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The hardest part when writing these methods is dealing with the different coordinate systems involved, which can be explained as follows: Using this information we can then properly set up our methods that deal with the mouse events.Basically, while the mouse button is pressed in and the cursor is moved around, a selection box will be shown (look at the call to ), that will be constrained to the data grid, by setting appropriate limits to the drawing starting point and dimensions of our box.Furthermore, we do not allow the box to be drawn when the the button press event is outside of this box.When the mouse button is released, the box is removed from the widget but the .In order to demonstrate the capabilities of this widget, I have written a very basic program that tries to emulate my example from my previous post on Gtk Extra printing and exporting.However, I have added two extra capabilities: the possibility to zoom in with the selection box and window resizing.This package used to come with Gnome bindings that ensured easy integration into Gnome based GUIs but it looks like they have been removed some time ago (I am referring here to PLplot 5.11.0, the current stable release).
Obviously no problems arised while compiling PLplot on my Mac and I expect the same for Linux. I took care to provide support for both the old and new name of the PLplot C bindings, respectively called device that I will be using to connect a Cairo context with the PLplot plotting stream.
These function needs to be called in every call to as it is the only way to take into account window resizing.
An important feature typically found in plotting toolkits is the ability to drag selection boxes.
It would be remiss if I didn’t share the problems I encountered compiling PLplot on my Windows 7 64-bit virtual machine using the TDM-GCC provided Min GW-w64 5.1.0 gcc and g compilers.
I used the following command to setup the CMake based installation system: option determines whether the drivers will be loaded at runtime using the libtool ltdl interface, or if they will be built into the main shared library.Currently the documentation that covers this feature is limited to a README file and a minimal cairo-only example that demonstrates how to use the PLplot cairo driver through the device by producing a Post Script file.