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Diffstat (limited to 'examples/viewer-qt.cc')
| -rw-r--r-- | examples/viewer-qt.cc | 528 |
1 files changed, 0 insertions, 528 deletions
diff --git a/examples/viewer-qt.cc b/examples/viewer-qt.cc deleted file mode 100644 index 1ec8262f..00000000 --- a/examples/viewer-qt.cc +++ /dev/null @@ -1,528 +0,0 @@ -/* Pango - * viewer-qt.cc: Example program to view a UTF-8 encoding file - * using Pango to render result. - * - * Copyright (C) 1999-2000 Red Hat Software - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library 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 - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 02111-1307, USA. - */ - -#include <string.h> -#include <stdlib.h> -#include <stdio.h> - -#include <qapplication.h> -#include <qcombobox.h> -#include <qfile.h> -#include <qfileinfo.h> -#include <qmenubar.h> -#include <qpainter.h> -#include <qpopupmenu.h> -#include <qspinbox.h> -#include <qscrollview.h> -#include <qstatusbar.h> -#include <qtextcodec.h> -#include <qtextstream.h> -#include <qtoolbar.h> - -#include <pango/pango.h> -#include <pango/pangox.h> - -#include "viewer-qt.h" - -ViewerPara::ViewerPara (PangoContext *context, const QString &text) -{ - text_ = text.utf8(); - - layout_ = pango_layout_new (context); - pango_layout_set_text (layout_, (char *)(const char *)text_, text_.length()); - height_ = -1; -} - -ViewerPara::~ViewerPara () -{ - g_object_unref (G_OBJECT (layout_)); -} - -void -ViewerPara::setWidth (int width) -{ - pango_layout_set_width (layout_, width * PANGO_SCALE); - height_ = -1; -} - -void -ViewerPara::contextChanged () -{ - pango_layout_context_changed (layout_); - height_ = -1; - - PangoContext *context; - PangoAlignment align; - - context = pango_layout_get_context (layout_); - if (pango_context_get_base_dir (context) == PANGO_DIRECTION_LTR) - align = PANGO_ALIGN_LEFT; - else - align = PANGO_ALIGN_RIGHT; - - pango_layout_set_alignment (layout_, align); -} - -int -ViewerPara::height () -{ - if (height_ < 0) - { - PangoRectangle logical_rect; - - pango_layout_get_extents (layout_, NULL, &logical_rect); - height_ = logical_rect.height / PANGO_SCALE; - } - - return height_; -} - -void -ViewerPara::draw (QPainter *painter, GC gc, int y) -{ - QPoint devicePt = painter->xForm (QPoint (0, y)); - - pango_x_render_layout (painter->device()->x11Display(), - painter->device()->handle(), - gc, layout_, 0, devicePt.y()); -} - -gunichar -ViewerPara::getChar (int index) -{ - gunichar result; - - return g_utf8_get_char ((const char *)text_ + index); -} - -QRect -ViewerPara::charBounds (int index) -{ - PangoRectangle pos; - - pango_layout_index_to_pos (layout_, index, &pos); - - return QRect (MIN (pos.x, pos.x + pos.width) / PANGO_SCALE, - pos.y / PANGO_SCALE, - ABS (pos.width) / PANGO_SCALE, - pos.height / PANGO_SCALE); -} - -int -ViewerPara::findPoint (int x, int y) -{ - int index; - - bool result = pango_layout_xy_to_index (layout_, - x * PANGO_SCALE, y * PANGO_SCALE, - &index, NULL); - if (result) - return index; - else - return -1; -} - -ViewerView::ViewerView (QWidget *parent, QStatusBar *status) : QScrollView (parent) -{ - status_ = status; - - viewport()->setBackgroundMode( QWidget::PaletteBase ); - - setHScrollBarMode (QScrollView::AlwaysOff); - - context_ = pango_x_get_context (x11Display()); - pango_context_set_language (context_, pango_language_from_string ("en-us")); - - highlight_para_ = NULL; - highlight_index_ = 0; -} - -ViewerView::~ViewerView () -{ - g_object_unref (G_OBJECT (context_)); -} - -void -ViewerView::readFile (const QString &name) -{ - QFile file (name); - - if (!file.open (IO_ReadOnly)) - { - fprintf (stderr, "Cannot open file '%s'\n", (const char *)name.local8Bit()); - return; - } - - QTextStream ts (&file);; - - ts.setCodec (QTextCodec::codecForName ("utf8")); - - while (!ts.atEnd()) - paragraphs_.append (new ViewerPara (context (), ts.readLine())); -} - -void -ViewerView::contextChanged () -{ - QListIterator<ViewerPara> it(paragraphs_); - for (; it.current(); ++it) - it.current()->contextChanged(); - - computeHeight(); - updateContents (0, 0, contentsWidth(), contentsHeight()); -} - -void -ViewerView::setFontDesc (PangoFontDescription *font_desc) -{ - pango_context_set_font_description (context_, font_desc); - contextChanged(); -} - -void -ViewerView::setDirection (PangoDirection base_dir) -{ - QListIterator<ViewerPara> it(paragraphs_); - for (; it.current(); ++it) - it.current()->contextChanged(); - - pango_context_set_base_dir (context_, base_dir); - contextChanged(); -} - -void -ViewerView::drawContents (QPainter *p, int clipx, int clipy, int clipw, int cliph) -{ - XGCValues values; - QRect clip = p->xForm (QRect (clipx, clipy, clipw, cliph)); - - GC gc = XCreateGC (x11Display(), handle(), 0, &values); - - XSetForeground (x11Display(), gc, colorGroup().text().pixel()); - - XRectangle xclip = { clip.x(), clip.y(), clip.width(), clip.height() }; - XSetClipRectangles (x11Display(), gc, 0, 0, &xclip, 1, YXBanded); - - int y = 0; - QListIterator<ViewerPara> it(paragraphs_); - for (; it.current(); ++it) - { - ViewerPara *para = it.current(); - int y_end = y + para->height (); - - if (y_end > clipy && y < clipy + cliph) - para->draw (p, gc, y); - - if (para == highlight_para_) - { - QRect bounds = highlight_para_->charBounds (highlight_index_); - bounds.moveBy (0, y); - bounds = p->xForm (bounds); - - XRectangle xbounds = { bounds.x(), bounds.y(), bounds.width(), bounds.height() }; - - XFillRectangle (x11Display(), p->device()->handle(), gc, - xbounds.x, xbounds.y, xbounds.width, xbounds.height); - - XSetClipRectangles (x11Display(), gc, 0, 0, &xbounds, 1, YXBanded); - XSetForeground (x11Display(), gc, colorGroup().base().pixel()); - - para->draw (p, gc, y); - - XSetForeground (x11Display(), gc, colorGroup().text().pixel()); - XSetClipRectangles (x11Display(), gc, 0, 0, &xclip, 1, YXBanded); - } - - y = y_end; - } - - XFreeGC (x11Display(), gc); -} - -void -ViewerView::computeHeight () -{ - int width = visibleWidth(); - int height = 0; - - QListIterator<ViewerPara> it(paragraphs_); - for (; it.current(); ++it) - { - ViewerPara *para = it.current(); - para->setWidth (width); - height += para->height (); - } - - resizeContents (width, height); - repaintContents (0, 0, contentsWidth(), contentsHeight()); -} - -void -ViewerView::viewportResizeEvent (QResizeEvent *event) -{ - computeHeight (); -} - -void -ViewerView::updateHighlightChar () -{ - if (highlight_para_) - { - int y = 0; - QListIterator<ViewerPara> it(paragraphs_); - - for (; it.current(); ++it) - { - ViewerPara *para = it.current(); - if (para == highlight_para_) - { - QRect bounds = para->charBounds (highlight_index_); - bounds.moveBy (0, y); - updateContents (bounds.x(), bounds.y(), bounds.width(), bounds.height()); - - break; - } - - y += para->height (); - } - } -} - -void -ViewerView::contentsMousePressEvent (QMouseEvent *event) -{ - updateHighlightChar (); - highlight_para_ = NULL; - - int y = 0; - QListIterator<ViewerPara> it(paragraphs_); - for (; it.current(); ++it) - { - ViewerPara *para = it.current(); - int y_end = y + para->height (); - - if (y <= event->y() && event->y() < y_end) - { - int index = para->findPoint (event->x(), event->y() - y); - gunichar wc = para->getChar (index); - - if (index >= 0 && wc != (gunichar)-1) - { - highlight_para_ = para; - highlight_index_ = index; - - if (status_) - { - QString num = QString::number (wc, 16).rightJustify (4, '0'); - - status_->message (QString ("Current char: U+") + num); - } - } - - break; - } - y = y_end; - } - - if (status_ && !highlight_para_) - status_->clear (); - - updateHighlightChar(); -} - -static int -cmp_families (const void *a, const void *b) -{ - const char *a_name = pango_font_family_get_name (*(PangoFontFamily **)a); - const char *b_name = pango_font_family_get_name (*(PangoFontFamily **)b); - - return strcmp (a_name, b_name); -} - -ViewerWindow::ViewerWindow (const QString &filename) -{ - // Create menu - - file_menu_ = new QPopupMenu (this); - file_menu_->setCheckable (true); - - menuBar()->insertItem ("&File", file_menu_); - - file_menu_->insertItem( "&Quit", qApp, SLOT( closeAllWindows() ), CTRL+Key_Q ); - - right_to_left_item_ = file_menu_->insertItem( "&Right-to-Left", this, SLOT( setRightToLeft() ), 0 ); - - view_ = new ViewerView (this, new QStatusBar (this)); - - setCentralWidget (view_); - - // Create families combo box - - QToolBar *toolbar = new QToolBar ("Font", this); - - family_combo_ = new QComboBox (toolbar); - - int n_families, i; - - pango_context_list_families (view_->context(), &families_, &n_families); - qsort (families_, n_families, sizeof(PangoFontFamily *), cmp_families); - - for (i=0; i<n_families; i++) - { - const char *name = pango_font_family_get_name (families_[i]); - - family_combo_->insertItem (name); - if (!strcmp (name, "sans")) - family_combo_->setCurrentItem (i); - } - - QObject::connect (family_combo_, SIGNAL(activated(int)), this, SLOT(fillStyleCombo(int))); - - faces_ = NULL; - - style_combo_ = new QComboBox (toolbar); - fillStyleCombo (family_combo_->currentItem ()); - - size_box_ = new QSpinBox (1, 1000, 1, toolbar); - size_box_->setValue (16); - - QObject::connect (family_combo_, SIGNAL(activated(int)), this, SLOT(fontChanged())); - QObject::connect (style_combo_, SIGNAL(activated(int)), this, SLOT(fontChanged())); - QObject::connect (size_box_, SIGNAL(valueChanged(int)), this, SLOT(fontChanged())); - - fontChanged (); - - view_->readFile (filename); - - resize (500, 500); -} - -static int -compare_font_descriptions (const PangoFontDescription *a, const PangoFontDescription *b) -{ - int val = strcmp (pango_font_description_get_family (a), pango_font_description_get_family (b)); - if (val != 0) - return val; - - if (pango_font_description_get_weight (a) != pango_font_description_get_weight (b)) - return pango_font_description_get_weight (a) - pango_font_description_get_weight (b); - - if (pango_font_description_get_style (a) != pango_font_description_get_style (b)) - return pango_font_description_get_style (a) - pango_font_description_get_style (b); - - if (pango_font_description_get_stretch (a) != pango_font_description_get_stretch (b)) - return pango_font_description_get_stretch (a) - pango_font_description_get_stretch (b); - - if (pango_font_description_get_variant (a) != pango_font_description_get_variant (b)) - return pango_font_description_get_variant (a) - pango_font_description_get_variant (b); - - return 0; -} - -static int -faces_sort_func (const void *a, const void *b) -{ - PangoFontDescription *desc_a = pango_font_face_describe (*(PangoFontFace **)a); - PangoFontDescription *desc_b = pango_font_face_describe (*(PangoFontFace **)b); - - int ord = compare_font_descriptions (desc_a, desc_b); - - pango_font_description_free (desc_a); - pango_font_description_free (desc_b); - - return ord; -} - -void -ViewerWindow::fillStyleCombo (int index) -{ - PangoFontFamily *family = families_[index]; - int n_faces; - - if (faces_) - g_free (faces_); - - pango_font_family_list_faces (family, &faces_, &n_faces); - - qsort (faces_, n_faces, sizeof(PangoFontFace *), faces_sort_func); - - style_combo_->clear(); - for (int i = 0; i < n_faces; i++) - { - const char *str = pango_font_face_get_face_name (faces_[i]); - style_combo_->insertItem (str); - } -} - -void -ViewerWindow::fontChanged () -{ - PangoFontFace *face = faces_[style_combo_->currentItem()]; - - QString style = style_combo_->currentText(); - - PangoFontDescription *font_desc = pango_font_face_describe (face); - pango_font_description_set_size (font_desc, size_box_->value () * PANGO_SCALE); - - view_->setFontDesc (font_desc); - - pango_font_description_free (font_desc); -} - -void -ViewerWindow::setRightToLeft () -{ - bool new_value = !file_menu_->isItemChecked (right_to_left_item_); - - file_menu_->setItemChecked (right_to_left_item_, new_value); - view_->setDirection (new_value ? PANGO_DIRECTION_RTL : PANGO_DIRECTION_LTR); -} - -ViewerWindow::~ViewerWindow () -{ - delete view_; -} - -int -main (int argc, char **argv) -{ - QApplication a (argc, argv); - const char *filename; - - g_type_init (); - - if (QFileInfo ("./pangorc").exists ()) - putenv ("PANGO_RC_FILE=./pangorc"); - - if (argc == 2) - filename = argv[1]; - else - filename = "HELLO.utf8"; - - ViewerWindow *vw = new ViewerWindow (QString::fromLocal8Bit (filename)); - - vw->show(); - - a.connect (&a, SIGNAL(lastWindowClosed()), &a, SLOT(quit())); - return a.exec (); -} - |