As previously written, ShowButton is a custom control inherited from QGraphicsWidget.
ShowButton * button = qobject_cast (sender ());
This sentence means that the QObject pointer of the sender () signal can be forced to obtain the desired type,
{Code...} does not actually work. How can we make it take effect in a clever way?
However, it does not actually work. How can we make it take effect in a clever way?
Reply content:
However, it does not actually work. How can we make it take
This is a reflection of the real life of the ing, I show it completely in the measurement space. One is a song and the other is a complete video.
Ing man's Song Poetry
Lyrics: Zhang Xinglong Xu Dongzi composing: Yang Lin SINGING: Jing Miao
This mode utilizes callback function technology.
Command. h
# Pragma once
# Include
Class ccommand{Public:Virtual void execute () = 0;};
Class creceiver{Public:Void action (){Qdebug () }};
Class concreatecommand: Public
Timeout code:
# Include
Using namespace STD;// Write a function to determine whether it is a prime number.Bool isprime (INT num){Int I = 2; // cout For (; I * I If (Num % I = 0) break;}If (I * I> num) return true;Else return false;}
Int main
I haven't published a blog for a long time. Today, it's a little uncomfortable .... I just got my diploma for two months, but I have been working for more than a year...
I have just read an article by my young predecessors-I have been recording my 18
Today, my colleague recommended a website called protopage, which is a cool custom web page service. With Ajax technology, you can easily add page modules, modify page styles, and view results in real time. For more information about webleon, see
How to learn PHP's spit slots
I also made PHP for some time. Explain it on a technical level.
there is a system for learning anything in depth.
1 complete learning throughout the architecture. Solve what's wrong.
recommend to see this. Http://
After reading the JavaScript data types and expressions and operator-related knowledge that you can his experiment a JavaScript pen question, I did not expect to die again and again in commas, colons and parentheses, we have to look at these
Wireless Internet access to the "threshold" is getting lower, as long as the wireless network card and wireless access points on hand, it has the conditions of wireless Internet access. correctly installing and setting the parameters of the wireless network card is the prerequisite to ensure the efficient access to wireless networks, however, in the process of "intimate contact" with the wireless network, it is often encountered that the system does not recognize the wireless network card phenom
wiring inside the fuselage. The signal effect is much better than that of the external wireless Nic, and it does not need to occupy the additional port of the local machine, there is no disadvantage that external wireless NICs are cumbersome. The biggest drawback is that the upgrade operation is troublesome, especially for low-cost models without built-in antennas. In addition, some brands (such as ThinkPad) use wireless network cards only to install products that pass their authentication, oth
45 degrees angle, and then press and hold the vertical at both ends of the wireless network card, when you hear a click, it indicates that the MiniPCI wireless network card has been installed.
Unfortunately, Mr. Li's current account is a "student computer", which only reserves the MiniPCI slot, but does not have a preset antenna. In this case, he had to buy a standard antenna separately. It took 20 yuan to buy an antenna with a moderate length, and t
With the further popularization of the handheld devices such as DC, DV, PDA and handheld game machine, the demand of card reader is increasing day by day. Many friends use USB card reader + memory card form, DIY USB flash drive. Not only convenient to read from the handheld devices, but also to achieve the use of U disk transmission file convenience. However, the USB drive is mostly small enough to occupy a valuable USB slot. Therefore, it is inconven
much better than that of the external wireless Nic, and it does not need to occupy the additional port of the local machine, there is no disadvantage that external wireless NICs are cumbersome. The biggest drawback is that the upgrade operation is troublesome, especially for low-cost models without built-in antennas. In addition, some brands (such as ThinkPad) use wireless network cards only to install products that pass their authentication, other products will report an error. In addition, be
After learning about the basic knowledge of wireless NICs, let's talk about the precautions for purchasing wireless NICs and the use of wireless devices such as wireless NICs and wireless NICs. First, we will focus on the three elements of wireless network card purchase.
Option 1: PCMCIA is the most suitable
Like many other peripherals, you also need to consider the interface selection when purchasing a wireless network card. Currently, wireless netwo
minutes
System returned to ROM by reload
System image file is "flash: c2600-i-mz.121-14.bin"
Procedure for upgrading a Cisco 3600 series router with a PCMCIA card
Create a console session to the vro
Check the remaining space of the flash card (PCMCIA slot)
Check whether the TFTP server has an IP connection to the vro.
Copy new image to flash memory via TFTP Serv
Wireless Internet access is a new trend, and the rise of it has caused a wave of buying wireless devices. However, when purchasing hardware, many friends often ignore whether the model of the wireless network adapter matches the model of their laptop. Here is a typical example for your analysis.
Typical Cases
Ignoring accessory interfaces is not common.
Both Mr. Zhang and his wife are white-collar workers. Unfortunately, both of them often encounter the need to go out to work. In order not to co
). It is equipped with a 13.3 Inch "wxga" mirror highlighted magnificent screen with a resolution of 1280x800.
Front and back of the machine
Left and right of the machine
Shenzhou q310y provides the following body interfaces: 3 USB2.0 interface, s terminal, ieee1394 interface, 1 PCMCIA expansion card slot, VGA port, headphone interface, microphone interface, DC power conne
bash-3.2# PRTDIAG Report General System Information Systems Configuration:vmware, Inc. VMware Virtual Platformbios Configuration:phoenix Technologie S LTD6.00 ./ Geneva/ .= = Processor Sockets ====================================Version location Tag-------------------------------- --------------------------Pentium (R) III CPU Socket #0Pentium (R) III CPU Socket #1= = = Memory Device Sockets ================================Type Status Set Device Locator Bank Locator------- ------ --- -----------
stream. Whether the computer message received by the system is completely sent. If any problem occurs,The recipient will be requested to resend the request. 2. Graphic Nic Figure 2 graphic PCI NicTaking the most common PCI interface Nic as an example, a card consists of a PCB circuit board, a main chip, data mercury, and a golden finger (bus slot interface), bootrom, EEPROM, crystal oscillator, RJ45 interface, indicator light, fixed chip, and some d
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