I know how to draw an object arrow on the chart, which I usually do like this:
ObjectCreate(0,"prevHigh",OBJ_ARROW_DOWN,0,Time[0],High[highestCandle]);
ObjectSetInteger(0, "prevHigh", OBJPROP_COLOR, clrRed);
Now I have an indicator which (I didn't code myself and is a .ex4 file which) draws up/down arrows on the chart as seen in the image (https://imgur.com/a/8yG0suw).
How can I when for example a Magenta down arrow has been drawn and the candle (index) at which it is drawn?
Please note that the arrows not in the list of objects on the chart
Q : "How can I recognise programmatically when an up/down arrow is drawn on a chart?"
Given the facts above, your test ought evaluate the moment the CustomIndicator ( via a published / used iCustom()-call signature ) by checking it as it goes from EMPTY_VALUE to any value != EMPTY_VALUE.
Given the CustomIndicator is a closed source ( *.ex4 ) you may need to check, if it did set its own ( hidden from our sight ) value, other than a current visible EMPTY_VALUE, yet this "re-calibration" will work, after you get a few manual tests of the CustomIndicator values for bars, that do not show any arrow - like for the 2020-Apr-08 09:30 et al v/s the displayed arrows are not the MQL4-Objects on their own, they are the closed-source CustomIndicator's SetIndexStyle() / SetIndexArrow() by-products, thus not inspectable either in the Object-List, or in the *.mq4 source-code.
Yet, detectable
Related
Is it possible for an EA to open a trade when an indicator places an arrow on the current candle or a previous candle? If yes, how?
I have an indicator that places an arrow where a trade say a BUY or a SELL can be placed. I know that we use code below to get the values of the signal.
double signal_v = iCustom(Symbol(),PERIOD_M1, "My Custom Indicator", 0, 1);
The indicator in this question places an arrow, and I want to know if there is a way one can tell if an arrow has been placed on the current or previous candle by this specific indicator. I have seen any sample codes so I was asking. Kindly.
1 in your example is number of bar (0 - current, 1 - previous one), 0 is the buffer.
For sure you will have at least two buffers if arrows are implemented from buffers (easy to check - open chart and delete all objects. if arrows stay there - then indicator has buffers and arrows are based on buffers. Open data window and check the bar that has an arrow - it must have value in some buffer line that is not zero and not empty, you can compare to other bars with no buffers.
Do not forget that you have to pass all indicator inputs after "My Custom Indicator" otherwise you will upload the indicator with default settings, not what you need.
While using Delphi Seattle 10 and Steema TeeChart Pro VCL FMX 2016.18, I am looking to Highlight a Selection of a Line Graph (multiple series) in the way that Zooming allows / makes a square around a highlighted selection of a Line Graph to indicate which part of it to zoom into (as long as the onmousedown action is in progress).
The purpose of this would be to allow the selection to remain highlighted while the mouse is no longer being clicked, to potentially "Delete" the highlighted Data points. All I need this for is to obtain the (X0 Y0 X1 Y1) values to possibly obtain the CalcPosPoint(X) and remove all the points inside. The data is currently obtained through a Record Struct (Memory Mapped) file, and it will there for be used to set/check for a property "deleted" to indicate on the next redraw of the graph which rows to completely ignore and which to continue printing.
I hope to be able to do this (select from 1 chart), and have it simultaneously draw on multiple graphs. I have tried to look for an example of this feature through the use of TSelectorTool (FMXTee). One of the pages I found referring to such a tool is Interactive data point selection as well as Multiple selections with Selector Tool
And my second question has to do with TeeCharts directly. Where would I find fmx240.bpl as TeeChart_Pro_Firemonkey_Demo.exe requires this file in order to run? I did manage to copy vcl240.bpl from "Embarcadero\Studio\18.0\bin" and put it into "Embarcadero\Studio\17.0\bin"
[Edited]
I have managed to capture / create a sample code (MVCE) from which I can now select a portion and create a square around a particular sample of graph lines.
The control graph right now is the bottom graph (Chart5). If anyone is interested in seeing the code, I have put up a pastebin sample.
PasteBin Sample Code
And a TeeCharts.tar.gz is accessible to anyone who wishes to see a sample of the code, as well as the data sample.
filetolink.com Source Files
I no longer feel the need for mathematical equation to differentiate the top graphs from the bottom (because the bottom axes are automatic where as the top are defined). I intend to only use the space which is adherent to the visible space, and do not intend to extend in either direction (left or right). That means at this point the size of the graph does not matter, because once I over populate the charts above, the position in the bottom graph would become irrelevant, and therefor I do not intend to use the bottom chart.
The next step is to save the positions of the boxes so that they can reappear when the graph is shift from left (past data) to the right (live data). And then uses the buttons above to make the appropriate action to the graphs.
I would like to know what way would be the most sufficient way to record the positions of the rectangles, so when the chart is shifted (via the ScrollBar1), the rectangles are moving with the direction of the scrollbar. But I'm sure I can achieve that.
I think I have found a solution. The red squares are only prevalent for the visual aspect, they can be drawn on, I don't need to do anything special with each chart, as I already know what the X0..Y1 parameters are, they are known from the initial chart. The problem h/e has to do with the initial chart. As long as the screens are all full, I can zoom in correctly w/ alignment with on all the charts (ZoomRect/Rectf(X0..Y1))
But what kind of equation would it take to adjust the charts that are not in the same zoom / max / min when the Chart5.Axes.Bottom.Automatic = True?
From there I just simply have to disable the immediate zoom feature, and allow buttons to become functional, to decide what the next course of action would be.
I am using openlayers-3 modify interaction to edit vector layers. When a polygon/polyline is being edited, if mouse is close to a line segment, a small circle is drawn and dragging it creates a new vertex or moves an existing vertex, depending on where on the segment I was hovering.
Now, sometimes this is very difficult to understand if I am hovering on an existing vertex, or on middle of a segment. I have thought about two solutions to the problem:
Highlight the segment I am hovering with a different style so that I
can see its edges.
When hovering on an vertex, style the small
circle with a different style.
Is there a way to achieve any of the two?
It can be done changing the interaction condition like:
var selectPointerMove_Highlight = new ol.interaction.Select({
condition: ol.events.condition.pointerMove
});
map.addInteraction(selectPointerMove_Highlight);
I have an online example.
I'm building a color box connecting game with objective-C and trying to figure out how to find the correct position when a block of boxes is placed incorrectly over another block of boxes.
See the attach image. In the image, you only need to move the left box one step to the right in order to connect the boxes and win.
However, if you place the left box on top of the other box (Image 2), I want to move it to the closest available free grid position.
This would be easy if the box was a simple square (a 1x1 grid, 2x2 grid, etc), but since the boxes can be complex, It's harder. There might also be a lot of boxes on the grid.
Any suggestions would be very appreciated.
If you're new to heuristics like this, just take the KISS approach.
It couldn't be easier...
The user tries the object at x,y ok?
It does not "fit" there.
So, simply "spiral" outwards, trying it in other possible places.
Just keep trying until you find one where it fits.
234
915
876
so that's like "radius 1", you see? then try "radius 2"
and so on.
It's that easy. Just keep trying until you find one that "does work".
Work from the start position outwards, so that, you find the closest one.
Please help me to get the screen coordinates of the state icon rectangle of the given TTreeNode in a TreeView (I mean the icons specified in the TTreeView.StateImages property).
There is a TTreeView.GetHitTestInfoAt(X, Y: integer): : THitTests function, but that is not quite what I'm looking for; it says whether the given coordinates correspond to the label, or to the icon, or to the state icon of the item, but I need to know what part of the icon was clicked.
(The reason is that I want to implement the TreeView nodes with two checkboxes for each item, and I use StateImages to simulate the checkboxes (one state is a checked item, the other state is an unchecked item). As I understand, to know which one of the checkboxes is clicked I need to compare the cursor coordinates with the state icon coordinates. How can I get them?)
You can send the control a tvm_GetItemRect message which will tell you the client coordinates of the item's bounding box. Use that and what you know of the relative positions of the label text and the icons to determine where the mouse was clicked in the icon.
Instead of GetHitTestInfoAt, you might prefer to send a tvm_HitTest message instead since it will give you the hit-test information and an item handle at once; a handle is what tvm_GetItemRect requires.
You don't need the screen coordinates since all the coordinates involved so far are client coordinates, but you can call ClientToScreen if you really want screen coordinates.