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• Apache to Nginx Directory Rewrite

  - by Robin

  i am shifting my webapp to nginx and i have problems to get my htaccess working In Apache I have this : RewriteRule images/([0-9]+)x([0-9]+)/([0-9]+)x([0-9]+)/(.+)$ images/image.php?width=$1&height=$2&cropratio=$3:$4&image=/$5 [L,QSA] I already tried this from a converter but with no success : rewrite /images/([0-9]+)x([0-9]+)/([0-9]+)x([0-9]+)/(.+)$ /images/image.php?width=$1&height=$2&cropratio=$3:$4&image=/$5 break; Would be nice if somebody could point me in the right direction. Thank you :)

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• How do I zoom an MKMapView to the users current location without CLLocationManager?

  - by Danny Tuppeny

  With the MKMapView there's an option called "Show users current location" which will automatically show a users location on the map. I'd like to zoom into this location without adding a CLLocationManager (this seems silly if the map is already taking care of this). The problem is, I can't find a nice event that fires when the map has figured out the users location, so I don't know where to put the code that will zoom/scroll. I tried using the viewForAnnotation method like this: - (MKAnnotationView *) mapView:(MKMapView *)map viewForAnnotation:(id <MKAnnotation>)annotation { if ([annotation class] == [MKUserLocation class] ) { NSLog(@"UserLocation annotation"); return [map viewForAnnotation:annotation]; } return nil; } However it doesn't fire if the users location is off the screen. Is there a way to be notified when an MKMapView has got the user location so I can zoom in to it, or do I just have to add a CLLocationManager for this?

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• Django pagination | get current index of paginated item in page index, (not the page index range its

  - by cka

  I am trying to build a photo gallery with Django. It is set up by category. I have paginated the results of a category by n amount of images per page. I want to also use the paginator on the page that shows just the single image and have a prev/next button for the prev/next image in that category. My thought was to get the current index for the image itself and have that be the link to the /category/CUR_IMG_ID_PAGINATION_LIST/ as the result of paginating the entire set would yield the same index as the current image index in the paginated results. For instance if the image i want is image 45 out of 150 images total for a category, then when i paginate the 150 images the 45 will be the actual number of the page I want. If there's an easier way to do this, let me know. Django 1.1

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• php-curl script that saves images---actually captcha images

  - by user253530

  I have a curl class, called Curl. Let's presume i have this code: $url = 'http://www.google.com' $fields = array('q'=>'search term'); //maybe some other arguments. but let's keep it simple. $curl = new Curl(); $page = $curl->post($url,$fields); $page will have some images wich curl doesn't load them by default. I need to know how i can save a specific image without using curl. Once I use $page = $curl-post(..) I need to know how I can have that image saved without using another $curl-post(_image_location_) to get that file. The reason why need this is to save a captcha image from a form. I need to access the form and get that specific image that's being loaded. If i try to access the URL of the image, it will be a different captcha image.

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• Django and ImageField Question

  - by Hellnar

  Hello I have a such model: Foo (models.Model): slug = models.SlugField(unique=True) image = models.ImageField(upload_to='uploads/') I want to do two things with this: First of all, I want my image to be forced to resize to a specific width and height after the upload. I have tried this reading the documentation but seems to getting error: image = models.ImageField(upload_to='uploads/', height_field=258, width_field=425) Secondly, when adding an item via admin panel, I want my image's file name to be renamed as same as slug, if any issue arises (like if such named image already exists, add "_" to the end as it used to do. IE: My slug is i-love-you-guys , uploaded image such have i-love-you-guys.png at the end.

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• [OpenGl] Loading new texture into already defined texture name

  - by Dan Vogel

  I have an OpenGl program in which I am displaying an image using textures. I want to be able to load a new image to be displayed. In my Init function I call: Gl.glGenTextures(1, mTextures); Since only one image will be displayed at time, I am using the same texture name for each image. Each time a new image is loaded I call the following: Gl.glBindTexture(Gl.GL_TEXTURE_2D, mTexture[0]); Gl.glTexImage2D(Gl.GL_TEXTURE_2D, 0, Gl.GL_LUMINANCE, mTexSizeX, mTexSizeY, 0, Gl.GL_LUMINANCE, Gl.GL_UNSIGNED_SHORT, mTexBuffer); Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MIN_FILTER, Gl.GL_LINEAR); Gl.glTexParameteri(Gl.GL_TEXTURE_2D, Gl.GL_TEXTURE_MAG_FILTER, Gl.GL_LINEAR); The first image will display as expected. However, all images load after the first, display as all black. What am I doing wrong?

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• How does UIImage work in low-memory situations?

  - by kubi

  According to the UIImage documentation: In low-memory situations, image data may be purged from a UIImage object to free up memory on the system. Does anyone know how this works? It appears that this process is completely transparent and will occur in the background with no input from me, but I can't find any definitive documentation one way or the other. Second, will this data-purge occur when the image is not loaded by me? (I'm getting the image from UIImagePicker). Here's the situation: I'm taking a picture with the UIImagePickerController and and immediately taking that image and sending it to a new UIViewController for display. Sending the raw image to the new controller crashes my app with memory warnings about 30% of the time. Resizing the image takes a few moments, time that I'd rather not spend if there's a 3rd option available to me.

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• Assinging a GD reference to a new variable fails to copy

  - by Stomped

  This is a contrived example, but it illustrates my problem much more concisely then the code I'm using - and I've tested this and it exhibits the problem: $image = imagecreatefromjpeg('test.jpg'); $copy_of_image = $image; // The important bit imagedestroy($image); header('Content-type: image/jpeg'); imagejpeg($copy_of_image); Now, my expectation is that $copy_of_image is exactly that, but when I run this, it fails, printing out the URL of the script of all things. Comment out the imagedestroy() and it works just fine. a var_dump of $image provides: resource(3) of type (gd) So why can't I copy this? Apparently the assignment $copy_of_image = $image is creating a reference rather then a copy - is there a way to prevent that?

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• mouseOver event-mapping on iPad Safari with webkit-user-select: none

  - by Tim

  I don't have an iPad yet to find this out; have had only a brief opportunity to look at one at the Apple store. Could someone please describe what, if anything, happens to the mouseOver event of an image-map area when the image-map|area has had user-select disabled with "webkit-user-select: none" in the CSS, as described here in section 5: http://developer.apple.com/safari/library/technotes/tn2010/tn2262/index.html When a finger tip is placed on the image-map area and held there (i.e.not a tap) is the mouseOver eventhandler invoked under those circumstances? Or does nothing happen other than the image-map area doesn't change color because it's now unselectable? In my brief experience with the iPad at the Apple store, when user-select is not disabled, and the image-map area has a mouseOver eventhandler, a tap fires the mouseOver event rather than the click event. Thanks

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• Cisco ASA: How to route PPPoE-assigned subnet?

  - by Martijn Heemels

  We've just received a fiber uplink, and I'm trying to configure our Cisco ASA 5505 to properly use it. The provider requires us to connect via PPPoE, and I managed to configure the ASA as a PPPoE client and establish a connection. The ASA is assigned an IP address by PPPoE, and I can ping out from the ASA to the internet, but I should have access to an entire /28 subnet. I can't figure out how to get that subnet configured on the ASA, so that I can route or NAT the available public addresses to various internal hosts. My assigned range is: 188.xx.xx.176/28 The address I get via PPPoE is 188.xx.xx.177/32, which according to our provider is our Default Gateway address. They claim the subnet is correctly routed to us on their side. How does the ASA know which range it is responsible for on the Fiber interface? How do I use the addresses from my range? To clarify my config; The ASA is currently configured to default-route to our ADSL uplink on port Ethernet0/0 (interface vlan2, nicknamed Outside). The fiber is connected to port Ethernet0/2 (interface vlan50, nicknamed Fiber) so I can configure and test it before making it the default route. Once I'm clear on how to set it all up, I'll fully replace the Outside interface with Fiber. My config (rather long): : Saved : ASA Version 8.3(2)4 ! hostname gw domain-name example.com enable password ****** encrypted passwd ****** encrypted names name 10.10.1.0 Inside-dhcp-network description Desktops and clients that receive their IP via DHCP name 10.10.0.208 svn.example.com description Subversion server name 10.10.0.205 marvin.example.com description LAMP development server name 10.10.0.206 dns.example.com description DNS, DHCP, NTP ! interface Vlan2 description Old ADSL WAN connection nameif outside security-level 0 ip address 192.168.1.2 255.255.255.252 ! interface Vlan10 description LAN vlan 10 Regular LAN traffic nameif inside security-level 100 ip address 10.10.0.254 255.255.0.0 ! interface Vlan11 description LAN vlan 11 Lab/test traffic nameif lab security-level 90 ip address 10.11.0.254 255.255.0.0 ! interface Vlan20 description LAN vlan 20 ISCSI traffic nameif iscsi security-level 100 ip address 10.20.0.254 255.255.0.0 ! interface Vlan30 description LAN vlan 30 DMZ traffic nameif dmz security-level 50 ip address 10.30.0.254 255.255.0.0 ! interface Vlan40 description LAN vlan 40 Guests access to the internet nameif guests security-level 50 ip address 10.40.0.254 255.255.0.0 ! interface Vlan50 description New WAN Corporate Internet over fiber nameif fiber security-level 0 pppoe client vpdn group KPN ip address pppoe ! interface Ethernet0/0 switchport access vlan 2 speed 100 duplex full ! interface Ethernet0/1 switchport trunk allowed vlan 10,11,30,40 switchport trunk native vlan 10 switchport mode trunk ! interface Ethernet0/2 switchport access vlan 50 speed 100 duplex full ! interface Ethernet0/3 shutdown ! interface Ethernet0/4 shutdown ! interface Ethernet0/5 switchport access vlan 20 ! interface Ethernet0/6 shutdown ! interface Ethernet0/7 shutdown ! boot system disk0:/asa832-4-k8.bin ftp mode passive clock timezone CEST 1 clock summer-time CEDT recurring last Sun Mar 2:00 last Sun Oct 3:00 dns domain-lookup inside dns server-group DefaultDNS name-server dns.example.com domain-name example.com same-security-traffic permit inter-interface same-security-traffic permit intra-interface object network inside-net subnet 10.10.0.0 255.255.0.0 object network svn.example.com host 10.10.0.208 object network marvin.example.com host 10.10.0.205 object network lab-net subnet 10.11.0.0 255.255.0.0 object network dmz-net subnet 10.30.0.0 255.255.0.0 object network guests-net subnet 10.40.0.0 255.255.0.0 object network dhcp-subnet subnet 10.10.1.0 255.255.255.0 description DHCP assigned addresses on Vlan 10 object network Inside-vpnpool description Pool of assignable addresses for VPN clients object network vpn-subnet subnet 10.10.3.0 255.255.255.0 description Address pool assignable to VPN clients object network dns.example.com host 10.10.0.206 description DNS, DHCP, NTP object-group service iscsi tcp description iscsi storage traffic port-object eq 3260 access-list outside_access_in remark Allow access from outside to HTTP on svn. access-list outside_access_in extended permit tcp any object svn.example.com eq www access-list Insiders!_splitTunnelAcl standard permit 10.10.0.0 255.255.0.0 access-list iscsi_access_in remark Prevent disruption of iscsi traffic from outside the iscsi vlan. access-list iscsi_access_in extended deny tcp any interface iscsi object-group iscsi log warnings ! snmp-map DenyV1 deny version 1 ! pager lines 24 logging enable logging timestamp logging asdm-buffer-size 512 logging monitor warnings logging buffered warnings logging history critical logging asdm errors logging flash-bufferwrap logging flash-minimum-free 4000 logging flash-maximum-allocation 2000 mtu outside 1500 mtu inside 1500 mtu lab 1500 mtu iscsi 9000 mtu dmz 1500 mtu guests 1500 mtu fiber 1492 ip local pool DHCP_VPN 10.10.3.1-10.10.3.20 mask 255.255.0.0 ip verify reverse-path interface outside no failover icmp unreachable rate-limit 10 burst-size 5 asdm image disk0:/asdm-635.bin asdm history enable arp timeout 14400 nat (inside,outside) source static any any destination static vpn-subnet vpn-subnet ! object network inside-net nat (inside,outside) dynamic interface object network svn.example.com nat (inside,outside) static interface service tcp www www object network lab-net nat (lab,outside) dynamic interface object network dmz-net nat (dmz,outside) dynamic interface object network guests-net nat (guests,outside) dynamic interface access-group outside_access_in in interface outside access-group iscsi_access_in in interface iscsi route outside 0.0.0.0 0.0.0.0 192.168.1.1 1 timeout xlate 3:00:00 timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02 timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00 timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00 timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute timeout tcp-proxy-reassembly 0:01:00 dynamic-access-policy-record DfltAccessPolicy aaa-server SBS2003 protocol radius aaa-server SBS2003 (inside) host 10.10.0.204 timeout 5 key ***** aaa authentication enable console SBS2003 LOCAL aaa authentication ssh console SBS2003 LOCAL aaa authentication telnet console SBS2003 LOCAL http server enable http 10.10.0.0 255.255.0.0 inside snmp-server host inside 10.10.0.207 community ***** version 2c snmp-server location Server room snmp-server contact [email protected] snmp-server community ***** snmp-server enable traps snmp authentication linkup linkdown coldstart snmp-server enable traps syslog crypto ipsec transform-set TRANS_ESP_AES-256_SHA esp-aes-256 esp-sha-hmac crypto ipsec transform-set TRANS_ESP_AES-256_SHA mode transport crypto ipsec transform-set ESP-AES-256-MD5 esp-aes-256 esp-md5-hmac crypto ipsec transform-set ESP-DES-SHA esp-des esp-sha-hmac crypto ipsec transform-set ESP-DES-MD5 esp-des esp-md5-hmac crypto ipsec transform-set ESP-AES-192-MD5 esp-aes-192 esp-md5-hmac crypto ipsec transform-set ESP-3DES-MD5 esp-3des esp-md5-hmac crypto ipsec transform-set ESP-AES-256-SHA esp-aes-256 esp-sha-hmac crypto ipsec transform-set ESP-AES-128-SHA esp-aes esp-sha-hmac crypto ipsec transform-set ESP-AES-192-SHA esp-aes-192 esp-sha-hmac crypto ipsec transform-set ESP-AES-128-MD5 esp-aes esp-md5-hmac crypto ipsec transform-set ESP-3DES-SHA esp-3des esp-sha-hmac crypto ipsec security-association lifetime seconds 28800 crypto ipsec security-association lifetime kilobytes 4608000 crypto dynamic-map outside_dyn_map 20 set pfs group5 crypto dynamic-map outside_dyn_map 20 set transform-set TRANS_ESP_AES-256_SHA crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set transform-set ESP-AES-128-SHA ESP-AES-128-MD5 ESP-AES-192-SHA ESP-AES-192-MD5 ESP-AES-256-SHA ESP-AES-256-MD5 ESP-3DES-SHA ESP-3DES-MD5 ESP-DES-SHA ESP-DES-MD5 crypto map outside_map 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP crypto map outside_map interface outside crypto isakmp enable outside crypto isakmp policy 1 authentication pre-share encryption 3des hash sha group 2 lifetime 86400 telnet 10.10.0.0 255.255.0.0 inside telnet timeout 5 ssh scopy enable ssh 10.10.0.0 255.255.0.0 inside ssh timeout 5 ssh version 2 console timeout 30 management-access inside vpdn group KPN request dialout pppoe vpdn group KPN localname INSIDERS vpdn group KPN ppp authentication pap vpdn username INSIDERS password ***** store-local dhcpd address 10.40.1.0-10.40.1.100 guests dhcpd dns 8.8.8.8 8.8.4.4 interface guests dhcpd update dns interface guests dhcpd enable guests ! threat-detection basic-threat threat-detection scanning-threat threat-detection statistics host number-of-rate 2 threat-detection statistics port number-of-rate 3 threat-detection statistics protocol number-of-rate 3 threat-detection statistics access-list threat-detection statistics tcp-intercept rate-interval 30 burst-rate 400 average-rate 200 ntp server dns.example.com source inside prefer webvpn group-policy DfltGrpPolicy attributes vpn-tunnel-protocol IPSec l2tp-ipsec group-policy Insiders! internal group-policy Insiders! attributes wins-server value 10.10.0.205 dns-server value 10.10.0.206 vpn-tunnel-protocol IPSec l2tp-ipsec split-tunnel-policy tunnelspecified split-tunnel-network-list value Insiders!_splitTunnelAcl default-domain value example.com username martijn password ****** encrypted privilege 15 username marcel password ****** encrypted privilege 15 tunnel-group DefaultRAGroup ipsec-attributes pre-shared-key ***** tunnel-group Insiders! type remote-access tunnel-group Insiders! general-attributes address-pool DHCP_VPN authentication-server-group SBS2003 LOCAL default-group-policy Insiders! tunnel-group Insiders! ipsec-attributes pre-shared-key ***** ! class-map global-class match default-inspection-traffic class-map type inspect http match-all asdm_medium_security_methods match not request method head match not request method post match not request method get ! ! policy-map type inspect dns preset_dns_map parameters message-length maximum 512 policy-map type inspect http http_inspection_policy parameters protocol-violation action drop-connection policy-map global-policy class global-class inspect dns inspect esmtp inspect ftp inspect h323 h225 inspect h323 ras inspect http inspect icmp inspect icmp error inspect mgcp inspect netbios inspect pptp inspect rtsp inspect snmp DenyV1 ! service-policy global-policy global smtp-server 123.123.123.123 prompt hostname context call-home profile CiscoTAC-1 no active destination address http https://tools.cisco.com/its/service/oddce/services/DDCEService destination address email [email protected] destination transport-method http subscribe-to-alert-group diagnostic subscribe-to-alert-group environment subscribe-to-alert-group inventory periodic monthly subscribe-to-alert-group configuration periodic monthly subscribe-to-alert-group telemetry periodic daily hpm topN enable Cryptochecksum:a76bbcf8b19019771c6d3eeecb95c1ca : end asdm image disk0:/asdm-635.bin asdm location svn.example.com 255.255.255.255 inside asdm location marvin.example.com 255.255.255.255 inside asdm location dns.example.com 255.255.255.255 inside asdm history enable

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• Django ImageField validation & PIL

  - by Zayatzz

  Hello On sunday, I had problems with python modules, when I installed stackless python. Now I have compiled and installed : setuptools & python-mysqldb and i got my django project up and running again. (i also reinstalled django-1.1), Then I compiled and installed, jpeg, freetype2 and PIL. I also started using mod_wsgi instead of mod_python. But when uploading imagefield in form I get validationerror: Upload a valid image. The file you uploaded was either not an image or a corrupted image. Searchmonkey shows that it comes from field.py imagefield validation. before raising this error it imports Image from PIL, opens file and verfies it. I tried importing PIL from python prompt manually - it worked just fine. Same with Image.open and Image.verify. So what could be causing this problem? Alan

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• Force an unchecked call

  - by François Cassistat

  Hello, Sometimes, when using Java reflection or some special storing operation into Object, you end up with unchecked warnings. I got used to it and when I can't do anything about it, I document why one call is unchecked and why it should be considered as safe. But, for the first time, I've got an error about a unchecked call. This function : public <K,V extends SomeClass & SomeOtherClass<K>> void doSomethingWithSomeMap (Map<K,V> map, V data); I thought that calling it this way : Map someMap = ...; SomeClass someData = ...; doSomethingWithSomeMap(someMap, someData); would give me an unchecked call warning. Jikes does a warning, but javac gives me an error : Error: doSomethingWithSomeMap(java.util.Map,V) in SomeClass cannot be applied to (java.util.Map,SomeClass) Any way to force it to compile with a warning? Thanks.

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• Perspective Rotation about Y axis

  - by N.A.Reddy

  Hello Experts, I have a 2D image and I want to create a anaglyph image for this single 2D image. To do this I need to create Left and Right views. I will considar my 2D image as Left view and I want to create Right View now. I came to know that the perspective rotation (about Y axis) and perspective skews will give the right image. I know that the perspective projection is related to 3D. Basically I am new to 3D programming. Can you plz explain how to do perspective rotation abuout Y-axis. And how can I apply this to my 2D image.I am using C++. Thank you verymuch N.A.Reddy.

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• Issue with CSS drop down

  - by user277314

  Im having a little issue with the css drop down in my navigation. The products nav tab is suppose to have the drop down. Additionally, the nav works fine but it seems that the sub categories arent displaying correctly. HERE IS LINK Here is my navigation code: HTML <div id="nav"> <ul id="navlist"> <li><a href="home.html" id="nav-home">Home</a></li> <li><a href="company.html" id="nav-company">company</a></li> <li><a href="benefits.html" id="nav-benefits">benefits</a></li> <li><div id="nav-products2">Products</div> <ul> <li><a href="food.html" id="nav-food-serv">Food Processing Services</a></li> <li><a href="vehicle.html" id="nav-vehicle-serv">Vehicle Services</a></li> <li><a href="auto.html" id="nav-auto-serv">Automotive Services</a></li> <li><a href="laundry.html" id="nav-laundry-serv">Automotive Services</a></li> </ul> </li> <li><a href="laboratories.html" id="nav-labs">laboratories</a></li> <li><a href="industries.html" id="nav-industries">industries</a></li> <li><a href="contact.html" id="nav-contact">contact</a></li> </ul> </div> CSS #nav { float:left; width:1002px; height:42px; } #navlist { list-style: none; list-style-position:outside; list-style-type: none; } #navlist li{ float:left; } #navlist li a { display: block; height: 42px; overflow: hidden; background-position: top left; background-repeat: no-repeat; text-indent: -999em; } #navlist li a:hover { background-position: bottom left; } #navlist li .current {background-position: bottom left;} /* NAV SPECIFICS */ #nav-home {width: 129px; background-image: url(../images/nav/home.jpg);} #nav-company {width: 161px; background-image: url(../images/nav/company.jpg);} #nav-benefits {width: 133px; background-image: url(../images/nav/benefits.jpg);} #nav-products {width: 112px; background-image: url(../images/nav/products.jpg);} #nav-labs {width: 137px; background-image: url(../images/nav/laboratories.jpg);} #nav-industries {width: 169px; background-image: url(../images/nav/industries.jpg);} #nav-contact {width: 161px; background-image: url(../images/nav/contact.jpg);} #nav-food-serv {width: 161px; background-image: url(../images/nav/sub.jpg);} #nav-vehicle-serv {width: 161px; background-image: url(../images/nav/sub.jpg);} #nav-auto-serv {width: 161px; background-image: url(../images/nav/nav/sub.jpg);} #nav-laundry-serv {width: 161px; background-image: url(../images/nav/sub.jpg);} #nav-products2 {width: 112px; background-image: url(../images /nav/products.jpg);height: 42px; overflow: hidden; background-position: top left; background-repeat: no-repeat;text-indent: -999em;} #nav-products2:hover {background-position: bottom left;} #navlist li ul { /* second-level lists */ position: absolute; z-index:10; list-style:none; display: block; background: #000; width: 161px; left: -999em; /* using left instead of display to hide menus because display: none isn't read by screen readers */ margin:0; padding:0; border-left:1px solid #a58545; border-right:1px solid #a58545; } #navlist li ul li { list-style:none; display: block; clear:left; width:100%; } #navlist li ul li a { display:block; overflow: hidden; height:42px; background-position: top left; background-repeat: no-repeat; text-indent: -999em; margin:0; background-color:0; padding:0; width: 161px; } #navlist li ul li a:hover { background-position: bottom left; }

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• Does Safari have a timeout issue?

  - by woodysapsucker

  I have a website that works fine in Firefox and IE but never finishes loading in Safari 4.0.4. The live website loads a menu then loads a Google map. Using Safari, the Google map never loads. I have a test website on the same server that uses the exact same code for loading a Google map and Safari can load the map (this is the one that won't load on my live web). This test website does not have the menu - only the Google map. In both cases (live and test) the main web page calls a loadmap.js file. I've been pulling everything apart to try to identify why Safari won't finish loading. Has anyone run across any problems/solutions with Safari that may help me find a resolution to this problem?

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• How do I set a matplotlib colorbar extents?

  - by Adam Fraser

  I'd like to display a colorbar representing an image's raw values along side a matplotlib imshow subplot which displays that image, normalized. I've been able to draw the image and a colorbar successfully like this, but the colorbar min and max values represent the normalized (0,1) image instead of the raw (0,99) image. f = plt.figure() # create toy image im = np.ones((100,100)) for x in range(100): im[x] = x # create imshow subplot ax = f.add_subplot(111) result = ax.imshow(im / im.max()) # Create the colorbar axc, kw = matplotlib.colorbar.make_axes(ax) cb = matplotlib.colorbar.Colorbar(axc, result) # Set the colorbar result.colorbar = cb If someone has a better mastery of the colorbar API, I'd love to hear from you. Thanks! Adam

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• Dynamically Loading Google Maps api's

  - by ido

  Hi, Im trying to load the google maps api's dynamically. I'm using the following code: var head= document.getElementsByTagName('head')[0]; var script= document.createElement('script'); script.type= 'text/javascript'; script.src= 'http://www.google.com/jsapi?key=<MY_KEY>; head.appendChild(script); but when trying to create the map map = new GMap2(document.getElementById("map")); or map = new google.maps.Map2(document.getElementById("map")); I'm getting an error that google (or GMap2) is undefined.

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• WPF Custom Control - Designer looks fine, but I get a runtime issue...

  - by myermian

  MainWindow.xaml <Window x:Class="MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:my="clr-namespace:MyStuff;assembly=MyStuff" Title="MainWindow" Height="350" Width="525"> <Grid> <TabControl Margin="5"> <TabItem Header="Start Page" /> <my:XTabItem Header="Tab 1" Image="Resources/icon1.png" /> </TabControl> </Grid> </Window> Generic.xaml <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:MyStuff" > <!-- XTabItem --> <Style TargetType="{x:Type local:XTabItem}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type local:XTabItem}"> <Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}"> <StackPanel Orientation="Horizontal"> <Image Source="{Binding Path=Image, RelativeSource={RelativeSource TemplatedParent}}" Stretch="UniformToFill" MaxHeight="24" /> <TextBlock Text="{TemplateBinding Header}" /> <Button Content="X" /> </StackPanel> </Border> </ControlTemplate> </Setter.Value> </Setter> </Style> </ResourceDictionary> XTabItem.cs using System; using System.ComponentModel; using System.Windows; using System.Windows.Controls; using System.Windows.Media; namespace MyStuff { public class XTabItem : TabItem { #region Dependency Properties public static readonly DependencyProperty ImageProperty; #endregion #region Constructors / Initializer static XTabItem() { //Initialize the control as "lookless". DefaultStyleKeyProperty.OverrideMetadata(typeof(XTabItem), new FrameworkPropertyMetadata(typeof(XTabItem))); //Setup the dependency properties. ImageProperty = DependencyProperty.Register("Image", typeof(ImageSource), typeof(XTabItem), new UIPropertyMetadata(null)); } #endregion #region Custom Control Properties (Image) /// <summary> /// The image (icon) displayed by inside the tab header. /// </summary> /// <remarks>The image is specified in XAML as an absolute or relative path.</remarks> [Description("The image displayed by the button"), Category("Optional Properties")] public ImageSource Image { get { return (ImageSource)GetValue(ImageProperty); } set { SetValue(ImageProperty, value); } } #endregion } } Exception at line #9 () : XamlParseException : 'Provide value on 'System.Windows.Baml2006.TypeConverterMarkupExtension' threw an exception.' Line number '9' and line position '27'.

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• Threading extra state through a parser in Scala

  - by Travis Brown

  I'll give you the tl;dr up front I'm trying to use the state monad transformer in Scalaz 7 to thread extra state through a parser, and I'm having trouble doing anything useful without writing a lot of t m a -> t m b versions of m a -> m b methods. An example parsing problem Suppose I have a string containing nested parentheses with digits inside them: val input = "((617)((0)(32)))" I also have a stream of fresh variable names (characters, in this case): val names = Stream('a' to 'z': _*) I want to pull a name off the top of the stream and assign it to each parenthetical expression as I parse it, and then map that name to a string representing the contents of the parentheses, with the nested parenthetical expressions (if any) replaced by their names. To make this more concrete, here's what I'd want the output to look like for the example input above: val target = Map( 'a' -> "617", 'b' -> "0", 'c' -> "32", 'd' -> "bc", 'e' -> "ad" ) There may be either a string of digits or arbitrarily many sub-expressions at a given level, but these two kinds of content won't be mixed in a single parenthetical expression. To keep things simple, we'll assume that the stream of names will never contain either duplicates or digits, and that it will always contain enough names for our input. Using parser combinators with a bit of mutable state The example above is a slightly simplified version of the parsing problem in this Stack Overflow question. I answered that question with a solution that looked roughly like this: import scala.util.parsing.combinator._ class ParenParser(names: Iterator[Char]) extends RegexParsers { def paren: Parser[List[(Char, String)]] = "(" ~> contents <~ ")" ^^ { case (s, m) => (names.next -> s) :: m } def contents: Parser[(String, List[(Char, String)])] = "\\d+".r ^^ (_ -> Nil) | rep1(paren) ^^ ( ps => ps.map(_.head._1).mkString -> ps.flatten ) def parse(s: String) = parseAll(paren, s).map(_.toMap) } It's not too bad, but I'd prefer to avoid the mutable state. What I want Haskell's Parsec library makes adding user state to a parser trivially easy: import Control.Applicative ((*>), (<$>), (<*)) import Data.Map (fromList) import Text.Parsec paren = do (s, m) <- char '(' *> contents <* char ')' h : t <- getState putState t return $ (h, s) : m where contents = flip (,) [] <$> many1 digit <|> (\ps -> (map (fst . head) ps, concat ps)) <$> many1 paren main = print $ runParser (fromList <$> paren) ['a'..'z'] "example" "((617)((0)(32)))" This is a fairly straightforward translation of my Scala parser above, but without mutable state. What I've tried I'm trying to get as close to the Parsec solution as I can using Scalaz's state monad transformer, so instead of Parser[A] I'm working with StateT[Parser, Stream[Char], A]. I have a "solution" that allows me to write the following: import scala.util.parsing.combinator._ import scalaz._, Scalaz._ object ParenParser extends ExtraStateParsers[Stream[Char]] with RegexParsers { protected implicit def monadInstance = parserMonad(this) def paren: ESP[List[(Char, String)]] = (lift("(" ) ~> contents <~ lift(")")).flatMap { case (s, m) => get.flatMap( names => put(names.tail).map(_ => (names.head -> s) :: m) ) } def contents: ESP[(String, List[(Char, String)])] = lift("\\d+".r ^^ (_ -> Nil)) | rep1(paren).map( ps => ps.map(_.head._1).mkString -> ps.flatten ) def parse(s: String, names: Stream[Char]) = parseAll(paren.eval(names), s).map(_.toMap) } This works, and it's not that much less concise than either the mutable state version or the Parsec version. But my ExtraStateParsers is ugly as sin—I don't want to try your patience more than I already have, so I won't include it here (although here's a link, if you really want it). I've had to write new versions of every Parser and Parsers method I use above for my ExtraStateParsers and ESP types (rep1, ~>, <~, and |, in case you're counting). If I had needed to use other combinators, I'd have had to write new state transformer-level versions of them as well. Is there a cleaner way to do this? I'd love to see an example of a Scalaz 7's state monad transformer being used to thread state through a parser, but Scala 6 or Haskell examples would also be useful.

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• How to remove my backslash while input have underscore

  - by bob

  Problem when I enter any input which has underscore (_) data will store to my db looks like this image\_background.png Example $image = stripslashes($_POST['image']); // example image name image_background.png $query = 'UPDATE product SET image="' . $db->string_escape($image, true) . '" WHERE id="' . intval($id) . '"'; The problem coming when input has underscore only. If without underscore all backslashes will remove by the stripslashes Let me know.

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• OpenCV in Python can't scan through pixels

  - by Marco L.

  Hi everyone, I'm stuck with a problem of the python wrapper for OpenCv. I have this function that returns 1 if the number of black pixels is greater than treshold def checkBlackPixels( img, threshold ): width = img.width height = img.height nchannels = img.nChannels step = img.widthStep dimtot = width * height data = img.imageData black = 0 for i in range( 0, height ): for j in range( 0, width ): r = data[i*step + j*nchannels + 0] g = data[i*step + j*nchannels + 1] b = data[i*step + j*nchannels + 2] if r == 0 and g == 0 and b == 0: black = black + 1 if black >= threshold * dimtot: return 1 else: return 0 The loop (scan each pixel of a given image) works good when the input is an RGB image...but if the input is a single channel image I get this error: for j in range( width ): TypeError: Nested sequences should have 2 or 3 dimensions The input single channel image (called 'rg' in the next example) is taken from an RGB image called 'src' processed with cvSplit and then cvAbsDiff cvSplit( src, r, g, b, 'NULL' ) rg = cvCreateImage( cvGetSize(src), src.depth, 1 ) # R - G cvAbsDiff( r, g, rg ) I've also already noticed that the problem comes from the difference image got from cvSplit... Anyone can help me? Thank you

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• Linear Layout Issue at Runtime

  - by George

  Hi all, I am trying to build a layout dynamically which display some text and image for the most part, but has a series of buttons placed next to each other in the bottom. I have a linear layout that carries the text, another linear layout that carries the image. And yet another linear layout that carries the buttons that get created in a for loop. I have a main layout aligned vertical that adds the text, image and buttons layout, in that order. To finally generate something like this: Text .... Image ... Button1 Button2 Button3.... The problem is the number of buttons get decided at runtime, so if there are more than 4 buttons, the 5th button gets displayed really tiny. Also, when I tilt the phone, I get only the text and image showing, but no buttons coz the image covers the entire screen. Layoutting seems to be pretty complicated to me, any help is appreciated! Thanks George

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• Mapping Repeating Sequence Groups in BizTalk

  - by Paul Petrov

  Repeating sequence groups can often be seen in real life XML documents. It happens when certain sequence of elements repeats in the instance document. Here’s fairly abstract example of schema definition that contains sequence group: <xs:schemaxmlns:b="http://schemas.microsoft.com/BizTalk/2003"            xmlns:xs="http://www.w3.org/2001/XMLSchema"            xmlns="NS-Schema1"            targetNamespace="NS-Schema1" >  <xs:elementname="RepeatingSequenceGroups">     <xs:complexType>       <xs:sequencemaxOccurs="1"minOccurs="0">         <xs:sequencemaxOccurs="unbounded">           <xs:elementname="A"type="xs:string" />           <xs:elementname="B"type="xs:string" />           <xs:elementname="C"type="xs:string"minOccurs="0" />         </xs:sequence>       </xs:sequence>     </xs:complexType>  </xs:element> </xs:schema> And here’s corresponding XML instance document: <ns0:RepeatingSequenceGroupsxmlns:ns0="NS-Schema1">  <A>A1</A>  <B>B1</B>  <C>C1</C>  <A>A2</A>  <B>B2</B>  <A>A3</A>  <B>B3</B>  <C>C3</C> </ns0:RepeatingSequenceGroups> As you can see elements A, B, and C are children of anonymous xs:sequence element which in turn can be repeated N times. Let’s say we need do simple mapping to the schema with similar structure but with different element names: <ns0:Destinationxmlns:ns0="NS-Schema2">  <Alpha>A1</Alpha>  <Beta>B1</Beta>  <Gamma>C1</Gamma>  <Alpha>A2</Alpha>  <Beta>B2</Beta>  <Gamma>C2</Gamma> </ns0:Destination> The basic map for such typical task would look pretty straightforward: If we test this map without any modification it will produce following result: <ns0:Destinationxmlns:ns0="NS-Schema2">  <Alpha>A1</Alpha>  <Alpha>A2</Alpha>  <Alpha>A3</Alpha>  <Beta>B1</Beta>  <Beta>B2</Beta>  <Beta>B3</Beta>  <Gamma>C1</Gamma>  <Gamma>C3</Gamma> </ns0:Destination> The original order of the elements inside sequence is lost and that’s not what we want. Default behavior of the BizTalk 2009 and 2010 Map Editor is to generate compatible map with older versions that did not have ability to preserve sequence order. To enable this feature simply open map file (*.btm) in text/xml editor and find attribute PreserveSequenceOrder of the root <mapsource> element. Set its value to Yes and re-test the map: <ns0:Destinationxmlns:ns0="NS-Schema2">  <Alpha>A1</Alpha>  <Beta>B1</Beta>  <Gamma>C1</Gamma>  <Alpha>A2</Alpha>  <Beta>B2</Beta>  <Alpha>A3</Alpha>  <Beta>B3</Beta>  <Gamma>C3</Gamma> </ns0:Destination> The result is as expected – all corresponding elements are in the same order as in the source document. Under the hood it is achieved by using one common xsl:for-each statement that pulls all elements in original order (rather than using individual for-each statement per element name in default mode) and xsl:if statements to test current element in the loop:  <xsl:templatematch="/s0:RepeatingSequenceGroups">     <ns0:Destination>       <xsl:for-eachselect="A|B|C">         <xsl:iftest="local-name()='A'">           <Alpha>             <xsl:value-ofselect="./text()" />           </Alpha>         </xsl:if>         <xsl:iftest="local-name()='B'">           <Beta>             <xsl:value-ofselect="./text()" />           </Beta>         </xsl:if>         <xsl:iftest="local-name()='C'">           <Gamma>             <xsl:value-ofselect="./text()" />           </Gamma>         </xsl:if>       </xsl:for-each>     </ns0:Destination>  </xsl:template> BizTalk Map editor became smarter so learn and use this lesser known feature of XSLT 2.0 in your maps and XSL stylesheets.

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• Using PHP retrieved variables in Javascript

  - by mouthpiec

  Hi, I will use the following javascript to display a Google Map Window in a webpage. <script language = 'javascript'"> function initialize() { if (GBrowserIsCompatible()) { var map = new GMap2(document.getElementById("map_canvas")); map.setCenter(new GLatLng(35.904173, 14.433396), 16); map.setUIToDefault(); } } </script> I would like to read the coordinates from a db, to generate the map using PHP, but how is it possible to use the retrieved(eg $lat = xxx and $lon = yyy) values into the javascript?

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• How can I tell groovy/grails not to try to "re-encode" binary data? (Revised title)

  - by ?????

  I have a groovy/grails application that needs to serve images It works fine on my dev box, the image is returned properly. Here's the start of the returned JPEG, as seen by od -cx 0000000 377 330 377 340 \0 020 J F I F \0 001 001 001 001 , d8ff e0ff 1000 464a 4649 0100 0101 2c01 but on the production box, there's some garbage in front, and the d8ff e0ff before the 1000 is missing 0000000 ? ** ** ? ** ** ? ** ** ? ** ** \0 020 J F bfef efbd bdbf bfef efbd bdbf 1000 464a 0000020 I F \0 001 001 001 \0 H \0 H \0 \0 ? ** ** ? 4649 0100 0101 4800 4800 0000 bfef efbd It's the exact same code. I just moved the .war over and run it on a different machine. (Isn't Java supposed to be write once, run everywhere?) Any ideas? An "encoding" problem? The code is sent to the response like this: response.contentType = "image/jpeg"; response.outputStream << out; Here's the code that locates the image on an internal application server and re-serves the image. I've pared down the code a bit to remove the error handling, etc, to make it easier to read. def show = { def address = "http://internal.application.server:9899/img?photoid=${params.id}" def out = new ByteArrayOutputStream() out << new URL(address).openStream() response.contentLength = out.size(); // XXX If you don't do this hack, "head" requests won't work! if (request.method == 'HEAD') { render( text : "", contentType : "image/jpeg" ); } else { response.contentType = "image/jpeg"; response.outputStream << out; } } Update: I tried setting the CharacterEncoding response.setCharacterEncoding("ISO-8859-1"); if (request.method == 'HEAD') { render( text : "", contentType : "image/jpeg" ); } else { response.contentType = "image/jpeg;charset=ISO-8859-1"; response.outputStream << out; } but it made no difference in the output. On my production machine, the binary bytes in the image are re-encoded/escaped as if they were UTF-8 (see Michael's explanation below). It works fine on my development machine.

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