WIP

src/Nazara/Widgets/ImageButtonWidget.cpp

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+// Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Widgets module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Widgets/ImageButtonWidget.hpp>
+#include <Nazara/Graphics/BasicMaterial.hpp>
+#include <Nazara/Graphics/Material.hpp>
+#include <Nazara/Widgets/Debug.hpp>
+
+namespace Nz
+{
+	ImageButtonWidget::ImageButtonWidget(BaseWidget* parent, std::shared_ptr<Material> material, std::shared_ptr<Material> hoveredMaterial, std::shared_ptr<Material> pressedMaterial, float cornerSize, float cornerTexCoords) :
+	BaseWidget(parent),
+	m_hoveredMaterial(std::move(hoveredMaterial)),
+	m_material(std::move(material)),
+	m_pressedMaterial(std::move(pressedMaterial)),
+	m_color(Color::White),
+	m_textureCoords(0.f, 0.f, 1.f, 1.f),
+	m_cornerSize(cornerSize),
+	m_cornerTexCoords(cornerTexCoords)
+	{
+		m_style = GetTheme()->CreateStyle(this);
+		SetRenderLayerCount(m_style->GetRenderLayerCount());
+
+		UpdatePreferredSize();
+		Layout();
+	}
+
+	void ImageButtonWidget::Layout()
+	{
+		BaseWidget::Layout();
+		m_style->Layout(GetSize());
+	}
+
+	void ImageButtonWidget::OnMouseButtonPress(int /*x*/, int /*y*/, Mouse::Button button)
+	{
+		if (button == Mouse::Left)
+			m_style->OnPress();
+	}
+
+	void ImageButtonWidget::OnMouseButtonRelease(int x, int y, Mouse::Button button)
+	{
+		if (button == Mouse::Left)
+		{
+			m_style->OnRelease();
+
+			// If user clicks inside button and holds it outside, a release mouse button event will be triggered outside of the widget
+			// we don't want this to trigger the button, so double-check
+			if (IsInside(float(x), float(y)))
+				OnButtonTrigger(this);
+		}
+	}
+
+	void ImageButtonWidget::OnMouseEnter()
+	{
+		m_style->OnHoverBegin();
+	}
+
+	void ImageButtonWidget::OnMouseExit()
+	{
+		m_style->OnHoverEnd();
+	}
+
+	void ImageButtonWidget::OnRenderLayerUpdated(int baseRenderLayer)
+	{
+		m_style->UpdateRenderLayer(baseRenderLayer);
+	}
+
+	void ImageButtonWidget::UpdatePreferredSize()
+	{
+		const Rectf& textureCoords = GetTextureCoords();
+
+		// TODO: Move this in a separate function
+		if (const auto& material = m_material->FindPass("ForwardPass"))
+		{
+			BasicMaterial mat(*material);
+			if (mat.HasDiffuseMap())
+			{
+				// Material should always have textures but we're better safe than sorry
+				if (const auto& texture = mat.GetDiffuseMap())
+				{
+					Vector2f textureSize = Vector2f(Vector2ui(texture->GetSize()));
+					textureSize.x *= textureCoords.width;
+					textureSize.y *= textureCoords.height;
+
+					SetPreferredSize(textureSize);
+				}
+			}
+		}
+	}
+}