text box for input
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287
src/FbTk/TextBox.cc
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287
src/FbTk/TextBox.cc
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// TextBox.cc for FbTk - fluxbox toolkit
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// Copyright (c) 2003 Henrik Kinnunen (fluxgen at users.sourceforge.net)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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// $Id: TextBox.cc,v 1.1 2003/08/26 23:24:48 fluxgen Exp $
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#include "TextBox.hh"
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#include "Font.hh"
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#include "EventManager.hh"
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#include "App.hh"
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#include <cctype>
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#include <X11/keysym.h>
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#include <X11/Xutil.h>
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namespace FbTk {
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TextBox::TextBox(int screen_num,
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const Font &font, const std::string &text):
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FbWindow(screen_num, 0, 0, 1, 1, ExposureMask | KeyPressMask | ButtonPressMask),
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m_font(&font),
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m_text(text),
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m_gc(0),
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m_cursor_pos(0),
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m_start_pos(0),
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m_end_pos(0) {
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FbTk::EventManager::instance()->add(*this, *this);
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}
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TextBox::TextBox(const FbWindow &parent,
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const Font &font, const std::string &text):
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FbWindow(parent, 0, 0, 1, 1, ExposureMask | KeyPressMask | ButtonPressMask),
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m_font(&font),
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m_text(text),
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m_gc(0),
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m_cursor_pos(0),
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m_start_pos(0),
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m_end_pos(0) {
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FbTk::EventManager::instance()->add(*this, *this);
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}
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TextBox::~TextBox() {
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}
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void TextBox::setText(const std::string &text) {
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m_text = text;
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cursorEnd();
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adjustStartPos();
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}
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void TextBox::setFont(const Font &font) {
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m_font = &font;
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}
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void TextBox::setGC(GC gc) {
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m_gc = gc;
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}
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void TextBox::setInputFocus() {
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XSetInputFocus(FbTk::App::instance()->display(),
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window(),
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RevertToParent,
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CurrentTime);
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}
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void TextBox::cursorHome() {
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m_start_pos = m_cursor_pos = 0;
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}
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void TextBox::cursorEnd() {
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m_cursor_pos = m_end_pos = text().size();
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}
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void TextBox::cursorForward() {
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if (m_start_pos + cursorPosition() < m_end_pos)
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m_cursor_pos++;
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else if (m_end_pos < text().size()) {
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m_cursor_pos++;
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m_end_pos++;
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adjustStartPos();
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}
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}
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void TextBox::cursorBackward() {
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if (cursorPosition())
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m_cursor_pos--;
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else if (m_start_pos) {
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m_start_pos--;
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adjustEndPos();
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}
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}
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void TextBox::backspace() {
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if (m_start_pos || cursorPosition()) {
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m_text.erase(m_start_pos + cursorPosition() - 1, 1);
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if (cursorPosition())
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setCursorPosition(cursorPosition() - 1);
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else
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m_start_pos--;
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adjustEndPos();
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}
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}
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void TextBox::deleteForward() {
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if (m_start_pos + m_cursor_pos < m_end_pos) {
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m_text.erase(m_start_pos + m_cursor_pos, 1);
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adjustEndPos();
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}
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}
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void TextBox::insertText(const std::string &val) {
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m_text.insert(m_start_pos + cursorPosition(), val);
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m_cursor_pos += val.size();
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m_end_pos += val.size();
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if (m_start_pos + cursorPosition() < m_end_pos)
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adjustEndPos();
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else
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adjustStartPos();
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}
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void TextBox::killToEnd() {
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if (cursorPosition() < text().size()) {
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m_text.erase(cursorPosition());
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setText(m_text);
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}
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}
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void TextBox::clear() {
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FbWindow::clear();
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// center text by default
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int center_pos = (height() + font().ascent())/2;
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if (gc() == 0)
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setGC(DefaultGC(FbTk::App::instance()->display(), screenNumber()));
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font().drawText(window(), screenNumber(),
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gc(),
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text().c_str() + m_start_pos,
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m_end_pos - m_start_pos,
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0, center_pos); // pos
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// draw cursor position
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int cursor_pos = font().textWidth(text().c_str() + m_start_pos, m_cursor_pos) + 1;
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drawLine(gc(), cursor_pos, 0, cursor_pos, font().height());
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}
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void TextBox::moveResize(int x, int y,
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unsigned int width, unsigned int height) {
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FbWindow::moveResize(x, y, width, height);
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clear();
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}
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void TextBox::resize(unsigned int width, unsigned int height) {
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FbWindow::resize(width, height);
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clear();
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}
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void TextBox::exposeEvent(XExposeEvent &event) {
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clear();
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}
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void TextBox::buttonPressEvent(XButtonEvent &event) {
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setInputFocus();
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}
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void TextBox::keyPressEvent(XKeyEvent &event) {
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KeySym ks;
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char keychar[1];
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XLookupString(&event, keychar, 1, &ks, 0);
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// a modifier key by itself doesn't do anything
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if (IsModifierKey(ks)) return;
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if (event.state) { // handle keybindings without state
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if (event.state == ControlMask) {
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switch (ks) {
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case XK_b:
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cursorBackward();
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break;
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case XK_f:
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cursorForward();
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break;
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case XK_a:
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cursorHome();
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break;
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case XK_e:
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cursorEnd();
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break;
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case XK_d:
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deleteForward();
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break;
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case XK_k:
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killToEnd();
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break;
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}
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} else if (event.state == ShiftMask) {
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if (isprint(keychar[0])) {
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std::string val;
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val += keychar[0];
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insertText(val);
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}
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}
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} else { // no state
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switch (ks) {
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case XK_BackSpace:
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backspace();
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break;
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case XK_Home:
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cursorHome();
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break;
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case XK_End:
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cursorEnd();
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break;
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case XK_Left:
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cursorBackward();
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break;
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case XK_Right:
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cursorForward();
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break;
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default:
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if (isprint(keychar[0])) {
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std::string val;
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val += keychar[0];
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insertText(val);
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}
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}
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}
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clear();
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}
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void TextBox::setCursorPosition(int pos) {
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m_cursor_pos = pos;
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if (m_cursor_pos > text().size())
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cursorEnd();
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else if (m_cursor_pos < 0)
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cursorHome();
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}
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void TextBox::adjustEndPos() {
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m_end_pos = text().size();
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int text_width = font().textWidth(text().c_str() + m_start_pos, m_end_pos - m_start_pos);
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while (text_width > width()) {
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m_end_pos--;
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text_width = font().textWidth(text().c_str() + m_start_pos, m_end_pos - m_start_pos);
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}
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}
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void TextBox::adjustStartPos() {
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int text_width = font().textWidth(text().c_str() + m_start_pos, m_end_pos - m_start_pos);
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if (text_width < width())
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return;
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int start_pos = 0;
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text_width = font().textWidth(text().c_str() + start_pos, m_end_pos - start_pos);
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while (text_width > width()) {
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start_pos++;
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text_width = font().textWidth(text().c_str() + start_pos, m_end_pos - start_pos);
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}
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// adjust cursorPosition() according relative to change to m_start_pos
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m_cursor_pos -= start_pos - m_start_pos;
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m_start_pos = start_pos;
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}
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}; // end namespace FbTk
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84
src/FbTk/TextBox.hh
Normal file
84
src/FbTk/TextBox.hh
Normal file
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@ -0,0 +1,84 @@
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// TextBox.hh for FbTk - fluxbox toolkit
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// Copyright (c) 2003 Henrik Kinnunen (fluxgen at users.sourceforge.net)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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// $Id: TextBox.hh,v 1.1 2003/08/26 23:24:48 fluxgen Exp $
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#ifndef FBTK_TEXTBOX_HH
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#define FBTK_TEXTBOX_HH
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#include "FbWindow.hh"
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#include "Color.hh"
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#include "Text.hh"
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#include "EventHandler.hh"
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#include <string>
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namespace FbTk {
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class Font;
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class TextBox:public FbWindow, public EventHandler {
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public:
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TextBox(int screen_num, const Font &font, const std::string &text);
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TextBox(const FbWindow &parent, const Font &font, const std::string &text);
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virtual ~TextBox();
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void setText(const std::string &text);
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void setFont(const Font &font);
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void setGC(GC gc);
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void setCursorPosition(int cursor);
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void setInputFocus();
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void cursorEnd();
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void cursorHome();
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void cursorForward();
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void cursorBackward();
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void deleteForward();
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void insertText(const std::string &val);
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void backspace();
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void killToEnd();
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void moveResize(int x, int y,
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unsigned int width, unsigned int height);
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void resize(unsigned int width, unsigned int height);
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void clear();
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void exposeEvent(XExposeEvent &event);
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void buttonPressEvent(XButtonEvent &event);
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void keyPressEvent(XKeyEvent &event);
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const std::string &text() const { return m_text; }
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const Font &font() const { return *m_font; }
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GC gc() const { return m_gc; }
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int cursorPosition() const { return m_cursor_pos; }
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private:
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void adjustEndPos();
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void adjustStartPos();
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const FbTk::Font *m_font;
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std::string m_text;
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GC m_gc;
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std::string::size_type m_cursor_pos, m_start_pos, m_end_pos;
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};
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} // end namespace FbTk
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#endif // FBTK_TEXTBOX_HH
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