一、前言
在平時的寫作過程中,經常需要将一些操作動作和效果圖截圖成gif格式,使得涵蓋的資訊更全面更生動,有時候可以将整個操作過程和運作效果錄制成MP4,但是檔案體積比較大,而且很多網站不便于上傳,基本上都支援gif動圖,一般一個5秒左右的gif,800*600分辨率,可以很好的控制在500KB内,這樣就比較完美的支援各大網站上傳動圖。
最開始使用的是ScreenGif.exe,用了很久,感覺還可以,後面一個朋友推薦用LICEcap.exe,體積更小,壓縮比更高,再到後來發現有個gif.h開源的類,調用其中的方法可以實作将多張圖檔合并到一張gif中去,而且還是跨平台的,本人親自在WIN+UBUNTU測試成功。
最初的代碼是倪大俠給的,我在此基礎上重新完善了下,使得可以直接拖動窗體大小來改變錄屏區域的大小。增加了對Qt4和其他編譯器的支援。
二、實作的功能
- 1:可設定要錄制螢幕的寬高,支援右下角直接拉動改變.
- 2:可設定變寬的寬度
- 3:可設定錄屏控件的背景顔色
- 4:可設定錄制的幀數
- 5:錄制區域可自由拖動選擇
三、效果圖
![](https://img.laitimes.com/img/9ZDMuAjOiMmIsIjOiQnIsIiZpdmL3IGOlJmMhNDZ3ITYkFDNjFWN0EDMmBDM5MjN2gTZhFTN4MDNhdDNk9CXt92Yu4GZjlGbh5SZslmZxl3Lc9CX6MHc0RHaiojIsJye.gif)
四、頭檔案代碼
#ifndef GIFWIDGET_H
#define GIFWIDGET_H
/**
* GIF錄屏控件 作者:feiyangqingyun(QQ:517216493) 2019-4-3
* 1:可設定要錄制螢幕的寬高,支援右下角直接拉動改變.
* 2:可設定變寬的寬度
* 3:可設定錄屏控件的背景顔色
* 4:可設定錄制的幀數
* 5:錄制區域可自由拖動選擇
*/
#include <QDialog>
#include "gif.h"
class QLineEdit;
class QLabel;
#ifdef quc
#if (QT_VERSION < QT_VERSION_CHECK(5,7,0))
#include <QtDesigner/QDesignerExportWidget>
#else
#include <QtUiPlugin/QDesignerExportWidget>
#endif
class QDESIGNER_WIDGET_EXPORT GifWidget : public QDialog
#else
class GifWidget : public QDialog
#endif
{
Q_OBJECT
Q_PROPERTY(int borderWidth READ getBorderWidth WRITE setBorderWidth)
Q_PROPERTY(QColor bgColor READ getBgColor WRITE setBgColor)
public:
static GifWidget *Instance();
explicit GifWidget(QWidget *parent = 0);
protected:
bool eventFilter(QObject *watched, QEvent *event);
void resizeEvent(QResizeEvent *);
void paintEvent(QPaintEvent *);
private:
static QScopedPointer<GifWidget> self;
QWidget *widgetTop; //标題欄
QWidget *widgetMain; //中間部分
QWidget *widgetBottom; //底部欄
QLineEdit *txtFps; //幀率輸入框
QLineEdit *txtWidth; //寬度輸入框
QLineEdit *txtHeight; //高度輸入框
QPushButton *btnStart; //開始按鈕
QLabel *labStatus; //顯示狀态資訊
int fps; //幀數 100為1s
int borderWidth; //邊框寬度
QColor bgColor; //背景顔色
int count; //幀數計數
QString fileName; //儲存檔案名稱
QRect rectGif; //截屏區域
QTimer *timer; //截屏定時器
Gif gif; //gif類對象
Gif::GifWriter *gifWriter; //gif寫入對象
public:
int getBorderWidth() const;
QColor getBgColor() const;
private slots:
void initControl();
void initForm();
void saveImage();
void record();
void closeAll();
void resizeForm();
public Q_SLOTS:
void setBorderWidth(int borderWidth);
void setBgColor(const QColor &bgColor);
};
#endif // GIFWIDGET_H
五、核心代碼
#pragma execution_character_set("utf-8")
#include "gifwidget.h"
#include "qmutex.h"
#include "qlabel.h"
#include "qlineedit.h"
#include "qpushbutton.h"
#include "qlayout.h"
#include "qpainter.h"
#include "qevent.h"
#include "qstyle.h"
#include "qpixmap.h"
#include "qtimer.h"
#include "qdatetime.h"
#include "qapplication.h"
#include "qdesktopwidget.h"
#include "qdesktopservices.h"
#include "qfiledialog.h"
#include "qurl.h"
#include "qdebug.h"
#if (QT_VERSION > QT_VERSION_CHECK(5,0,0))
#include "qscreen.h"
#endif
QScopedPointer<GifWidget> GifWidget::self;
GifWidget *GifWidget::Instance()
{
if (self.isNull()) {
static QMutex mutex;
QMutexLocker locker(&mutex);
if (self.isNull()) {
self.reset(new GifWidget);
}
}
return self.data();
}
GifWidget::GifWidget(QWidget *parent) : QDialog(parent)
{
this->initControl();
this->initForm();
}
bool GifWidget::eventFilter(QObject *watched, QEvent *event)
{
static QPoint mousePoint;
static bool mousePressed = false;
QMouseEvent *mouseEvent = static_cast<QMouseEvent *>(event);
if (mouseEvent->type() == QEvent::MouseButtonPress) {
if (mouseEvent->button() == Qt::LeftButton) {
mousePressed = true;
mousePoint = mouseEvent->globalPos() - this->pos();
return true;
}
} else if (mouseEvent->type() == QEvent::MouseButtonRelease) {
mousePressed = false;
return true;
} else if (mouseEvent->type() == QEvent::MouseMove) {
if (mousePressed && (mouseEvent->buttons() && Qt::LeftButton)) {
this->move(mouseEvent->globalPos() - mousePoint);
return true;
}
}
return QWidget::eventFilter(watched, event);
}
void GifWidget::resizeEvent(QResizeEvent *e)
{
//拉動右下角改變大小自動指派
txtWidth->setText(QString::number(widgetMain->width()));
txtHeight->setText(QString::number(widgetMain->height()));
QDialog::resizeEvent(e);
}
void GifWidget::paintEvent(QPaintEvent *)
{
int width = txtWidth->text().toInt();
int height = txtHeight->text().toInt();
rectGif = QRect(borderWidth, widgetTop->height(), width - (borderWidth * 2), height);
QPainter painter(this);
painter.setPen(Qt::NoPen);
painter.setBrush(bgColor);
painter.drawRoundedRect(this->rect(), 5, 5);
painter.setCompositionMode(QPainter::CompositionMode_Clear);
painter.fillRect(rectGif, Qt::SolidPattern);
}
int GifWidget::getBorderWidth() const
{
return this->borderWidth;
}
QColor GifWidget::getBgColor() const
{
return this->bgColor;
}
void GifWidget::initControl()
{
this->setObjectName("GifWidget");
this->resize(800, 600);
this->setSizeGripEnabled(true);
QVBoxLayout *verticalLayout = new QVBoxLayout(this);
verticalLayout->setSpacing(0);
verticalLayout->setContentsMargins(11, 11, 11, 11);
verticalLayout->setObjectName("verticalLayout");
verticalLayout->setContentsMargins(0, 0, 0, 0);
widgetTop = new QWidget(this);
widgetTop->setObjectName("widgetTop");
widgetTop->setMinimumSize(QSize(0, 35));
widgetTop->setMaximumSize(QSize(16777215, 35));
QHBoxLayout *layoutTop = new QHBoxLayout(widgetTop);
layoutTop->setSpacing(0);
layoutTop->setContentsMargins(11, 11, 11, 11);
layoutTop->setObjectName("layoutTop");
layoutTop->setContentsMargins(0, 0, 0, 0);
QPushButton *btnIcon = new QPushButton(widgetTop);
btnIcon->setObjectName("btnIcon");
QSizePolicy sizePolicy(QSizePolicy::Minimum, QSizePolicy::Expanding);
sizePolicy.setHorizontalStretch(0);
sizePolicy.setVerticalStretch(0);
sizePolicy.setHeightForWidth(btnIcon->sizePolicy().hasHeightForWidth());
btnIcon->setSizePolicy(sizePolicy);
btnIcon->setMinimumSize(QSize(35, 0));
btnIcon->setFlat(true);
layoutTop->addWidget(btnIcon);
QLabel *labTitle = new QLabel(widgetTop);
labTitle->setObjectName("labTitle");
layoutTop->addWidget(labTitle);
QSpacerItem *horizontalSpacer = new QSpacerItem(87, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);
layoutTop->addItem(horizontalSpacer);
QPushButton *btnClose = new QPushButton(widgetTop);
btnClose->setObjectName("btnClose");
sizePolicy.setHeightForWidth(btnClose->sizePolicy().hasHeightForWidth());
btnClose->setSizePolicy(sizePolicy);
btnClose->setMinimumSize(QSize(35, 0));
btnClose->setFocusPolicy(Qt::NoFocus);
btnClose->setFlat(true);
layoutTop->addWidget(btnClose);
verticalLayout->addWidget(widgetTop);
widgetMain = new QWidget(this);
widgetMain->setObjectName("widgetMain");
QSizePolicy sizePolicy1(QSizePolicy::Preferred, QSizePolicy::Expanding);
sizePolicy1.setHorizontalStretch(0);
sizePolicy1.setVerticalStretch(0);
sizePolicy1.setHeightForWidth(widgetMain->sizePolicy().hasHeightForWidth());
widgetMain->setSizePolicy(sizePolicy1);
verticalLayout->addWidget(widgetMain);
widgetBottom = new QWidget(this);
widgetBottom->setObjectName("widgetBottom");
widgetBottom->setMinimumSize(QSize(0, 45));
widgetBottom->setMaximumSize(QSize(16777215, 45));
QHBoxLayout *layoutBottom = new QHBoxLayout(widgetBottom);
layoutBottom->setSpacing(6);
layoutBottom->setContentsMargins(11, 11, 11, 11);
layoutBottom->setObjectName("layoutBottom");
layoutBottom->setContentsMargins(9, 9, -1, -1);
QLabel *labFps = new QLabel(widgetBottom);
labFps->setObjectName("labFps");
layoutBottom->addWidget(labFps);
txtFps = new QLineEdit(widgetBottom);
txtFps->setObjectName("txtFps");
txtFps->setMaximumSize(QSize(50, 16777215));
txtFps->setAlignment(Qt::AlignCenter);
layoutBottom->addWidget(txtFps);
QLabel *labWidth = new QLabel(widgetBottom);
labWidth->setObjectName("labWidth");
layoutBottom->addWidget(labWidth);
txtWidth = new QLineEdit(widgetBottom);
txtWidth->setObjectName("txtWidth");
txtWidth->setEnabled(true);
txtWidth->setMaximumSize(QSize(50, 16777215));
txtWidth->setAlignment(Qt::AlignCenter);
layoutBottom->addWidget(txtWidth);
QLabel *labHeight = new QLabel(widgetBottom);
labHeight->setObjectName("labHeight");
layoutBottom->addWidget(labHeight);
txtHeight = new QLineEdit(widgetBottom);
txtHeight->setObjectName("txtHeight");
txtHeight->setEnabled(true);
txtHeight->setMaximumSize(QSize(50, 16777215));
txtHeight->setAlignment(Qt::AlignCenter);
layoutBottom->addWidget(txtHeight);
labStatus = new QLabel(widgetBottom);
labStatus->setObjectName("labStatus");
QSizePolicy sizePolicy2(QSizePolicy::Expanding, QSizePolicy::Preferred);
sizePolicy2.setHorizontalStretch(0);
sizePolicy2.setVerticalStretch(0);
sizePolicy2.setHeightForWidth(labStatus->sizePolicy().hasHeightForWidth());
labStatus->setSizePolicy(sizePolicy2);
labStatus->setAlignment(Qt::AlignCenter);
layoutBottom->addWidget(labStatus);
btnStart = new QPushButton(widgetBottom);
btnStart->setObjectName("btnStart");
sizePolicy.setHeightForWidth(btnStart->sizePolicy().hasHeightForWidth());
btnStart->setSizePolicy(sizePolicy);
layoutBottom->addWidget(btnStart);
verticalLayout->addWidget(widgetBottom);
labTitle->setText("GIF錄屏工具(QQ:517216493)");
labFps->setText("幀率");
labWidth->setText("寬度");
labHeight->setText("高度");
btnStart->setText("開始");
this->setWindowTitle(labTitle->text());
btnIcon->setIcon(style()->standardIcon(QStyle::SP_ComputerIcon));
btnClose->setIcon(style()->standardIcon(QStyle::SP_TitleBarCloseButton));
connect(btnClose, SIGNAL(clicked(bool)), this, SLOT(closeAll()));
connect(btnStart, SIGNAL(clicked(bool)), this, SLOT(record()));
connect(txtWidth, SIGNAL(editingFinished()), this, SLOT(resizeForm()));
connect(txtHeight, SIGNAL(editingFinished()), this, SLOT(resizeForm()));
}
void GifWidget::initForm()
{
borderWidth = 3;
bgColor = QColor(34, 163, 169);
fps = 10;
txtFps->setText(QString::number(fps));
gifWriter = 0;
timer = new QTimer(this);
timer->setInterval(100);
connect(timer, SIGNAL(timeout()), this, SLOT(saveImage()));
this->setAttribute(Qt::WA_TranslucentBackground);
this->setWindowFlags(Qt::FramelessWindowHint | Qt::WindowSystemMenuHint | Qt::WindowMinMaxButtonsHint | Qt::WindowStaysOnTopHint);
this->installEventFilter(this);
QStringList qss;
qss.append("QLabel{color:#ffffff;}");
qss.append("#btnClose,#btnIcon{border:none;border-radius:0px;}");
qss.append("#btnClose:hover{background-color:#ff0000;}");
qss.append("#btnClose{border-top-right-radius:5px;}");
qss.append("#labTitle{font:bold 16px;}");
qss.append("#labStatus{font:15px;}");
this->setStyleSheet(qss.join(""));
}
void GifWidget::saveImage()
{
if (!gifWriter) {
return;
}
#if (QT_VERSION <= QT_VERSION_CHECK(5,0,0))
//由于qt4沒有RGBA8888,采用最接近RGBA8888的是ARGB32,顔色會有點偏差
QPixmap pix = QPixmap::grabWindow(0, x() + rectGif.x(), y() + rectGif.y(), rectGif.width(), rectGif.height());
QImage image = pix.toImage().convertToFormat(QImage::Format_ARGB32);
#else
QScreen *screen = QApplication::primaryScreen();
QPixmap pix = screen->grabWindow(0, x() + rectGif.x(), y() + rectGif.y(), rectGif.width(), rectGif.height());
QImage image = pix.toImage().convertToFormat(QImage::Format_RGBA8888);
#endif
gif.GifWriteFrame(gifWriter, image.bits(), rectGif.width(), rectGif.height(), fps);
count++;
labStatus->setText(QString("正在錄制 第 %1 幀").arg(count));
}
void GifWidget::record()
{
if (btnStart->text() == "開始") {
if (0 != gifWriter) {
delete gifWriter;
gifWriter = 0;
}
//先彈出檔案儲存對話框
//fileName = qApp->applicationDirPath() + "/" + QDateTime::currentDateTime().toString("yyyy-MM-dd-hh-mm-ss.gif");
fileName = QFileDialog::getSaveFileName(this, "選擇儲存位置", qApp->applicationDirPath() + "/", "gif圖檔(*.gif)");
if (fileName.isEmpty()) {
return;
}
int width = txtWidth->text().toInt();
int height = txtHeight->text().toInt();
fps = txtFps->text().toInt();
gifWriter = new Gif::GifWriter;
bool bOk = gif.GifBegin(gifWriter, fileName.toLocal8Bit().data(), width, height, fps);
if (!bOk) {
delete gifWriter;
gifWriter = 0;
return;
}
count = 0;
labStatus->setText("開始錄制...");
btnStart->setText("停止");
//延時啟動
timer->setInterval(1000 / fps);
QTimer::singleShot(1000, timer, SLOT(start()));
//saveImage();
} else {
timer->stop();
gif.GifEnd(gifWriter);
delete gifWriter;
gifWriter = 0;
labStatus->setText(QString("錄制完成 共 %1 幀").arg(count));
btnStart->setText("開始");
QDesktopServices::openUrl(QUrl(fileName));
}
}
void GifWidget::closeAll()
{
if (0 != gifWriter) {
delete gifWriter;
gifWriter = 0;
}
this->close();
}
void GifWidget::resizeForm()
{
int width = txtWidth->text().toInt();
int height = txtHeight->text().toInt();
this->resize(width, height + widgetTop->height() + widgetBottom->height());
}
void GifWidget::setBorderWidth(int borderWidth)
{
if (this->borderWidth != borderWidth) {
this->borderWidth = borderWidth;
this->update();
}
}
void GifWidget::setBgColor(const QColor &bgColor)
{
if (this->bgColor != bgColor) {
this->bgColor = bgColor;
this->update();
}
}
六、控件介紹
- 超過149個精美控件,涵蓋了各種儀表盤、進度條、進度球、指南針、曲線圖、标尺、溫度計、導覽列、導航欄,flatui、高亮按鈕、滑動選擇器、農曆等。遠超qwt內建的控件數量。
- 每個類都可以獨立成一個單獨的控件,零耦合,每個控件一個頭檔案和一個實作檔案,不依賴其他檔案,友善單個控件以源碼形式內建到項目中,較少代碼量。qwt的控件類環環相扣,高度耦合,想要使用其中一個控件,必須包含所有的代碼。
- 全部純Qt編寫,QWidget+QPainter繪制,支援Qt4.6到Qt5.12的任何Qt版本,支援mingw、msvc、gcc等編譯器,支援任意作業系統比如windows+linux+mac+嵌入式linux等,不亂碼,可直接內建到Qt Creator中,和自帶的控件一樣使用,大部分效果隻要設定幾個屬性即可,極為友善。
- 每個控件都有一個對應的單獨的包含該控件源碼的DEMO,友善參考使用。同時還提供一個所有控件使用的內建的DEMO。
- 每個控件的源代碼都有詳細中文注釋,都按照統一設計規範編寫,友善學習自定義控件的編寫。
- 每個控件預設配色和demo對應的配色都非常精美。
- 超過130個可見控件,6個不可見控件。
- 部分控件提供多種樣式風格選擇,多種訓示器樣式選擇。
- 所有控件自适應窗體拉伸變化。
- 內建自定義控件屬性設計器,支援拖曳設計,所見即所得,支援導入導出xml格式。
- 自帶activex控件demo,所有控件可以直接運作在ie浏覽器中。
- 內建fontawesome圖形字型+阿裡巴巴iconfont收藏的幾百個圖形字型,享受圖形字型帶來的樂趣。
- 所有控件最後生成一個dll動态庫檔案,可以直接內建到qtcreator中拖曳設計使用。
- 目前已經有qml版本,後期會考慮出pyqt版本,如果使用者需求量很大的話。
七、SDK下載下傳
- SDK下載下傳連結: https://pan.baidu.com/s/1A5Gd77kExm8Co5ckT51vvQ 提取碼:877p
- 下載下傳連結中包含了各個版本的動态庫檔案,所有控件的頭檔案,使用demo,自定義控件+屬性設計器。
- 自定義控件插件開放動态庫dll使用(永久免費),無任何後門和限制,請放心使用。
- 目前已提供26個版本的dll,其中包括了qt5.12.3 msvc2017 32+64 mingw 32+64 的。
- 不定期增加控件和完善控件,不定期更新SDK,歡迎各位提出建議,謝謝!
- widget版本(QQ:517216493)qml版本(QQ:373955953)三峰駝(QQ:278969898)。
- 濤哥的知乎專欄 Qt進階之路 https://zhuanlan.zhihu.com/TaoQt
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