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added viewer zoom functionality

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This commit is contained in:
itsmattkc
2018-12-18 11:18:55 +11:00
parent d3c8e7379b
commit 0427463742
6 changed files with 84 additions and 45 deletions
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ui/viewercontainer.cpp
+43 -12
View File
@@ -2,43 +2,74 @@
#include <QWidget>
#include <QResizeEvent>
#include <QScrollBar>
#include <QVBoxLayout>
#include "viewerwidget.h"
#include "panels/viewer.h"
#include "project/sequence.h"
#include "debug.h"
// enforces aspect ratio
ViewerContainer::ViewerContainer(QWidget *parent) :
QWidget(parent),
aspect_ratio(1),
QScrollArea(parent),
fit(true),
child(NULL)
{}
{
setFrameShadow(QFrame::Plain);
setFrameShape(QFrame::NoFrame);
area = new QWidget(this);
area->move(0, 0);
setWidget(area);
child = new ViewerWidget(area);
}
ViewerContainer::~ViewerContainer() {
delete area;
}
void ViewerContainer::adjust() {
if (child != NULL) {
if (viewer->seq != NULL) {
if (child->waveform) {
child->move(0, 0);
child->resize(size());
} else {
QSize widget_size = size();
} else if (fit) {
double aspect_ratio = double(viewer->seq->width)/double(viewer->seq->height);
int widget_x = 0;
int widget_y = 0;
int widget_width = widget_size.width();
int widget_height = widget_size.height();
int widget_width = width();
int widget_height = height();
float widget_ar = (float) widget_width /(float) widget_height;
bool widget_is_larger_than_sequence = widget_ar > aspect_ratio;
bool widget_is_wider_than_sequence = widget_ar > aspect_ratio;
if (widget_is_larger_than_sequence) {
if (widget_is_wider_than_sequence) {
widget_width = widget_height * aspect_ratio;
widget_x = (widget_size.width() / 2) - (widget_width / 2);
widget_x = (width() / 2) - (widget_width / 2);
} else {
widget_height = widget_width / aspect_ratio;
widget_y = (widget_size.height() / 2) - (widget_height / 2);
widget_y = (height() / 2) - (widget_height / 2);
}
child->move(widget_x, widget_y);
child->resize(widget_width, widget_height);
} else {
int zoomed_width = double(viewer->seq->width)*zoom;
int zoomed_height = double(viewer->seq->height)*zoom;
int zoomed_x = 0;
int zoomed_y = 0;
if (zoomed_width < width()) zoomed_x = (width()>>1)-(zoomed_width>>1);
if (zoomed_height < height()) zoomed_y = (height()>>1)-(zoomed_height>>1);
child->move(zoomed_x, zoomed_y);
child->resize(zoomed_width, zoomed_height);
}
}
area->resize(qMax(width(), child->width()), qMax(height(), child->height()));
}
void ViewerContainer::resizeEvent(QResizeEvent *event) {