");
// Set font and text color
helloText->SetFont(cache->GetResource<Font>("Fonts/Anonymous Pro.ttf"), 30);
helloText->SetColor(Color(0.0f, 1.0f, 0.0f));
// Align Text center-screen
helloText->SetHorizontalAlignment(HA_CENTER);
helloText->SetVerticalAlignment(VA_CENTER);
// Add Text instance to the UI root element
GetSubsystem<UI>()->GetRoot()->AddChild(helloText);
}
void HelloWorld::SubscribeToEvents()
{
// Subscribe HandleUpdate() function for processing update events
SubscribeToEvent(E_UPDATE, URHO3D_HANDLER(HelloWorld, HandleUpdate));
}
void HelloWorld::HandleUpdate(StringHash eventType, VariantMap& eventData)
{
// Do nothing for now, could be extended to eg. animate the display
}