Intro :
Parfois nous avons besoin qu’une GUIWidget puisse être déplaçable à volonté tout en restant appuyé dessus la souris.
Prérequis :
– Avoir compris la classe GUIWidget
Contenu :
Voici le contenu GUIDraggableWidget.h :
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#ifndef GUI_DRAGGABLE_WIGET_H #define GUI_DRAGGABLE_WIGET_H #include <iostream> #include <d3dx10math.h> #include "GUIImage.h" #include "GUIButton.h" class GUIDraggableWiget : public GUIImage { public: enum DraggableBoxState { NON_ACTIVE, DRAGGING }; GUIDraggableWiget(const std::string& sName, const std::string& sTextureFileName); virtual ~GUIDraggableWiget(); virtual void Update(float fTimeSinceLastFrame); virtual void SetPosition(unsigned int x, unsigned int y); virtual void SetSize(unsigned int iWidth, unsigned int iHeight); void DisableDragging(); void EnableDragging(); private: bool IsCollidingWithDraggableBox(int x, int y); bool IsCollidingWithCloseBox(int x, int y); void SetBoxesPositions(unsigned int x, unsigned int y); D3DXVECTOR2 GetDraggableBoxPosition(); DraggableBoxState GetDraggableBoxState(); void SetDraggableBoxState(DraggableBoxState state); void SetImageSize(unsigned int iWidth, unsigned int iHeight); private: AABB m_draggableBoxAABB; AABB m_closeBoxAABB; DraggableBoxState m_state; int xPos; int yPos; int sx; int sy; bool m_bDragging; bool m_bDraggingEnabled; }; #endif |
Voici le fichier GUIDraggableWidget.cpp :
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#include "GUIDraggableWidget.h" #include "InputManager.h" #include "GUIManager.h" GUIDraggableWiget::GUIDraggableWiget(const std::string& sName, const std::string& sTextureFileName) : GUIImage(sName, sTextureFileName), xPos(0), yPos(0), sx(0), sy(0), m_bDragging(false), m_bDraggingEnabled(true) { ZeroMemory(&m_draggableBoxAABB, sizeof(AABB)); ZeroMemory(&m_closeBoxAABB, sizeof(AABB)); m_draggableBoxAABB.w = (float)GetImage()->GetWidth(); m_draggableBoxAABB.h = (float)GetImage()->GetHeight() * 0.3f; m_closeBoxAABB.w = 20; m_closeBoxAABB.h = 20; } GUIDraggableWiget::~GUIDraggableWiget() { } void GUIDraggableWiget::Update(float fTimeSinceLastFrame) { if (!IsVisible()) { return; } GUIImage::Update(fTimeSinceLastFrame); int absX, absY; INPUT_MANAGER->GetAbsMouseLocation(absX, absY); int dX = absX - sx; int dY = absY - sy; if (INPUT_MANAGER->IsMouseButtonDown(MOUSE_LEFT_BUTTON_DOWN) && GUI_MANAGER->DoesWidgetIsOnFront(this) && SYSTEM->HasFocus() && IsActive()) { if (IsCollidingWithDraggableBox(absX, absY) && m_bDraggingEnabled) { m_bDragging = true; } if (IsCollidingWithCloseBox(absX, absY)) { SetVisible(false); } if (m_bDragging) { SetDraggableBoxState(DraggableBoxState::DRAGGING); xPos += dX; yPos += dY; /* Contraintes de bords */ if (yPos <= 0) { yPos = 0; } if (xPos <= 0) { xPos = 0; } unsigned int iWidthOffset = D3D10_RENDERER->GetViewportWidth() - GetImage()->GetWidth(); unsigned int iHeightOffset = D3D10_RENDERER->GetViewportHeight() - GetImage()->GetHeight(); /* Contraintes de bords */ if (xPos >= iWidthOffset) { xPos = iWidthOffset; } if (yPos >= iHeightOffset) { yPos = iHeightOffset; } SetPosition(xPos, yPos); } } else { m_bDragging = false; } sx = absX; sy = absY; } bool GUIDraggableWiget::IsCollidingWithDraggableBox(int x, int y) { return (x >= m_draggableBoxAABB.x) && (x < (m_draggableBoxAABB.x + m_draggableBoxAABB.w)) && (y >= m_draggableBoxAABB.y) && (y < (m_draggableBoxAABB.y + m_draggableBoxAABB.h)) && IsVisible(); } bool GUIDraggableWiget::IsCollidingWithCloseBox(int x, int y) { return (x >= m_closeBoxAABB.x) && (x < (m_closeBoxAABB.x + m_closeBoxAABB.w)) && (y >= m_closeBoxAABB.y) && (y < (m_closeBoxAABB.y + m_closeBoxAABB.h)) && IsVisible(); } void GUIDraggableWiget::SetDraggableBoxState(DraggableBoxState state) { m_state = state; } GUIDraggableWiget::DraggableBoxState GUIDraggableWiget::GetDraggableBoxState() { return m_state; } void GUIDraggableWiget::SetBoxesPositions(unsigned int x, unsigned int y) { m_draggableBoxAABB.x = x; m_draggableBoxAABB.y = y; m_closeBoxAABB.x = (GetImage()->GetWidth() - m_closeBoxAABB.w) + x; m_closeBoxAABB.y = y; } D3DXVECTOR2 GUIDraggableWiget::GetDraggableBoxPosition() { return D3DXVECTOR2(m_draggableBoxAABB.x, m_draggableBoxAABB.y); } void GUIDraggableWiget::SetPosition(unsigned int x, unsigned int y) { SetBoxesPositions(x, y); xPos = x; yPos = y; GUIImage::SetPosition(x, y); } void GUIDraggableWiget::SetSize(unsigned int iWidth, unsigned int iHeight) { GUIImage::SetSize(iWidth, iHeight); m_draggableBoxAABB.w = (float)GetImage()->GetWidth(); m_draggableBoxAABB.h = (float)GetImage()->GetHeight() * 0.3f; } void GUIDraggableWiget::DisableDragging() { m_bDraggingEnabled = false; } void GUIDraggableWiget::EnableDragging() { m_bDraggingEnabled = true; } |
Résumé :
Nous avons décrit une classe qui représente un moyen d’afficher une GUIWidget déplaçable.