| 1 | /****************************************************************************
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| 2 | ** $Id: scrollview.cpp 2 2005-11-16 15:49:26Z dmik $
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| 3 | **
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| 4 | ** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
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| 5 | **
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| 6 | ** This file is part of an example program for Qt. This example
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| 7 | ** program may be used, distributed and modified without limitation.
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| 8 | **
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| 9 | *****************************************************************************/
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| 10 |
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| 11 | #include <qscrollview.h>
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| 12 | #include <qapplication.h>
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| 13 | #include <qmenubar.h>
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| 14 | #include <qpopupmenu.h>
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| 15 | #include <qpushbutton.h>
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| 16 | #include <qpainter.h>
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| 17 | #include <qpixmap.h>
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| 18 | #include <qmessagebox.h>
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| 19 | #include <qlayout.h>
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| 20 | #include <qlabel.h>
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| 21 | #include <qmultilineedit.h>
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| 22 | #include <qsizegrip.h>
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| 23 | #include <stdlib.h>
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| 24 |
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| 25 |
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| 26 | static const int style_id = 0x1000;
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| 27 | static const int lw_id = 0x2000;
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| 28 | static const int mlw_id = 0x4000;
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| 29 | static const int mw_id = 0x8000;
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| 30 | static const int max_lw = 16;
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| 31 | static const int max_mlw = 5;
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| 32 | static const int max_mw = 10;
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| 33 |
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| 34 |
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| 35 | class BigShrinker : public QFrame {
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| 36 | Q_OBJECT
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| 37 | public:
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| 38 | BigShrinker(QWidget* parent) :
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| 39 | QFrame(parent)
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| 40 | {
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| 41 | setFrameStyle(QFrame::Box|QFrame::Sunken);
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| 42 | int h=35;
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| 43 | int b=0;
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| 44 | for (int y=0; y<2000-h; y+=h+10) {
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| 45 | if (y == 0) {
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| 46 | QButton* q=new QPushButton("Quit", this);
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| 47 | connect(q, SIGNAL(clicked()), qApp, SLOT(quit()));
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| 48 | } else {
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| 49 | QString str;
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| 50 | if ( b > 0 ) {
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| 51 | str.sprintf("Button %d", b++);
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| 52 | } else {
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| 53 | str = "I'm shrinking!";
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| 54 | ++b;
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| 55 | }
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| 56 | (new QPushButton(str, this))->move(y/2,y);
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| 57 | }
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| 58 | }
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| 59 | resize(1000,2000);
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| 60 |
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| 61 | startTimer(250);
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| 62 | }
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| 63 |
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| 64 | void timerEvent(QTimerEvent*)
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| 65 | {
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| 66 | int w=width();
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| 67 | int h=height();
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| 68 | if ( w > 50 ) w -= 1;
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| 69 | if ( h > 50 ) h -= 2;
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| 70 | resize(w,h);
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| 71 | }
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| 72 |
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| 73 | void mouseReleaseEvent(QMouseEvent* e)
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| 74 | {
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| 75 | emit clicked(e->x(), e->y());
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| 76 | }
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| 77 |
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| 78 | signals:
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| 79 | void clicked(int,int);
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| 80 | };
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| 81 |
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| 82 | class BigMatrix : public QScrollView {
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| 83 | QMultiLineEdit *dragging;
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| 84 | public:
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| 85 | BigMatrix(QWidget* parent) :
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| 86 | QScrollView(parent,"matrix", WStaticContents),
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| 87 | bg("bg.ppm")
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| 88 | {
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| 89 | bg.load("bg.ppm");
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| 90 | resizeContents(400000,300000);
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| 91 |
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| 92 | dragging = 0;
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| 93 | }
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| 94 |
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| 95 | void viewportMousePressEvent(QMouseEvent* e)
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| 96 | {
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| 97 | int x, y;
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| 98 | viewportToContents( e->x(), e->y(), x, y );
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| 99 | dragging = new QMultiLineEdit(viewport(),"Another");
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| 100 | dragging->setText("Thanks!");
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| 101 | dragging->resize(100,100);
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| 102 | addChild(dragging, x, y);
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| 103 | showChild(dragging);
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| 104 | }
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| 105 |
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| 106 | void viewportMouseReleaseEvent(QMouseEvent*)
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| 107 | {
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| 108 | dragging = 0;
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| 109 | }
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| 110 |
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| 111 | void viewportMouseMoveEvent(QMouseEvent* e)
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| 112 | {
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| 113 | if ( dragging ) {
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| 114 | int mx, my;
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| 115 | viewportToContents( e->x(), e->y(), mx, my );
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| 116 | int cx = childX(dragging);
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| 117 | int cy = childY(dragging);
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| 118 | int w = mx - cx + 1;
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| 119 | int h = my - cy + 1;
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| 120 | QString msg;
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| 121 | msg.sprintf("at (%d,%d) %d by %d",cx,cy,w,h);
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| 122 | dragging->setText(msg);
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| 123 | dragging->resize(w,h);
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| 124 | }
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| 125 | }
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| 126 |
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| 127 | protected:
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| 128 | void drawContents(QPainter* p, int cx, int cy, int cw, int ch)
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| 129 | {
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| 130 | // The Background
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| 131 | if ( !bg.isNull() ) {
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| 132 | int rowheight=bg.height();
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| 133 | int toprow=cy/rowheight;
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| 134 | int bottomrow=(cy+ch+rowheight-1)/rowheight;
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| 135 | int colwidth=bg.width();
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| 136 | int leftcol=cx/colwidth;
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| 137 | int rightcol=(cx+cw+colwidth-1)/colwidth;
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| 138 | for (int r=toprow; r<=bottomrow; r++) {
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| 139 | int py=r*rowheight;
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| 140 | for (int c=leftcol; c<=rightcol; c++) {
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| 141 | int px=c*colwidth;
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| 142 | p->drawPixmap(px, py, bg);
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| 143 | }
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| 144 | }
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| 145 | } else {
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| 146 | p->fillRect(cx, cy, cw, ch, QColor(240,222,208));
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| 147 | }
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| 148 |
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| 149 | // The Numbers
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| 150 | {
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| 151 | QFontMetrics fm=p->fontMetrics();
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| 152 | int rowheight=fm.lineSpacing();
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| 153 | int toprow=cy/rowheight;
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| 154 | int bottomrow=(cy+ch+rowheight-1)/rowheight;
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| 155 | int colwidth=fm.width("00000,000000 ")+3;
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| 156 | int leftcol=cx/colwidth;
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| 157 | int rightcol=(cx+cw+colwidth-1)/colwidth;
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| 158 | QString str;
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| 159 | for (int r=toprow; r<=bottomrow; r++) {
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| 160 | int py=r*rowheight;
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| 161 | for (int c=leftcol; c<=rightcol; c++) {
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| 162 | int px=c*colwidth;
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| 163 | str.sprintf("%d,%d",c,r);
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| 164 | p->drawText(px+3, py+fm.ascent(), str);
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| 165 | }
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| 166 | }
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| 167 |
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| 168 | // The Big Hint
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| 169 | if (leftcol<10 && toprow<5) {
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| 170 | p->setFont(QFont("Charter",30));
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| 171 | p->setPen(red);
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| 172 | QString text;
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| 173 | text.sprintf("HINT: Look at %d,%d",215000/colwidth,115000/rowheight);
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| 174 | p->drawText(100,50,text);
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| 175 | }
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| 176 | }
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| 177 |
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| 178 | // The Big X
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| 179 | {
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| 180 | if (cx+cw>200000 && cy+ch>100000 && cx<230000 && cy<130000) {
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| 181 | // Note that some X server cannot even handle co-ordinates
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| 182 | // beyond about 4000, so you might not see this.
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| 183 | p->drawLine(200000,100000,229999,129999);
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| 184 | p->drawLine(229999,100000,200000,129999);
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| 185 |
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| 186 | // X marks the spot!
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| 187 | p->setFont(QFont("Charter",100));
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| 188 | p->setPen(blue);
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| 189 | p->drawText(215000-500,115000-100,1000,200,AlignCenter,"YOU WIN!!!!!");
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| 190 | }
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| 191 | }
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| 192 | }
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| 193 |
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| 194 | private:
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| 195 | QPixmap bg;
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| 196 | };
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| 197 |
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| 198 | class ScrollViewExample : public QWidget {
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| 199 | Q_OBJECT
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| 200 |
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| 201 | public:
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| 202 | ScrollViewExample(int technique, QWidget* parent=0, const char* name=0) :
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| 203 | QWidget(parent,name)
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| 204 | {
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| 205 | QMenuBar* menubar = new QMenuBar(this);
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| 206 | Q_CHECK_PTR( menubar );
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| 207 |
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| 208 | QPopupMenu* file = new QPopupMenu( menubar );
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| 209 | Q_CHECK_PTR( file );
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| 210 | menubar->insertItem( "&File", file );
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| 211 | file->insertItem( "Quit", qApp, SLOT(quit()) );
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| 212 |
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| 213 | vp_options = new QPopupMenu( menubar );
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| 214 | Q_CHECK_PTR( vp_options );
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| 215 | vp_options->setCheckable( TRUE );
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| 216 | menubar->insertItem( "&ScrollView", vp_options );
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| 217 | connect( vp_options, SIGNAL(activated(int)),
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| 218 | this, SLOT(doVPMenuItem(int)) );
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| 219 |
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| 220 | vauto_id = vp_options->insertItem( "Vertical Auto" );
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| 221 | vaoff_id = vp_options->insertItem( "Vertical AlwaysOff" );
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| 222 | vaon_id = vp_options->insertItem( "Vertical AlwaysOn" );
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| 223 | vp_options->insertSeparator();
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| 224 | hauto_id = vp_options->insertItem( "Horizontal Auto" );
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| 225 | haoff_id = vp_options->insertItem( "Horizontal AlwaysOff" );
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| 226 | haon_id = vp_options->insertItem( "Horizontal AlwaysOn" );
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| 227 | vp_options->insertSeparator();
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| 228 | corn_id = vp_options->insertItem( "cornerWidget" );
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| 229 |
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| 230 | if (technique == 1) {
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| 231 | vp = new QScrollView(this);
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| 232 | BigShrinker *bs = new BigShrinker(0);//(vp->viewport());
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| 233 | vp->addChild(bs);
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| 234 | bs->setAcceptDrops(TRUE);
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| 235 | QObject::connect(bs, SIGNAL(clicked(int,int)),
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| 236 | vp, SLOT(center(int,int)));
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| 237 | } else {
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| 238 | vp = new BigMatrix(this);
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| 239 | if ( technique == 3 )
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| 240 | vp->enableClipper(TRUE);
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| 241 | srand(1);
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| 242 | for (int i=0; i<30; i++) {
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| 243 | QMultiLineEdit *l = new QMultiLineEdit(vp->viewport(),"First");
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| 244 | l->setText("Drag out more of these.");
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| 245 | l->resize(100,100);
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| 246 | vp->addChild(l, rand()%800, rand()%10000);
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| 247 | }
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| 248 | vp->viewport()->setBackgroundMode(NoBackground);
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| 249 | }
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| 250 |
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| 251 | f_options = new QPopupMenu( menubar );
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| 252 | Q_CHECK_PTR( f_options );
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| 253 | f_options->setCheckable( TRUE );
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| 254 | menubar->insertItem( "F&rame", f_options );
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| 255 | connect( f_options, SIGNAL(activated(int)),
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| 256 | this, SLOT(doFMenuItem(int)) );
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| 257 |
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| 258 | f_options->insertItem( "No Frame", style_id );
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| 259 | f_options->insertItem( "Box", style_id|QFrame::Box );
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| 260 | f_options->insertItem( "Panel", style_id|QFrame::Panel );
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| 261 | f_options->insertItem( "WinPanel", style_id|QFrame::WinPanel );
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| 262 | f_options->insertSeparator();
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| 263 | f_options->insertItem( "Plain", style_id|QFrame::Plain );
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| 264 | f_options->insertItem( "Raised", style_id|QFrame::Raised );
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| 265 | f_laststyle = f_options->indexOf(
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| 266 | f_options->insertItem( "Sunken", style_id|QFrame::Sunken ));
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| 267 | f_options->insertSeparator();
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| 268 | lw_options = new QPopupMenu( menubar );
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| 269 | Q_CHECK_PTR( lw_options );
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| 270 | lw_options->setCheckable( TRUE );
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| 271 | for (int lw = 1; lw <= max_lw; lw++) {
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| 272 | QString str;
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| 273 | str.sprintf("%d Pixels", lw);
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| 274 | lw_options->insertItem( str, lw_id | lw );
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| 275 | }
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| 276 | f_options->insertItem( "Line Width", lw_options );
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| 277 | connect( lw_options, SIGNAL(activated(int)),
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| 278 | this, SLOT(doFMenuItem(int)) );
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| 279 | mlw_options = new QPopupMenu( menubar );
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| 280 | Q_CHECK_PTR( mlw_options );
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| 281 | mlw_options->setCheckable( TRUE );
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| 282 | for (int mlw = 0; mlw <= max_mlw; mlw++) {
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| 283 | QString str;
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| 284 | str.sprintf("%d Pixels", mlw);
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| 285 | mlw_options->insertItem( str, mlw_id | mlw );
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| 286 | }
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| 287 | f_options->insertItem( "Midline Width", mlw_options );
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| 288 | connect( mlw_options, SIGNAL(activated(int)),
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| 289 | this, SLOT(doFMenuItem(int)) );
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| 290 | mw_options = new QPopupMenu( menubar );
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| 291 | Q_CHECK_PTR( mw_options );
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| 292 | mw_options->setCheckable( TRUE );
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| 293 | for (int mw = 0; mw <= max_mw; mw++) {
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| 294 | QString str;
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| 295 | str.sprintf("%d Pixels", mw);
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| 296 | mw_options->insertItem( str, mw_id | mw );
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| 297 | }
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| 298 | f_options->insertItem( "Margin Width", mw_options );
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| 299 | connect( mw_options, SIGNAL(activated(int)),
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| 300 | this, SLOT(doFMenuItem(int)) );
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| 301 |
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| 302 | setVPMenuItems();
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| 303 | setFMenuItems();
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| 304 |
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| 305 | QVBoxLayout* vbox = new QVBoxLayout(this);
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| 306 | vbox->setMenuBar(menubar);
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| 307 | menubar->setSeparator(QMenuBar::InWindowsStyle);
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| 308 | vbox->addWidget(vp);
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| 309 | vbox->activate();
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| 310 |
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| 311 | corner = new QSizeGrip(this);
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| 312 | corner->hide();
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| 313 | }
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| 314 |
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| 315 | private slots:
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| 316 | void doVPMenuItem(int id)
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| 317 | {
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| 318 | if (id == vauto_id ) {
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| 319 | vp->setVScrollBarMode(QScrollView::Auto);
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| 320 | } else if (id == vaoff_id) {
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| 321 | vp->setVScrollBarMode(QScrollView::AlwaysOff);
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| 322 | } else if (id == vaon_id) {
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| 323 | vp->setVScrollBarMode(QScrollView::AlwaysOn);
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| 324 | } else if (id == hauto_id) {
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| 325 | vp->setHScrollBarMode(QScrollView::Auto);
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| 326 | } else if (id == haoff_id) {
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| 327 | vp->setHScrollBarMode(QScrollView::AlwaysOff);
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| 328 | } else if (id == haon_id) {
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| 329 | vp->setHScrollBarMode(QScrollView::AlwaysOn);
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| 330 | } else if (id == corn_id) {
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| 331 | bool corn = !vp->cornerWidget();
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| 332 | vp->setCornerWidget(corn ? corner : 0);
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| 333 | } else {
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| 334 | return; // Not for us to process.
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| 335 | }
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| 336 | setVPMenuItems();
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| 337 | }
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| 338 |
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| 339 | void setVPMenuItems()
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| 340 | {
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| 341 | QScrollView::ScrollBarMode vm = vp->vScrollBarMode();
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| 342 | vp_options->setItemChecked( vauto_id, vm == QScrollView::Auto );
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| 343 | vp_options->setItemChecked( vaoff_id, vm == QScrollView::AlwaysOff );
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| 344 | vp_options->setItemChecked( vaon_id, vm == QScrollView::AlwaysOn );
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| 345 |
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| 346 | QScrollView::ScrollBarMode hm = vp->hScrollBarMode();
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| 347 | vp_options->setItemChecked( hauto_id, hm == QScrollView::Auto );
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| 348 | vp_options->setItemChecked( haoff_id, hm == QScrollView::AlwaysOff );
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| 349 | vp_options->setItemChecked( haon_id, hm == QScrollView::AlwaysOn );
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| 350 |
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| 351 | vp_options->setItemChecked( corn_id, !!vp->cornerWidget() );
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| 352 | }
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| 353 |
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| 354 | void doFMenuItem(int id)
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| 355 | {
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| 356 | if (id & style_id) {
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| 357 | int sty;
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| 358 |
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| 359 | if (id == style_id) {
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| 360 | sty = 0;
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| 361 | } else if (id & QFrame::MShape) {
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| 362 | sty = vp->frameStyle()&QFrame::MShadow;
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| 363 | sty = (sty ? sty : QFrame::Plain) | (id&QFrame::MShape);
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| 364 | } else {
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| 365 | sty = vp->frameStyle()&QFrame::MShape;
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| 366 | sty = (sty ? sty : QFrame::Box) | (id&QFrame::MShadow);
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| 367 | }
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| 368 | vp->setFrameStyle(sty);
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| 369 | } else if (id & lw_id) {
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| 370 | vp->setLineWidth(id&~lw_id);
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| 371 | } else if (id & mlw_id) {
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| 372 | vp->setMidLineWidth(id&~mlw_id);
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| 373 | } else {
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| 374 | vp->setMargin(id&~mw_id);
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| 375 | }
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| 376 |
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| 377 | vp->update();
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| 378 | setFMenuItems();
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| 379 | }
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| 380 |
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| 381 | void setFMenuItems()
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| 382 | {
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| 383 | int sty = vp->frameStyle();
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| 384 |
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| 385 | f_options->setItemChecked( style_id, !sty );
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| 386 |
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| 387 | for (int i=1; i <= f_laststyle; i++) {
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| 388 | int id = f_options->idAt(i);
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| 389 | if (id & QFrame::MShape)
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| 390 | f_options->setItemChecked( id,
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| 391 | ((id&QFrame::MShape) == (sty&QFrame::MShape)) );
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| 392 | else
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| 393 | f_options->setItemChecked( id,
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| 394 | ((id&QFrame::MShadow) == (sty&QFrame::MShadow)) );
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| 395 | }
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| 396 |
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| 397 | for (int lw=1; lw<=max_lw; lw++)
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| 398 | lw_options->setItemChecked( lw_id|lw, vp->lineWidth() == lw );
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| 399 |
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| 400 | for (int mlw=0; mlw<=max_mlw; mlw++)
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| 401 | mlw_options->setItemChecked( mlw_id|mlw, vp->midLineWidth() == mlw );
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| 402 |
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| 403 | for (int mw=0; mw<=max_mw; mw++)
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| 404 | mw_options->setItemChecked( mw_id|mw, vp->margin() == mw );
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| 405 | }
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| 406 |
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| 407 | private:
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| 408 | QScrollView* vp;
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| 409 | QPopupMenu* vp_options;
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| 410 | QPopupMenu* f_options;
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| 411 | QPopupMenu* lw_options;
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| 412 | QPopupMenu* mlw_options;
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| 413 | QPopupMenu* mw_options;
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| 414 | QSizeGrip* corner;
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| 415 |
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| 416 | int vauto_id, vaoff_id, vaon_id,
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| 417 | hauto_id, haoff_id, haon_id,
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| 418 | corn_id;
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| 419 |
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| 420 | int f_laststyle;
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| 421 | };
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| 422 |
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| 423 | int main( int argc, char **argv )
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| 424 | {
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| 425 | QApplication a( argc, argv );
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| 426 |
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| 427 | ScrollViewExample ve1(1,0,"ve1");
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| 428 | ScrollViewExample ve2(2,0,"ve2");
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| 429 | ScrollViewExample ve3(3,0,"ve3");
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| 430 | ve1.setCaption("Qt Example - Scrollviews");
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| 431 | ve1.show();
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| 432 | ve2.setCaption("Qt Example - Scrollviews");
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| 433 | ve2.show();
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| 434 | ve3.setCaption("Qt Example - Scrollviews");
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| 435 | ve3.show();
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| 436 |
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| 437 | QObject::connect(qApp, SIGNAL(lastWindowClosed()), qApp, SLOT(quit()));
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| 438 |
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| 439 | return a.exec();
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| 440 | }
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| 441 |
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| 442 | #include "scrollview.moc"
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