IscanderCheJune 29, 2019, 12:09 p.m.
Как отобразить QPainter в кастомном виджете с фиксированными размерами
Разрабатываю виджет для просмотра изображений в миниатюре.
Что получилось: показать изображение в рамке (см. прицеп). Но беда в том, что при ресайзе основного виджета виджеты с картинками тоже ресайзятся (опять же см. прицеп), чего делать уже не надо. Как решить эту задачу, помогите, плиз.
// widget.h #ifndef WIDGET_H #define WIDGET_H #include <QWidget> class Widget : public QWidget { Q_OBJECT public: Widget(QWidget *parent = 0); ~Widget(); }; #endif // WIDGET_H // widget.cpp #include "widget.h" #include "paintwidget.h" #include <QVBoxLayout> #include <QHBoxLayout> Widget::Widget(QWidget *parent) : QWidget(parent) { PaintWidget* paintWidget1 = new PaintWidget(parent); PaintWidget* paintWidget2 = new PaintWidget(parent); QVBoxLayout* layoutV = new QVBoxLayout; layoutV->addWidget(paintWidget1); layoutV->addWidget(paintWidget2); setLayout(layoutV); } Widget::~Widget() { } // paintwidget.h #ifndef PAINTWIDGET_H #define PAINTWIDGET_H #include <QWidget> class PaintWidget : public QWidget { Q_OBJECT public: explicit PaintWidget(QWidget *parent = 0); protected: void paintEvent(QPaintEvent*); private: int rectPhotoX; int rectPhotoY; int rectPhotoWidth; int rectPhotoHeight; }; #endif // PAINTWIDGET_H // paintwidget.cpp #include "paintwidget.h" #include <QPainter> PaintWidget::PaintWidget(QWidget *parent) : QWidget(parent) { } void PaintWidget::paintEvent(QPaintEvent*) { QPainter painter(this); rectPhotoX = 0; rectPhotoY = 0; rectPhotoWidth = 110; rectPhotoHeight = 110; int rectPhotoRadius = 5; QRect rect(rectPhotoX, rectPhotoY, rectPhotoWidth, rectPhotoHeight); painter.setClipRect(rect); QBrush brush(Qt::white, Qt::SolidPattern); painter.fillRect(rect, brush); QImage img(":/images/DSC_0024.jpg"); painter.setRenderHint(QPainter::Antialiasing, true); painter.setBrush(QBrush(Qt::white)); painter.setPen(QPen(Qt::black, 1, Qt::DotLine)); QRect rectPhoto(rectPhotoX, rectPhotoY, rectPhotoWidth, rectPhotoHeight); painter.drawRoundedRect(rectPhoto, rectPhotoRadius, rectPhotoRadius); int minimumOffset = 10; int maximumWidthPhotoView = rectPhotoWidth - minimumOffset * 2; int maximumHeightPhotoView = rectPhotoHeight - minimumOffset * 2; int coefficientWidth = img.width() / maximumWidthPhotoView; int coefficientHeight = img.height() / maximumHeightPhotoView; int coefficient = 0; if(coefficientWidth > coefficientHeight) coefficient = coefficientWidth; else coefficient = coefficientHeight; int realWidthPhotoView = img.width() / coefficient; int realHeightPhotoView = img.height() / coefficient; int offsetX = (rectPhotoWidth - realWidthPhotoView) / 2; int offsetY = (rectPhotoHeight - realHeightPhotoView) / 2; int photoViewX = rectPhotoX + offsetX; int photoViewY = rectPhotoY + offsetY; QImage img2 = img.scaled(realWidthPhotoView, realHeightPhotoView); painter.drawImage(photoViewX, photoViewY, img2); }
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