Thomas Wilshaw
7617ddabe3
The translation needs to be scaled relative to the zoom percentage so we get sensible movement when dragging. Dragging is also disabled when the image is smaller than the container widget. Re-orders the initialisation of some variables to stop a compile warning on Travis.
110 lines
2.7 KiB
C++
110 lines
2.7 KiB
C++
/***
|
|
|
|
Olive - Non-Linear Video Editor
|
|
Copyright (C) 2019 Olive Team
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
***/
|
|
|
|
#ifndef VIEWERSIZER_H
|
|
#define VIEWERSIZER_H
|
|
|
|
#include <QWidget>
|
|
|
|
#include "common/define.h"
|
|
|
|
OLIVE_NAMESPACE_ENTER
|
|
|
|
/**
|
|
* @brief A container widget that enforces the aspect ratio of a child widget
|
|
*
|
|
* Using a provided width and height, this widget calculates the aspect ratio and forces the child widget to stay
|
|
* confined to that aspect ratio and centered within the widget.
|
|
*
|
|
* The aspect ratio is calculated width divided by height. If the aspect ratio is zero (either width or height == 0),
|
|
* the widget is hidden until a valid size is provided.
|
|
*/
|
|
class ViewerSizer : public QWidget
|
|
{
|
|
Q_OBJECT
|
|
public:
|
|
ViewerSizer(QWidget* parent = nullptr);
|
|
|
|
/**
|
|
* @brief Set the widget to be adjusted by this widget
|
|
*
|
|
* ViewerSizer takes ownership of this widget. If a widget was previously set, it is destroyed.
|
|
*/
|
|
void SetWidget(QWidget* widget);
|
|
|
|
/**
|
|
* @brief Set resolution to use
|
|
*
|
|
* This is not the actual resolution of the viewer, it's used to calculate the aspect ratio
|
|
*/
|
|
void SetChildSize(int width, int height);
|
|
|
|
/**
|
|
* @brief Set the zoom value of the child widget
|
|
*
|
|
* The number is an integer percentage (100 = 100%). Set to 0 to auto-fit.
|
|
*/
|
|
void SetZoom(int percent);
|
|
|
|
signals:
|
|
void RequestMatrix(const QMatrix4x4& matrix);
|
|
void SendZoomData(bool flag, int percent);
|
|
|
|
protected:
|
|
/**
|
|
* @brief Listen for resize events to ensure the child widget remains correctly sized
|
|
*/
|
|
virtual void resizeEvent(QResizeEvent *event) override;
|
|
|
|
private:
|
|
/**
|
|
* @brief Main sizing function, resizes widget_ to fit aspect_ratio_ (or hides if aspect ratio is 0)
|
|
*/
|
|
void UpdateSize();
|
|
|
|
/**
|
|
* @brief Reference to widget
|
|
*
|
|
* If this is nullptr, all sizing operations are no-ops
|
|
*/
|
|
QWidget* widget_;
|
|
|
|
/**
|
|
* @brief Internal resolution values
|
|
*/
|
|
int width_;
|
|
int height_;
|
|
|
|
/**
|
|
* @brief Aspect ratio calculated from the size provided by SetChildSize()
|
|
*/
|
|
double aspect_ratio_;
|
|
|
|
/**
|
|
* @brief Internal zoom value
|
|
*/
|
|
int zoom_;
|
|
|
|
};
|
|
|
|
OLIVE_NAMESPACE_EXIT
|
|
|
|
#endif // VIEWERSIZER_H
|