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382 lines
12 KiB
382 lines
12 KiB
#include "uilineedit.h"
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#include <graphics/font.h>
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#include <graphics/graphics.h>
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#include <core/platform.h>
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#include <otml/otmlnode.h>
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UILineEdit::UILineEdit() : UIWidget(UITypeLabel)
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{
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m_align = AlignLeftCenter;
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m_cursorPos = 0;
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m_startRenderPos = 0;
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m_textHorizontalMargin = 3;
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m_focusable = true;
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blinkCursor();
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}
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UILineEditPtr UILineEdit::create()
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{
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UILineEditPtr lineEdit(new UILineEdit);
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lineEdit->setStyle("LineEdit");
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return lineEdit;
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}
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void UILineEdit::loadStyleFromOTML(const OTMLNodePtr& styleNode)
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{
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UIWidget::loadStyleFromOTML(styleNode);
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setText(styleNode->readAt("text", getText()));
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}
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void UILineEdit::render()
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{
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UIWidget::render();
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//TODO: text rendering could be much optimized by using vertex buffer or caching the render into a texture
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int textLength = m_text.length();
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const TexturePtr& texture = m_font->getTexture();
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for(int i=0;i<textLength;++i) {
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g_graphics.drawTexturedRect(m_glyphsCoords[i], texture, m_glyphsTexCoords[i]);
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}
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// render cursor
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if(isExplicitlyEnabled() && hasFocus() && m_cursorPos >= 0) {
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assert(m_cursorPos <= textLength);
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// draw every 330ms
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const int delay = 330;
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int ticks = g_platform.getTicks();
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if(ticks - m_cursorTicks <= delay) {
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Rect cursorRect;
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// when cursor is at 0 or is the first visible element
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if(m_cursorPos == 0 || m_cursorPos == m_startRenderPos)
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cursorRect = Rect(m_drawArea.left()-1, m_drawArea.top(), 1, m_font->getGlyphHeight());
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else
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cursorRect = Rect(m_glyphsCoords[m_cursorPos-1].right(), m_glyphsCoords[m_cursorPos-1].top(), 1, m_font->getGlyphHeight());
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g_graphics.drawFilledRect(cursorRect, m_color);
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} else if(ticks - m_cursorTicks >= 2*delay) {
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m_cursorTicks = ticks;
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}
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}
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}
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void UILineEdit::update()
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{
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int textLength = m_text.length();
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// prevent glitches
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if(!m_rect.isValid())
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return;
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// map glyphs positions
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Size textBoxSize;
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const std::vector<Point>& glyphsPositions = m_font->calculateGlyphsPositions(m_text, m_align, &textBoxSize);
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const Rect *glyphsTextureCoords = m_font->getGlyphsTextureCoords();
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const Size *glyphsSize = m_font->getGlyphsSize();
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int glyph;
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// resize just on demand
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if(textLength > (int)m_glyphsCoords.size()) {
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m_glyphsCoords.resize(textLength);
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m_glyphsTexCoords.resize(textLength);
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}
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// readjust start view area based on cursor position
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if(m_cursorPos >= 0 && textLength > 0) {
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assert(m_cursorPos <= textLength);
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if(m_cursorPos < m_startRenderPos) // cursor is before the previuos first rendered glyph, so we need to update
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{
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m_startInternalPos.x = glyphsPositions[m_cursorPos].x;
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m_startInternalPos.y = glyphsPositions[m_cursorPos].y - m_font->getTopMargin();
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m_startRenderPos = m_cursorPos;
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} else if(m_cursorPos > m_startRenderPos || // cursor is after the previuos first rendered glyph
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(m_cursorPos == m_startRenderPos && textLength == m_cursorPos)) // cursor is at the previuos rendered element, and is the last text element
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{
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Rect virtualRect(m_startInternalPos, m_rect.size() - Size(2*m_textHorizontalMargin, 0) ); // previous rendered virtual rect
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int pos = m_cursorPos - 1; // element before cursor
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glyph = (uchar)m_text[pos]; // glyph of the element before cursor
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Rect glyphRect(glyphsPositions[pos], glyphsSize[glyph]);
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// if the cursor is not on the previous rendered virtual rect we need to update it
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if(!virtualRect.contains(glyphRect.topLeft()) || !virtualRect.contains(glyphRect.bottomRight())) {
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// calculate where is the first glyph visible
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Point startGlyphPos;
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startGlyphPos.y = std::max(glyphRect.bottom() - virtualRect.height(), 0);
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startGlyphPos.x = std::max(glyphRect.right() - virtualRect.width(), 0);
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// find that glyph
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for(pos = 0; pos < textLength; ++pos) {
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glyph = (uchar)m_text[pos];
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glyphRect = Rect(glyphsPositions[pos], glyphsSize[glyph]);
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glyphRect.setTop(std::max(glyphRect.top() - m_font->getTopMargin() - m_font->getGlyphSpacing().height(), 0));
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glyphRect.setLeft(std::max(glyphRect.left() - m_font->getGlyphSpacing().width(), 0));
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// first glyph entirely visible found
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if(glyphRect.topLeft() >= startGlyphPos) {
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m_startInternalPos.x = glyphsPositions[pos].x;
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m_startInternalPos.y = glyphsPositions[pos].y - m_font->getTopMargin();
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m_startRenderPos = pos;
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break;
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}
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}
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}
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}
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} else {
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m_startInternalPos = Point(0,0);
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}
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Rect textScreenCoords = m_rect;
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textScreenCoords.addLeft(-m_textHorizontalMargin);
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textScreenCoords.addRight(-m_textHorizontalMargin);
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m_drawArea = textScreenCoords;
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if(m_align & AlignBottom) {
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m_drawArea.translate(0, textScreenCoords.height() - textBoxSize.height());
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} else if(m_align & AlignVerticalCenter) {
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m_drawArea.translate(0, (textScreenCoords.height() - textBoxSize.height()) / 2);
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} else { // AlignTop
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}
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if(m_align & AlignRight) {
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m_drawArea.translate(textScreenCoords.width() - textBoxSize.width(), 0);
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} else if(m_align & AlignHorizontalCenter) {
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m_drawArea.translate((textScreenCoords.width() - textBoxSize.width()) / 2, 0);
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} else { // AlignLeft
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}
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for(int i = 0; i < textLength; ++i) {
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glyph = (uchar)m_text[i];
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m_glyphsCoords[i].clear();
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// skip invalid glyphs
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if(glyph < 32)
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continue;
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// calculate initial glyph rect and texture coords
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Rect glyphScreenCoords(glyphsPositions[i], glyphsSize[glyph]);
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Rect glyphTextureCoords = glyphsTextureCoords[glyph];
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// first translate to align position
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if(m_align & AlignBottom) {
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glyphScreenCoords.translate(0, textScreenCoords.height() - textBoxSize.height());
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} else if(m_align & AlignVerticalCenter) {
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glyphScreenCoords.translate(0, (textScreenCoords.height() - textBoxSize.height()) / 2);
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} else { // AlignTop
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// nothing to do
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}
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if(m_align & AlignRight) {
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glyphScreenCoords.translate(textScreenCoords.width() - textBoxSize.width(), 0);
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} else if(m_align & AlignHorizontalCenter) {
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glyphScreenCoords.translate((textScreenCoords.width() - textBoxSize.width()) / 2, 0);
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} else { // AlignLeft
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// nothing to do
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}
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// only render glyphs that are after startRenderPosition
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if(glyphScreenCoords.bottom() < m_startInternalPos.y || glyphScreenCoords.right() < m_startInternalPos.x)
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continue;
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// bound glyph topLeft to startRenderPosition
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if(glyphScreenCoords.top() < m_startInternalPos.y) {
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glyphTextureCoords.setTop(glyphTextureCoords.top() + (m_startInternalPos.y - glyphScreenCoords.top()));
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glyphScreenCoords.setTop(m_startInternalPos.y);
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}
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if(glyphScreenCoords.left() < m_startInternalPos.x) {
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glyphTextureCoords.setLeft(glyphTextureCoords.left() + (m_startInternalPos.x - glyphScreenCoords.left()));
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glyphScreenCoords.setLeft(m_startInternalPos.x);
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}
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// subtract startInternalPos
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glyphScreenCoords.translate(-m_startInternalPos);
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// translate rect to screen coords
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glyphScreenCoords.translate(textScreenCoords.topLeft());
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// only render if glyph rect is visible on screenCoords
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if(!textScreenCoords.intersects(glyphScreenCoords))
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continue;
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// bound glyph bottomRight to screenCoords bottomRight
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if(glyphScreenCoords.bottom() > textScreenCoords.bottom()) {
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glyphTextureCoords.setBottom(glyphTextureCoords.bottom() + (textScreenCoords.bottom() - glyphScreenCoords.bottom()));
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glyphScreenCoords.setBottom(textScreenCoords.bottom());
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}
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if(glyphScreenCoords.right() > textScreenCoords.right()) {
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glyphTextureCoords.setRight(glyphTextureCoords.right() + (textScreenCoords.right() - glyphScreenCoords.right()));
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glyphScreenCoords.setRight(textScreenCoords.right());
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}
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// render glyph
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m_glyphsCoords[i] = glyphScreenCoords;
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m_glyphsTexCoords[i] = glyphTextureCoords;
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}
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}
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void UILineEdit::setFont(const FontPtr& font)
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{
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if(m_font != font) {
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m_font = font;
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update();
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}
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}
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void UILineEdit::setText(const std::string& text)
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{
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if(m_text != text) {
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m_text = text;
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if(m_cursorPos >= 0) {
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m_cursorPos = 0;
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blinkCursor();
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}
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update();
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}
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}
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void UILineEdit::setAlign(AlignmentFlag align)
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{
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if(m_align != align) {
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m_align = align;
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update();
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}
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}
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void UILineEdit::setCursorPos(int pos)
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{
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if(pos != m_cursorPos) {
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if(pos < 0)
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m_cursorPos = 0;
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else if((uint)pos >= m_text.length())
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m_cursorPos = m_text.length();
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else
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m_cursorPos = pos;
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update();
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}
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}
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void UILineEdit::enableCursor(bool enable)
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{
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if(enable) {
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m_cursorPos = 0;
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blinkCursor();
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} else
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m_cursorPos = -1;
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update();
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}
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void UILineEdit::appendCharacter(char c)
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{
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if(m_cursorPos >= 0) {
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std::string tmp;
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tmp = c;
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m_text.insert(m_cursorPos, tmp);
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m_cursorPos++;
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blinkCursor();
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update();
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}
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}
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void UILineEdit::removeCharacter(bool right)
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{
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if(m_cursorPos >= 0 && m_text.length() > 0) {
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if(right && (uint)m_cursorPos < m_text.length())
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m_text.erase(m_text.begin() + m_cursorPos);
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else if((uint)m_cursorPos == m_text.length()) {
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m_text.erase(m_text.begin() + (--m_cursorPos));
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blinkCursor();
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}
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update();
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}
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}
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void UILineEdit::moveCursor(bool right)
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{
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if(right) {
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if((uint)m_cursorPos+1 <= m_text.length()) {
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m_cursorPos++;
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blinkCursor();
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}
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} else {
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if(m_cursorPos-1 >= 0) {
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m_cursorPos--;
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blinkCursor();
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}
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}
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update();
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}
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int UILineEdit::getTextPos(Point pos)
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{
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int textLength = m_text.length();
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// find any glyph that is actually on the
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int candidatePos = -1;
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for(int i=0;i<textLength;++i) {
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Rect clickGlyphRect = m_glyphsCoords[i];
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clickGlyphRect.addTop(m_font->getTopMargin() + m_font->getGlyphSpacing().height());
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clickGlyphRect.addLeft(m_font->getGlyphSpacing().width()+1);
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if(clickGlyphRect.contains(pos))
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return i;
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else if(pos.y >= clickGlyphRect.top() && pos.y <= clickGlyphRect.bottom()) {
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if(pos.x <= clickGlyphRect.left())
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candidatePos = i;
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else if(pos.x >= clickGlyphRect.right())
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candidatePos = i+1;
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}
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}
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return candidatePos;
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}
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void UILineEdit::onGeometryUpdate(UIGeometryUpdateEvent& event)
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{
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update();
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}
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void UILineEdit::onFocusChange(UIFocusEvent& event)
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{
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if(event.gotFocus()) {
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if(event.reason() == TabFocusReason)
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setCursorPos(0);
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else
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blinkCursor();
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}
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}
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void UILineEdit::onKeyPress(UIKeyEvent& event)
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{
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if(event.keyCode() == KC_DELETE) // erase right character
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removeCharacter(true);
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else if(event.keyCode() == KC_BACK) // erase left character
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removeCharacter(false);
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else if(event.keyCode() == KC_RIGHT) // move cursor right
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moveCursor(true);
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else if(event.keyCode() == KC_LEFT) // move cursor left
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moveCursor(false);
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else if(event.keyCode() == KC_HOME) // move cursor to first character
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setCursorPos(0);
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else if(event.keyCode() == KC_END) // move cursor to last character
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setCursorPos(m_text.length());
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else if(event.keyChar() != 0) {
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if(event.keyCode() != KC_TAB && event.keyCode() != KC_RETURN)
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appendCharacter(event.keyChar());
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else
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event.ignore();
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} else
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event.ignore();
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}
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void UILineEdit::onMousePress(UIMouseEvent& event)
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{
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if(event.button() == MouseLeftButton) {
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int pos = getTextPos(event.pos());
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if(pos >= 0)
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setCursorPos(pos);
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}
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}
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void UILineEdit::blinkCursor()
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{
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m_cursorTicks = g_platform.getTicks();
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}
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