// Copyright (c) 2007, Rodrigo Braz Monteiro
// All rights reserved.
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//     this list of conditions and the following disclaimer.
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// Aegisub Project http://www.aegisub.org/
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// $Id$

/// @file visual_tool_cross.cpp
/// @brief Crosshair double-click-to-position visual typesetting tool
/// @ingroup visual_ts
///


///////////
// Headers
#include "config.h"

#include "ass_file.h"
#include "gl_text.h"
#include "subs_edit_box.h"
#include "subs_grid.h"
#include "video_context.h"
#include "video_display.h"
#include "visual_tool_cross.h"


/// @brief Constructor 
/// @param _parent 
///
VisualToolCross::VisualToolCross(VideoDisplay *_parent)
: VisualTool(_parent)
{
	_parent->ShowCursor(false);
}



/// @brief Destructor 
///
VisualToolCross::~VisualToolCross() {
	GetParent()->ShowCursor(true);
}



/// @brief Update 
///
void VisualToolCross::Update() {
	// Position
	if (leftDClick) {
		int vx = (sw * mouseX + w/2) / w;
		int vy = (sh * mouseY + h/2) / h;
		SubtitlesGrid *grid = VideoContext::Get()->grid;
		SetOverride(_T("\\pos"),wxString::Format(_T("(%i,%i)"),vx,vy));
		grid->editBox->CommitText();
		grid->ass->FlagAsModified(_("positioning"));
		grid->CommitChanges(false,true);
	}

	// Render parent
	GetParent()->Render();
}



/// @brief Draw 
///
void VisualToolCross::Draw() {
	// Is it outside?
	if (mouseX == -1 || mouseY == -1) return;

	// Draw cross
	glDisable(GL_LINE_SMOOTH);
	glEnable(GL_COLOR_LOGIC_OP);
	glLogicOp(GL_INVERT);
	glLineWidth(1);
	glBegin(GL_LINES);
		glColor3f(1.0f,1.0f,1.0f);
		glVertex2f(0,my);
		glVertex2f(sw,my);
		glVertex2f(mx,0);
		glVertex2f(mx,sh);
	glEnd();
	glDisable(GL_COLOR_LOGIC_OP);

	// Switch display
	glMatrixMode(GL_PROJECTION);
	glPushMatrix();
	glLoadIdentity();
	glOrtho(0.0f,w,h,0.0f,-1000.0f,1000.0f);
	glMatrixMode(GL_MODELVIEW);

	// Text of current coords
	int dx = mouseX;
	int dy = mouseY;
	int vx = (sw * dx + w/2) / w;
	int vy = (sh * dy + h/2) / h;
	wxString mouseText;
	if (!wxGetMouseState().ShiftDown()) mouseText = wxString::Format(_T("%i,%i"),vx,vy);
	else mouseText = wxString::Format(_T("%i,%i"),vx - sw,vy - sh);

	// Setup gl text
	int tw,th;
	OpenGLText::SetFont(_T("Verdana"),12,true);
	OpenGLText::SetColour(wxColour(255,255,255));
	OpenGLText::GetExtent(mouseText,tw,th);

	// Calculate draw position
	bool left = dx > w/2;
	bool bottom = dy < h/2;

	// Text draw coords
	if (left) dx -= tw + 4;
	else dx += 4;
	if (bottom) dy += 3;
	else dy -= th + 3;

	// Draw text
	OpenGLText::Print(mouseText,dx,dy);

	// Restore matrix
	glMatrixMode(GL_PROJECTION);
	glPopMatrix();
	glMatrixMode(GL_MODELVIEW);
}