133 lines
4.2 KiB
C++
133 lines
4.2 KiB
C++
#include "richtexteffect.h"
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#include <QTextDocument>
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#include "timeline/clip.h"
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enum AutoscrollDirection {
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SCROLL_OFF,
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SCROLL_UP,
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SCROLL_DOWN,
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SCROLL_LEFT,
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SCROLL_RIGHT,
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};
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RichTextEffect::RichTextEffect(Clip *c, const EffectMeta *em) :
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Effect(c, em)
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{
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SetFlags(Effect::SuperimposeFlag);
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EffectRow* text_row = new EffectRow(this, tr("Text"));
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text_val = new StringField(text_row, "text");
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text_val->SetColumnSpan(2);
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EffectRow* padding_row = new EffectRow(this, tr("Padding"));
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padding_field = new DoubleField(padding_row, "padding");
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padding_field->SetColumnSpan(2);
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EffectRow* position_row = new EffectRow(this, tr("Position"));
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position_x = new DoubleField(position_row, "posx");
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position_y = new DoubleField(position_row, "posy");
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EffectRow* vertical_align_row = new EffectRow(this, tr("Vertical Align:"));
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vertical_align = new ComboField(vertical_align_row, "valign");
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vertical_align->AddItem(tr("Top"), Qt::AlignTop);
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vertical_align->AddItem(tr("Center"), Qt::AlignCenter);
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vertical_align->AddItem(tr("Bottom"), Qt::AlignBottom);
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vertical_align->SetValueAt(0, Qt::AlignCenter);
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vertical_align->SetColumnSpan(2);
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EffectRow* autoscroll_row = new EffectRow(this, tr("Auto-Scroll"));
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autoscroll = new ComboField(autoscroll_row, "autoscroll");
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autoscroll->AddItem(tr("Off"), SCROLL_OFF);
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autoscroll->AddItem(tr("Up"), SCROLL_UP);
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autoscroll->AddItem(tr("Down"), SCROLL_DOWN);
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autoscroll->AddItem(tr("Left"), SCROLL_LEFT);
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autoscroll->AddItem(tr("Right"), SCROLL_RIGHT);
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autoscroll->SetColumnSpan(2);
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// Create default text
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text_val->SetValueAt(0, "<html>"
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"<body style=\"color: #ffffff; font-size: 36pt;\">"
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"<center>Sample Text</center>"
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"</body>"
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"</html>");
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}
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void RichTextEffect::redraw(double timecode)
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{
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QPainter p(&img);
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p.setRenderHint(QPainter::Antialiasing);
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int width = img.width();
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int height = img.height();
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img.fill(Qt::transparent);
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int padding = qRound(padding_field->GetDoubleAt(timecode));
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width -= 2 * padding;
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height -= 2 * padding;
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QTextDocument td;
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td.setHtml(text_val->GetStringAt(timecode));
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td.setTextWidth(width);
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int translate_x = qRound(position_x->GetDoubleAt(timecode) + padding);
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int translate_y = qRound(position_y->GetDoubleAt(timecode) + padding);
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int doc_height = qRound(td.size().height());
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AutoscrollDirection auto_scroll_dir = static_cast<AutoscrollDirection>(autoscroll->GetValueAt(timecode).toInt());
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double scroll_progress;
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if (auto_scroll_dir != SCROLL_OFF) {
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double clip_length_secs = double(parent_clip->length()) / parent_clip->media_frame_rate();
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scroll_progress = (timecode - double(parent_clip->clip_in()) / parent_clip->media_frame_rate()) / clip_length_secs;
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}
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if (auto_scroll_dir == SCROLL_OFF || auto_scroll_dir == SCROLL_LEFT || auto_scroll_dir == SCROLL_RIGHT) {
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// If we're not auto-scrolling the vertical direction, respect the vertical alignment
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if (vertical_align->GetValueAt(timecode).toInt() == Qt::AlignCenter) {
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translate_y += height / 2 - doc_height / 2;
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} else if (vertical_align->GetValueAt(timecode).toInt() == Qt::AlignBottom) {
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translate_y += height - doc_height;
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}
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// Check if we are autoscrolling
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if (auto_scroll_dir != SCROLL_OFF) {
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if (auto_scroll_dir == SCROLL_LEFT) {
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scroll_progress = 1.0 - scroll_progress;
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}
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int doc_width = td.size().width();
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translate_x += qRound(-doc_width + (img.width() + doc_width) * scroll_progress);
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}
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} else if (auto_scroll_dir == SCROLL_UP || auto_scroll_dir == SCROLL_DOWN) {
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// Auto-scroll bottom to top or top to bottom
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if (auto_scroll_dir == SCROLL_UP) {
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scroll_progress = 1.0 - scroll_progress;
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}
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translate_y += qRound(-doc_height + (height + doc_height)*scroll_progress);
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}
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QRect clip_rect = img.rect();
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clip_rect.translate(-translate_x, -translate_y);
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p.translate(translate_x, translate_y);
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td.drawContents(&p, clip_rect);
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}
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bool RichTextEffect::AlwaysUpdate()
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{
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return autoscroll->GetValueAt(autoscroll->Now()).toInt() != SCROLL_OFF;
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}
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