From 651b6c612db4e809c506973996f2580c4158ac3a Mon Sep 17 00:00:00 2001
From: mickeyl <mickeyl>
Date: Sat, 27 Sep 2003 11:29:26 +0000
Subject: merge dasher which has been introduced in BRANCH first (wtf?) into HEAD

---
(limited to 'inputmethods/dasher/DasherViewSquare.cpp')

diff --git a/inputmethods/dasher/DasherViewSquare.cpp b/inputmethods/dasher/DasherViewSquare.cpp
new file mode 100644
index 0000000..1b12a58
--- a/dev/null
+++ b/inputmethods/dasher/DasherViewSquare.cpp
@@ -0,0 +1,229 @@
+// DasherViewSquare.cpp
+//
+/////////////////////////////////////////////////////////////////////////////
+//
+// Copyright (c) 2001-2002 David Ward
+//
+/////////////////////////////////////////////////////////////////////////////
+
+
+//////////////////////////////////////////////////////////////////////
+// DasherViewSquare.cpp: implementation of the DasherViewSquare class.
+// Copyright 2002 David Ward
+//////////////////////////////////////////////////////////////////////
+
+#include "DasherModel.h"
+#include "DasherViewSquare.h"
+#include <iostream>
+
+using namespace Dasher;
+
+// ARG! MSVC++ V6 doesn't seem to come with min and max in <algorithm>
+#ifdef _MSC_VER
+#ifndef max
+#define max(a,b) (((a) > (b)) ? (a) : (b))
+#endif
+#ifndef min
+#define min(a,b) (((a) < (b)) ? (a) : (b))
+#endif
+#else
+#include <algorithm>
+using std::min;
+using std::max;
+#endif
+
+
+CDasherViewSquare::CDasherViewSquare(CDasherScreen* DasherScreen, CDasherModel& DasherModel, Dasher::Opts::ScreenOrientations Orientation)
+	: CDasherView(DasherScreen, DasherModel, Orientation)
+{
+	ChangeScreen(DasherScreen);
+	
+	// tweak these if you know what you are doing
+	m_dXmpa=0.2;   // these are for the x non-linearity
+	m_dXmpb=0.5;
+	m_dXmpc=0.9;
+	m_dXmpd=0.5;   // slow X movement when accelerating Y
+
+	double dY1=0.25;    // Amount of acceleration
+	double dY2=0.95;    // Accelerate Y movement below this point
+	double dY3=0.05;    // Accelerate Y movement above this point
+
+	m_Y2=int (dY2 * (CDasherView::DasherModel().DasherY()) );
+	m_Y3=int (dY3 * (CDasherView::DasherModel().DasherY()) );
+	m_Y1=int(1.0/dY1);
+
+}
+
+
+int CDasherViewSquare::RenderNode(const symbol Character, const int Color, Opts::ColorSchemes ColorScheme,
+	myint y1, myint y2, int& mostleft, bool& force, bool text)
+{
+	int top = dashery2screen(y1);
+	if (top>CanvasY)
+		return 0;
+	if (top<0)
+		top=0;
+	
+	int bottom = dashery2screen(y2);
+	if (bottom<0)
+		return 0;
+	if (bottom>CanvasY)
+		bottom=CanvasY;
+	
+	int height=bottom-top;
+	
+	if (height==0 && text==true)
+		force=false;
+	
+	if (force || height>1) {
+		force=true;
+
+		int left=dasherx2screen(y2-y1);
+		
+		int right=CanvasX;
+		
+		int newleft=left, newtop=top, newright=right, newbottom=bottom;
+		MapScreen(&newleft, &newtop);
+		MapScreen(&newright, &newbottom);
+		if( !text )
+		  Screen().DrawRectangle(newleft, newtop, newright, newbottom, Color, ColorScheme);
+		else
+		  {
+		    if (left<mostleft)
+		      left=mostleft;
+		    
+		    int Size;
+		    if (left*Screen().GetFontSize()<CanvasX*19/20) {
+		      Size = 20*Screen().GetFontSize();
+		    } else if (left*Screen().GetFontSize()<CanvasX*159/160) {
+		      Size = 14*Screen().GetFontSize();
+		    } else {
+		      Size = 11*Screen().GetFontSize();
+		    }
+		    
+		    int TextWidth, TextHeight, OriginX=0, OriginY=0;
+		    Screen().TextSize(Character, &TextWidth, &TextHeight, Size);
+		    UnMapScreen(&TextWidth, &TextHeight);
+		    UnMapScreen(&OriginX, &OriginY);		
+		    int FontHeight = abs(TextHeight-OriginY);		
+		    int FontWidth = abs(TextWidth-OriginX);
+		    mostleft = left + FontWidth;
+		    
+		    int newleft2 = left;
+		    int newtop2 = (height-FontHeight)/2 + top;
+		    int newright2 = left + FontWidth;
+		    int newbottom2 = (height+FontHeight)/2 + top;
+		    MapScreen(&newleft2, &newtop2);
+		    MapScreen(&newright2, &newbottom2);
+		    newleft = min(newleft2, newright2);
+		    newtop = min(newtop2, newbottom2);
+		    
+		    Screen().DrawText(Character, newleft, newtop, Size);
+		  }
+		
+		return 1;
+	} else 
+		return 0;
+}
+
+
+void CDasherViewSquare::CheckForNewRoot()
+{
+	CDasherNode * const root=DasherModel().Root();
+	CDasherNode ** const children=root->Children();
+
+
+	myint y1=DasherModel().Rootmin();
+	myint y2=DasherModel().Rootmax();
+	
+	if ((y1>0 || y2 < DasherModel().DasherY() || dasherx2screen(y2-y1)>0) && root->Symbol()!=0) {
+	  DasherModel().Reparent_root(root->Lbnd(),root->Hbnd());
+	}
+	    
+	if (children==0)
+		return;
+
+	int alive=0;
+	int theone=0;
+	unsigned int i;
+	for (i=1;i<root->Chars();i++) {
+		if (children[i]->Alive()) {
+			alive++;
+			theone=i;
+		}
+	}
+	
+	if (alive==1) {	  
+	        y1=DasherModel().Rootmin();
+		y2=DasherModel().Rootmax();
+		myint range=y2-y1;
+		myint newy1=y1+(range*children[theone]->Lbnd())/DasherModel().Normalization();
+		myint newy2=y1+(range*children[theone]->Hbnd())/DasherModel().Normalization();
+		if (newy1<0 && newy2> DasherModel().DasherY()) {
+			myint left=dasherx2screen(newy2-newy1);
+			if (left<0) {
+				DasherModel().Make_root(theone);
+				return;
+			}
+		}
+	}
+}
+
+
+// work out the next viewpoint
+// move the rectangles accordingly
+void CDasherViewSquare::TapOnDisplay(int mousex,int mousey, unsigned long Time) 
+{
+	// convert mouse (screen) coords into dasher coords
+	if (mousex>CanvasX)
+		mousex=CanvasX;
+	
+	UnMapScreen(&mousex, &mousey);
+	screen2dasher(&mousex,&mousey);
+	DasherModel().Tap_on_display(mousex,mousey, Time);
+	CheckForNewRoot();
+}
+
+void CDasherViewSquare::DrawMouse(int mousex, int mousey)
+{
+	screen2dasher(&mousex,&mousey);
+	mousex=dasherx2screen(mousex);
+	mousey=dashery2screen(mousey);
+	Screen().DrawRectangle(mousex-5, mousey-5, mousex+5, mousey+5, 0, Opts::ColorSchemes(Objects));
+}
+
+void CDasherViewSquare::DrawKeyboard()
+{
+  CDasherScreen::point line[2];
+  line[0].x = 200;
+  line[0].y = 0;
+  line[1].x = 200;
+  line[1].y = CanvasY/2;
+  
+  Screen().Polyline(line,2);
+
+  line[0].x = 200;
+  line[0].y = CanvasY/2;
+  line[1].x = 0;
+  line[1].y = CanvasY/2;
+
+  Screen().Polyline(line,2);
+
+  line[0].x = 200;
+  line[0].y = CanvasY/2;
+  line[1].x = 200;
+  line[1].y = CanvasY;
+
+  Screen().Polyline(line,2);
+}
+
+void CDasherViewSquare::ChangeScreen(CDasherScreen* NewScreen)
+{
+	CDasherView::ChangeScreen(NewScreen);
+	int Width = Screen().GetWidth();
+	int Height = Screen().GetHeight();
+	CanvasX=9*Width/10;
+	CanvasBorder=Width-CanvasX;
+	CanvasY=Height;
+}
+
--
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