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/* Copyright (C) 2025 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* 0 A.D. is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#include "precompiled.h"
#include "Canvas.h"
#include "tools/atlas/GameInterface/MessagePasser.h"
#include "tools/atlas/GameInterface/Messages.h"
#include <wx/chartype.h>
#include <wx/mousestate.h>
#include <wx/string.h>
#include <wx/toolbar.h>
class wxWindow;
Canvas::Canvas(wxWindow* parent, int* attribList, long style)
: wxGLCanvas(parent, -1, attribList, wxDefaultPosition, wxDefaultSize, style, _T("GLCanvas")),
m_GLContext(this),
m_SuppressResize(true),
m_LastMousePos(-1, -1), m_MouseCaptured(false)
{
}
void Canvas::SetCurrent()
{
m_GLContext.SetCurrent(*this);
}
void Canvas::OnResize(wxSizeEvent&)
{
// Be careful not to send 'resize' messages to the game before we've
// told it that this canvas exists
if (! m_SuppressResize)
POST_MESSAGE(ResizeScreen, (
GetClientSize().GetWidth() * GetContentScaleFactor(),
GetClientSize().GetHeight() * GetContentScaleFactor()));
// TODO: fix flashing
}
void Canvas::InitSize()
{
m_SuppressResize = false;
SetSize(GetClientSize());
}
void Canvas::OnMouseCaptureLost(wxMouseCaptureLostEvent& WXUNUSED(evt))
{
// Mouse capture lost due to "external" event, like a dialog box or alt-tabbing
// (this is currently a Windows only event and failure to handle it will lead
// to an assertion failure in debug builds)
m_MouseCaptured = false;
// Because of this, it is never guaranteed that e.g. two LeftDown events will be
// separated by a LeftUp
}
void Canvas::OnMouse(wxMouseEvent& evt)
{
evt.SetX(evt.GetX() * GetContentScaleFactor());
evt.SetY(evt.GetY() * GetContentScaleFactor());
// Capture on button-down, so we can respond even when the mouse
// moves off the window
if (!m_MouseCaptured && evt.ButtonDown())
{
m_MouseCaptured = true;
CaptureMouse();
}
// Un-capture when all buttons are up
else if (m_MouseCaptured && evt.ButtonUp() &&
! (evt.ButtonIsDown(wxMOUSE_BTN_LEFT) || evt.ButtonIsDown(wxMOUSE_BTN_MIDDLE) || evt.ButtonIsDown(wxMOUSE_BTN_RIGHT))
)
{
m_MouseCaptured = false;
ReleaseMouse();
}
// Set focus when clicking
if (evt.ButtonDown())
SetFocus();
// Reject motion events if the mouse has not actually moved
if (evt.Moving() || evt.Dragging())
{
if (m_LastMousePos == evt.GetPosition())
return;
m_LastMousePos = evt.GetPosition();
}
HandleMouseEvent(evt);
}
BEGIN_EVENT_TABLE(Canvas, wxGLCanvas)
EVT_SIZE (Canvas::OnResize)
EVT_LEFT_DCLICK (Canvas::OnMouse)
EVT_LEFT_DOWN (Canvas::OnMouse)
EVT_LEFT_UP (Canvas::OnMouse)
EVT_RIGHT_DCLICK (Canvas::OnMouse)
EVT_RIGHT_DOWN (Canvas::OnMouse)
EVT_RIGHT_UP (Canvas::OnMouse)
EVT_MIDDLE_DCLICK (Canvas::OnMouse)
EVT_MIDDLE_DOWN (Canvas::OnMouse)
EVT_MIDDLE_UP (Canvas::OnMouse)
EVT_MOUSEWHEEL (Canvas::OnMouse)
EVT_MOTION (Canvas::OnMouse)
EVT_MOUSE_CAPTURE_LOST(Canvas::OnMouseCaptureLost)
END_EVENT_TABLE()
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