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673 lines
19 KiB
673 lines
19 KiB
/****************************************************************************
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**
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** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
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**
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** This file is part of an example program for TQt. This example
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** program may be used, distributed and modified without limitation.
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**
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*****************************************************************************/
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#include "showimg.h"
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#include "imagetexteditor.h"
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#include <ntqmenubar.h>
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#include <ntqfiledialog.h>
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#include <ntqmessagebox.h>
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#include <ntqpopupmenu.h>
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#include <ntqlabel.h>
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#include <ntqpainter.h>
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#include <ntqapplication.h>
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#include <ntqclipboard.h>
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/*
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In the constructor, we just pass the standard parameters on to
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TQWidget.
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The menu uses a single slot to simplify the process of adding
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more items to the options menu.
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*/
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ImageViewer::ImageViewer( TQWidget *parent, const char *name, int wFlags )
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: TQWidget( parent, name, wFlags ),
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conversion_flags( PreferDither ),
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helpmsg( 0 )
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{
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pickx = -1;
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picky = -1;
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clickx = -1;
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clicky = -1;
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alloc_context = 0;
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menubar = new TQMenuBar(this);
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menubar->setSeparator( TQMenuBar::InWindowsStyle );
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TQStrList fmt = TQImage::outputFormats();
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saveimage = new TQPopupMenu( menubar );
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savepixmap = new TQPopupMenu( menubar );
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for (const char* f = fmt.first(); f; f = fmt.next()) {
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saveimage->insertItem( f );
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savepixmap->insertItem( f );
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}
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connect( saveimage, SIGNAL(activated(int)), this, SLOT(saveImage(int)) );
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connect( savepixmap, SIGNAL(activated(int)), this, SLOT(savePixmap(int)) );
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file = new TQPopupMenu( menubar );
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menubar->insertItem( "&File", file );
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file->insertItem( "&New window", this, SLOT(newWindow()), CTRL+Key_N );
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file->insertItem( "&Open...", this, SLOT(openFile()), CTRL+Key_O );
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si = file->insertItem( "Save image", saveimage );
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sp = file->insertItem( "Save pixmap", savepixmap );
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file->insertSeparator();
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file->insertItem( "E&xit", tqApp, SLOT(quit()), CTRL+Key_Q );
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edit = new TQPopupMenu( menubar );
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menubar->insertItem( "&Edit", edit );
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edit->insertItem("&Copy", this, SLOT(copy()), CTRL+Key_C);
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edit->insertItem("&Paste", this, SLOT(paste()), CTRL+Key_V);
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edit->insertSeparator();
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edit->insertItem("&Horizontal flip", this, SLOT(hFlip()), ALT+Key_H);
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edit->insertItem("&Vertical flip", this, SLOT(vFlip()), ALT+Key_V);
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edit->insertItem("&Rotate 180", this, SLOT(rot180()), ALT+Key_R);
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edit->insertSeparator();
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edit->insertItem("&Text...", this, SLOT(editText()));
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edit->insertSeparator();
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t1 = edit->insertItem( "Convert to &1 bit", this, SLOT(to1Bit()) );
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t8 = edit->insertItem( "Convert to &8 bit", this, SLOT(to8Bit()) );
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t32 = edit->insertItem( "Convert to &32 bit", this, SLOT(to32Bit()) );
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options = new TQPopupMenu( menubar );
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menubar->insertItem( "&Options", options );
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ac = options->insertItem( "AutoColor" );
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co = options->insertItem( "ColorOnly" );
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mo = options->insertItem( "MonoOnly" );
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options->insertSeparator();
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fd = options->insertItem( "DiffuseDither" );
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bd = options->insertItem( "OrderedDither" );
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td = options->insertItem( "ThresholdDither" );
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options->insertSeparator();
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ta = options->insertItem( "ThresholdAlphaDither" );
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ba = options->insertItem( "OrderedAlphaDither" );
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fa = options->insertItem( "DiffuseAlphaDither" );
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options->insertSeparator();
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ad = options->insertItem( "PreferDither" );
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dd = options->insertItem( "AvoidDither" );
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options->insertSeparator();
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ss = options->insertItem( "Smooth scaling" );
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cc = options->insertItem( "Use color context" );
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if ( TQApplication::colorSpec() == TQApplication::ManyColor )
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options->setItemEnabled( cc, FALSE );
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options->setCheckable( TRUE );
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setMenuItemFlags();
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menubar->insertSeparator();
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TQPopupMenu* help = new TQPopupMenu( menubar );
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menubar->insertItem( "&Help", help );
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help->insertItem( "Help!", this, SLOT(giveHelp()), CTRL+Key_H );
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connect( options, SIGNAL(activated(int)), this, SLOT(doOption(int)) );
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status = new TQLabel(this);
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status->setFrameStyle( TQFrame::WinPanel | TQFrame::Sunken );
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status->setFixedHeight( fontMetrics().height() + 4 );
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setMouseTracking( TRUE );
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}
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ImageViewer::~ImageViewer()
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{
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if ( alloc_context )
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TQColor::destroyAllocContext( alloc_context );
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if ( other == this )
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other = 0;
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}
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/*
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This function modifies the conversion_flags when an options menu item
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is selected, then ensures all menu items are up to date, and reconverts
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the image if possibly necessary.
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*/
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void ImageViewer::doOption(int item)
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{
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if ( item == ss || item == cc ) {
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// Toggle
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bool newbool = !options->isItemChecked(item);
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options->setItemChecked(item, newbool);
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// And reconvert...
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reconvertImage();
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repaint(image.hasAlphaBuffer()); // show image in widget
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return;
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}
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if ( options->isItemChecked( item ) ) return; // They are all radio buttons
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int ocf = conversion_flags;
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if ( item == ac ) {
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conversion_flags = ( conversion_flags & ~ColorMode_Mask ) | AutoColor;
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} else if ( item == co ) {
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conversion_flags = ( conversion_flags & ~ColorMode_Mask ) | ColorOnly;
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} else if ( item == mo ) {
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conversion_flags = ( conversion_flags & ~ColorMode_Mask ) | MonoOnly;
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} else if ( item == fd ) {
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conversion_flags = ( conversion_flags & ~Dither_Mask ) | DiffuseDither;
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} else if ( item == bd ) {
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conversion_flags = ( conversion_flags & ~Dither_Mask ) | OrderedDither;
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} else if ( item == td ) {
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conversion_flags = ( conversion_flags & ~Dither_Mask ) | ThresholdDither;
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} else if ( item == ta ) {
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conversion_flags = ( conversion_flags & ~AlphaDither_Mask ) | ThresholdAlphaDither;
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} else if ( item == fa ) {
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conversion_flags = ( conversion_flags & ~AlphaDither_Mask ) | DiffuseAlphaDither;
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} else if ( item == ba ) {
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conversion_flags = ( conversion_flags & ~AlphaDither_Mask ) | OrderedAlphaDither;
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} else if ( item == ad ) {
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conversion_flags = ( conversion_flags & ~DitherMode_Mask ) | PreferDither;
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} else if ( item == dd ) {
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conversion_flags = ( conversion_flags & ~DitherMode_Mask ) | AvoidDither;
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}
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if ( ocf != conversion_flags ) {
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setMenuItemFlags();
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// And reconvert...
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reconvertImage();
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repaint(image.hasAlphaBuffer()); // show image in widget
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}
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}
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/*
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Set the options menu to reflect the conversion_flags value.
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*/
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void ImageViewer::setMenuItemFlags()
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{
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// File
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bool valid_image = pm.size() != TQSize( 0, 0 );
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file->setItemEnabled( si, valid_image );
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file->setItemEnabled( sp, valid_image );
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// Edit
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edit->setItemEnabled( t1, image.depth() != 1 );
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edit->setItemEnabled( t8, image.depth() != 8 );
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edit->setItemEnabled( t32, image.depth() != 32 );
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// Options
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bool may_need_color_dithering =
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!valid_image
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|| image.depth() == 32 && TQPixmap::defaultDepth() < 24;
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bool may_need_dithering = may_need_color_dithering
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|| image.depth() > 1 && options->isItemChecked(mo)
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|| image.depth() > 1 && TQPixmap::defaultDepth() == 1;
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bool has_alpha_mask = !valid_image || image.hasAlphaBuffer();
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options->setItemEnabled( fd, may_need_dithering );
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options->setItemEnabled( bd, may_need_dithering );
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options->setItemEnabled( td, may_need_dithering );
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options->setItemEnabled( ta, has_alpha_mask );
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options->setItemEnabled( fa, has_alpha_mask );
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options->setItemEnabled( ba, has_alpha_mask );
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options->setItemEnabled( ad, may_need_color_dithering );
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options->setItemEnabled( dd, may_need_color_dithering );
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options->setItemChecked( ac, (conversion_flags & ColorMode_Mask) == AutoColor );
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options->setItemChecked( co, (conversion_flags & ColorMode_Mask) == ColorOnly );
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options->setItemChecked( mo, (conversion_flags & ColorMode_Mask) == MonoOnly );
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options->setItemChecked( fd, (conversion_flags & Dither_Mask) == DiffuseDither );
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options->setItemChecked( bd, (conversion_flags & Dither_Mask) == OrderedDither );
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options->setItemChecked( td, (conversion_flags & Dither_Mask) == ThresholdDither );
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options->setItemChecked( ta, (conversion_flags & AlphaDither_Mask) == ThresholdAlphaDither );
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options->setItemChecked( fa, (conversion_flags & AlphaDither_Mask) == DiffuseAlphaDither );
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options->setItemChecked( ba, (conversion_flags & AlphaDither_Mask) == OrderedAlphaDither );
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options->setItemChecked( ad, (conversion_flags & DitherMode_Mask) == PreferDither );
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options->setItemChecked( dd, (conversion_flags & DitherMode_Mask) == AvoidDither );
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}
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void ImageViewer::updateStatus()
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{
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if ( pm.size() == TQSize( 0, 0 ) ) {
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if ( !filename.isEmpty() )
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status->setText("Could not load image");
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else
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status->setText("No image - select Open from File menu.");
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} else {
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TQString message, moremsg;
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message.sprintf("%dx%d", image.width(), image.height());
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if ( pm.size() != pmScaled.size() ) {
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moremsg.sprintf(" [%dx%d]", pmScaled.width(),
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pmScaled.height());
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message += moremsg;
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}
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moremsg.sprintf(", %d bits ", image.depth());
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message += moremsg;
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if (image.valid(pickx,picky)) {
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moremsg.sprintf("(%d,%d)=#%0*x ",
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pickx, picky,
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image.hasAlphaBuffer() ? 8 : 6,
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image.pixel(pickx,picky));
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message += moremsg;
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}
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if ( image.numColors() > 0 ) {
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if (image.valid(pickx,picky)) {
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moremsg.sprintf(", %d/%d colors", image.pixelIndex(pickx,picky),
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image.numColors());
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} else {
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moremsg.sprintf(", %d colors", image.numColors());
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}
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message += moremsg;
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}
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if ( image.hasAlphaBuffer() ) {
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if ( image.depth() == 8 ) {
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int i;
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bool alpha[256];
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int nalpha=0;
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for (i=0; i<256; i++)
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alpha[i] = FALSE;
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for (i=0; i<image.numColors(); i++) {
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int alevel = image.color(i) >> 24;
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if (!alpha[alevel]) {
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alpha[alevel] = TRUE;
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nalpha++;
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}
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}
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moremsg.sprintf(", %d alpha levels", nalpha);
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} else {
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// Too many pixels to bother counting.
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moremsg = ", 8-bit alpha channel";
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}
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message += moremsg;
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}
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status->setText(message);
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}
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}
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/*
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This function saves the image.
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*/
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void ImageViewer::saveImage( int item )
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{
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const char* fmt = saveimage->text(item);
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TQString savefilename = TQFileDialog::getSaveFileName(TQString::null, TQString::null,
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this, filename);
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if ( !savefilename.isEmpty() )
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if ( !image.save( savefilename, fmt ) )
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TQMessageBox::warning( this, "Save failed", "Error saving file" );
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}
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/*
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This function saves the converted image.
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*/
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void ImageViewer::savePixmap( int item )
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{
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const char* fmt = savepixmap->text(item);
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TQString savefilename = TQFileDialog::getSaveFileName(TQString::null,
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TQString::null, this, filename);
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if ( !savefilename.isEmpty() )
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if ( !pmScaled.save( savefilename, fmt ) )
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TQMessageBox::warning( this, "Save failed", "Error saving file" );
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}
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void ImageViewer::newWindow()
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{
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ImageViewer* that = new ImageViewer(0, "new window", WDestructiveClose);
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that->options->setItemChecked( that->cc, useColorContext() );
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that->show();
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}
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/*
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This function is the slot for processing the Open menu item.
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*/
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void ImageViewer::openFile()
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{
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TQString newfilename = TQFileDialog::getOpenFileName( TQString::null,
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TQString::null,
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this );
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if ( !newfilename.isEmpty() ) {
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loadImage( newfilename ) ;
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repaint(); // show image in widget
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}
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}
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/*
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This function loads an image from a file and resizes the widget to
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exactly fit the image size. If the file was not found or the image
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format was unknown it will resize the widget to fit the errorText
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message (see above) displayed in the current font.
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Returns TRUE if the image was successfully loaded.
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*/
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bool ImageViewer::loadImage( const TQString& fileName )
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{
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filename = fileName;
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bool ok = FALSE;
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if ( !filename.isEmpty() ) {
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TQApplication::setOverrideCursor( waitCursor ); // this might take time
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ok = image.load(filename, 0);
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pickx = -1;
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clickx = -1;
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if ( ok )
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ok = reconvertImage();
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if ( ok ) {
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setCaption( filename ); // set window caption
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int w = pm.width();
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int h = pm.height();
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const int reasonable_width = 128;
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if ( w < reasonable_width ) {
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// Integer scale up to something reasonable
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int multiply = ( reasonable_width + w - 1 ) / w;
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w *= multiply;
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h *= multiply;
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}
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h += menubar->heightForWidth(w) + status->height();
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resize( w, h ); // we resize to fit image
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} else {
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pm.resize(0,0); // couldn't load image
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update();
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}
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TQApplication::restoreOverrideCursor(); // restore original cursor
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}
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updateStatus();
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setMenuItemFlags();
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return ok;
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}
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bool ImageViewer::reconvertImage()
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{
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bool success = FALSE;
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if ( image.isNull() ) return FALSE;
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if ( alloc_context ) {
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TQColor::destroyAllocContext( alloc_context );
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alloc_context = 0;
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}
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if ( useColorContext() ) {
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alloc_context = TQColor::enterAllocContext();
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// Clear the image to hide flickering palette
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TQPainter painter(this);
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painter.eraseRect(0, menubar->heightForWidth( width() ), width(), height());
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}
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TQApplication::setOverrideCursor( waitCursor ); // this might take time
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if ( pm.convertFromImage(image, conversion_flags) )
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{
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pmScaled = TQPixmap();
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scale();
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resize( width(), height() );
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success = TRUE; // load successful
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} else {
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pm.resize(0,0); // couldn't load image
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}
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updateStatus();
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setMenuItemFlags();
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TQApplication::restoreOverrideCursor(); // restore original cursor
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if ( useColorContext() )
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TQColor::leaveAllocContext();
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return success; // TRUE if loaded OK
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}
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bool ImageViewer::smooth() const
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{
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return options->isItemChecked(ss);
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}
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bool ImageViewer::useColorContext() const
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{
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return options->isItemChecked(cc);
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}
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/*
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This functions scales the pixmap in the member variable "pm" to fit the
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widget size and puts the resulting pixmap in the member variable "pmScaled".
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*/
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void ImageViewer::scale()
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{
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int h = height() - menubar->heightForWidth( width() ) - status->height();
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if ( image.isNull() ) return;
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TQApplication::setOverrideCursor( waitCursor ); // this might take time
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if ( width() == pm.width() && h == pm.height() )
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{ // no need to scale if widget
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pmScaled = pm; // size equals pixmap size
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} else {
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if (smooth()) {
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pmScaled.convertFromImage(image.smoothScale(width(), h),
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conversion_flags);
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} else {
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TQWMatrix m; // transformation matrix
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m.scale(((double)width())/pm.width(),// define scale factors
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((double)h)/pm.height());
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pmScaled = pm.xForm( m ); // create scaled pixmap
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}
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}
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TQApplication::restoreOverrideCursor(); // restore original cursor
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}
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/*
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The resize event handler, if a valid pixmap was loaded it will call
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scale() to fit the pixmap to the new widget size.
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*/
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void ImageViewer::resizeEvent( TQResizeEvent * )
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{
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status->setGeometry(0, height() - status->height(),
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width(), status->height());
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if ( pm.size() == TQSize( 0, 0 ) ) // we couldn't load the image
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return;
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int h = height() - menubar->heightForWidth( width() ) - status->height();
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if ( width() != pmScaled.width() || h != pmScaled.height())
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{ // if new size,
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scale(); // scale pmScaled to window
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updateStatus();
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}
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if ( image.hasAlphaBuffer() )
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erase();
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}
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bool ImageViewer::convertEvent( TQMouseEvent* e, int& x, int& y)
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{
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if ( pm.size() != TQSize( 0, 0 ) ) {
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int h = height() - menubar->heightForWidth( width() ) - status->height();
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int nx = e->x() * image.width() / width();
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int ny = (e->y()-menubar->heightForWidth( width() )) * image.height() / h;
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if (nx != x || ny != y ) {
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x = nx;
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y = ny;
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updateStatus();
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return TRUE;
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}
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}
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return FALSE;
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}
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void ImageViewer::mousePressEvent( TQMouseEvent *e )
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{
|
|
may_be_other = convertEvent(e, clickx, clicky);
|
|
}
|
|
|
|
void ImageViewer::mouseReleaseEvent( TQMouseEvent * )
|
|
{
|
|
if ( may_be_other )
|
|
other = this;
|
|
}
|
|
|
|
/*
|
|
Record the pixel position of interest.
|
|
*/
|
|
void ImageViewer::mouseMoveEvent( TQMouseEvent *e )
|
|
{
|
|
if (convertEvent(e,pickx,picky)) {
|
|
updateStatus();
|
|
if ((e->state()&LeftButton)) {
|
|
may_be_other = FALSE;
|
|
if ( clickx >= 0 && other) {
|
|
copyFrom(other);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
Draws the portion of the scaled pixmap that needs to be updated or prints
|
|
an error message if no legal pixmap has been loaded.
|
|
*/
|
|
|
|
void ImageViewer::paintEvent( TQPaintEvent *e )
|
|
{
|
|
if ( pm.size() != TQSize( 0, 0 ) ) { // is an image loaded?
|
|
TQPainter painter(this);
|
|
painter.setClipRect(e->rect());
|
|
painter.drawPixmap(0, menubar->heightForWidth( width() ), pmScaled);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
Explain anything that might be confusing.
|
|
*/
|
|
void ImageViewer::giveHelp()
|
|
{
|
|
if (!helpmsg) {
|
|
TQString helptext =
|
|
"<b>Usage:</b> <tt>showimg [-m] <i>filename ...</i></tt>"
|
|
"<blockquote>"
|
|
"<tt>-m</tt> - use <i>ManyColor</i> color spec"
|
|
"</blockquote>"
|
|
"<p>Supported input formats:"
|
|
"<blockquote>";
|
|
helptext += TQImage::inputFormatList().join(", ");
|
|
helptext += "</blockquote>";
|
|
|
|
helpmsg = new TQMessageBox( "Help", helptext,
|
|
TQMessageBox::Information, TQMessageBox::Ok, 0, 0, 0, 0, FALSE );
|
|
}
|
|
helpmsg->show();
|
|
helpmsg->raise();
|
|
}
|
|
|
|
void ImageViewer::copyFrom(ImageViewer* s)
|
|
{
|
|
if ( clickx >= 0 ) {
|
|
int dx = clickx;
|
|
int dy = clicky;
|
|
int sx = s->clickx;
|
|
int sy = s->clicky;
|
|
int sw = TQABS(clickx - pickx)+1;
|
|
int sh = TQABS(clicky - picky)+1;
|
|
if ( clickx > pickx ) {
|
|
dx = pickx;
|
|
sx -= sw-1;
|
|
}
|
|
if ( clicky > picky ) {
|
|
dy = picky;
|
|
sy -= sh-1;
|
|
}
|
|
bitBlt( &image, dx, dy, &s->image, sx, sy, sw, sh );
|
|
reconvertImage();
|
|
repaint( image.hasAlphaBuffer() );
|
|
}
|
|
}
|
|
ImageViewer* ImageViewer::other = 0;
|
|
|
|
void ImageViewer::hFlip()
|
|
{
|
|
setImage(image.mirror(TRUE,FALSE));
|
|
}
|
|
|
|
void ImageViewer::vFlip()
|
|
{
|
|
setImage(image.mirror(FALSE,TRUE));
|
|
}
|
|
|
|
void ImageViewer::rot180()
|
|
{
|
|
setImage(image.mirror(TRUE,TRUE));
|
|
}
|
|
|
|
void ImageViewer::copy()
|
|
{
|
|
#ifndef QT_NO_MIMECLIPBOARD
|
|
TQApplication::clipboard()->setImage(image); // Less information loss
|
|
#endif
|
|
}
|
|
|
|
void ImageViewer::paste()
|
|
{
|
|
#ifndef QT_NO_MIMECLIPBOARD
|
|
TQImage p = TQApplication::clipboard()->image();
|
|
if ( !p.isNull() ) {
|
|
filename = "pasted";
|
|
setImage(p);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void ImageViewer::setImage(const TQImage& newimage)
|
|
{
|
|
image = newimage;
|
|
|
|
pickx = -1;
|
|
clickx = -1;
|
|
setCaption( filename ); // set window caption
|
|
int w = image.width();
|
|
int h = image.height();
|
|
if ( !w )
|
|
return;
|
|
|
|
const int reasonable_width = 128;
|
|
if ( w < reasonable_width ) {
|
|
// Integer scale up to something reasonable
|
|
int multiply = ( reasonable_width + w - 1 ) / w;
|
|
w *= multiply;
|
|
h *= multiply;
|
|
}
|
|
|
|
h += menubar->heightForWidth(w) + status->height();
|
|
resize( w, h ); // we resize to fit image
|
|
|
|
reconvertImage();
|
|
repaint( image.hasAlphaBuffer() );
|
|
|
|
updateStatus();
|
|
setMenuItemFlags();
|
|
}
|
|
|
|
void ImageViewer::editText()
|
|
{
|
|
ImageTextEditor editor(image,this);
|
|
editor.exec();
|
|
}
|
|
|
|
void ImageViewer::to1Bit()
|
|
{
|
|
toBitDepth(1);
|
|
}
|
|
|
|
void ImageViewer::to8Bit()
|
|
{
|
|
toBitDepth(8);
|
|
}
|
|
|
|
void ImageViewer::to32Bit()
|
|
{
|
|
toBitDepth(32);
|
|
}
|
|
|
|
void ImageViewer::toBitDepth(int d)
|
|
{
|
|
image = image.convertDepth(d);
|
|
reconvertImage();
|
|
repaint( image.hasAlphaBuffer() );
|
|
}
|